最新刊期
卷 32 ， 期 12 ， 2013
- 摘要：A high sensitive and specific electrochemical sensor based on Exo Ⅲ assisted target cycle and long-range self-assembled DNA nanostructures was developed for the detection of the sequence related to breast cancer.Firstly,a stem-loop hairpin probe was immobilized on the surface of a gold electrode(GE).In the presence of target DNA,it could switch on a cycle including hybridization,digestion and rehybridization as the first signal amplification.Then the addition of two assisted probes could trigger the formation of super sandwich DNA nanostructures on the electrode surface by long-range self-assembly.The above prepared structure could absorb a large number of electrochemically active molecules RuHex on the surface of GE,resulting in an intense electrochemical response as the second signal amplification.Under the optimum conditions,the sensor showed a good linear relationship in the range of 10 amol/L- 10 pmol/L with a detection limit as low as 8 amol/L.Furthermore,the sensor exhibited an ultra-high discrimination ability even against single-base mismatch sequence.All above properties make it a promising candidate for the ultra-low detection of DNA in clinical real samples.关键词：Exo Ⅲ assisted target cycle;long-range self-assembled DNA nanostructure;electrochemical sensor;breast cancer
- 1946
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- 1039
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发布时间： - 摘要：A mixed mode solid phase extraction（SPE） coupled with ultra high pressure liquid chromatography（UPLC） was developed for the determination of seven aniline derivatives（ADs） in waste water by optimizing chromatographic analysis,SPE and nitrogen-blowing concentration.200 mL water sample was loaded onto MCX SPE cartridges with a flow rate of 5 mL/min,and ADs were immobilized on SPE column with 4 mL 2% formic acid.Before eluted with 4 mL methanol containing 2% ammonia,the column was cleaned up with 4 mL 25% methanol.The elute was concentrated to 1 mL by nitrogen blowing at 50 ℃,and filtered through a microfiltration membrane（0.22 μm,nylon）.The separation of ADs was performed on a BEH C18 column（2.1 mm×50 mm,1.7 μm） by gradient elution using methanol-50 mmol/L ammonium acetate.The UV detector was set at 250 nm.Under the optimal conditions,seven ADs were separated by baseline within 6.5 min.The calibration curves for seven ADs were linear in the range of 0.1-5.0 mg/L with correlation coefficients more than 0999.The method limits of detection（S/N=3） and limits of quantitation（S/N=10） were 0.10-0.50 μg/L and 0.33-1.67 μg/L,respectively.The recoveries of seven ADs at spiked levels of 0.2 μg and 1.0 μg were 52%-101% and 54%-96%,with RSDs of 2.2%-11.3% and 2.5%-9.0%,respectively.With the advantages of good anti-interference ability,rapidness and sensitivity,the method was suitable for the detection of ADs in waste water.关键词：aniline derivatives;mixed-mode solid phase extraction;ultra high pressure liquid chromatography;waste water
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发布时间： - 摘要：A method was established for the simultaneous determination of tetramethylpyrazine,liquiritin and nuciferine in toner,emulsion,cream and gel skin care products by ultra-high performance liquid chromatography with a diode array detector(UPLC-PDA).The different kinds of cosmetic samples were extracted with methanol by ultrasonic wave,then the extracts were centrifuged,filtrated,and analyzed by UPLC-PDA on a Waters BEH C18 column(2.1 mm×50 mm,1.7 μm),employing acetonitrile-0.05% phosphoric acid aqueous solution as mobile phase by gradient elution.The targets were qualitatively determined by retention time,and confirmed by ultraviolet spectra.The external standard method was applied for the quantification analysis.The results indicated that the linear correlation coefficients of three targets ranged from 0.999 4 to 0.999 9 within the linear range of 0.05-50.0 mg/L.The detection limits(S/N=3) of tetramethylpyrazine,liquiritin and nuciferine were 0.6,0.6,0.3 mg/kg,and the limits of quantitation(S/N=10) were 2.0,2.0,1.0 mg/kg,respectively.The spiked recoveres of three compounds at spiked levels of 1-200 mg/kg were between 85.6% and 98.2%,with RSDs(n=6) of 1.1%-6.1%.The results showed that this method was stable,accurate and precise,and could be used to assay the three mentioned compounds in different skin care products.关键词：skin care products;tetramethylpyrazine;liquiritin;nuciferine;ultra high performance liquid chromatography(UPLC)
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发布时间： - 摘要：A sensitive molecularly imprinted electrochemical sensor was fabricated for selective detection of caffeine by electroploymerization of o-phenylenediamine on glassy carbon electrode（GCE） modified with multi-walled carbon nanotubes（MWNTs）.The template can be quickly removed in 0.1 mol?L-1 HCl.The molecularly imprinted sensor was characterized by cyclic voltammetry and linear sweep voltammetry.The molecular imprinted polymer based sensor displayed an excellent recognition capacity toward caffeine.The linear sweep voltammetry peak current was linear in the analyte concentration range of 2.0×10-7-2.0×10-5 mol?L-1,with a detection limit of 4.0×10-8 mol?L-1.The sensor was applied in the determination of caffeine in Tieguanyin teas,with recoveries of 94%-106%．关键词：multi-walled carbon nanotubes;molecular imprinting technique;caffeine;electrochemical sensor
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发布时间： - 摘要：The interaction mode of Di-n-octyl phthalate(DnOP) with human serum albumin(HSA) in physiological buffer(pH 7.4) was determined by multispectroscopic methods including fluorescence,Ultraviolet-visible(UV-vis) absorption,circular dichroism(CD) and Fourier transform infrared(FT-IR) spectroscopy,coupled with molecular modeling technique.Results obtained from the analysis of fluorescence titration indicated that the fluorescence quenching of DnOP for HSA was a static procedure resulting.The thermodynamic analysis of the binding data obtained at different temperatures indicated that the interaction between DnOP and HSA was mainly driven by hydrophobic interactions and hydrogen bonds,as the values of the entropy change(ΔS°) and the enthalpy change(ΔH°) were found to be 35.32 J?mol-1?K-1 and -9.13 kJ?mol-1,respectivelyThe site marker competitive experiments using different kinds of probes suggested a displacement reaction occurred between Eosin Y and DnOP with HSA.This result indicated that the binding site of DnOP to HSA located in the subdomain ⅡA(Site Ⅰ).Molecular modeling studies also proved that DnOP molecules inserted into the large hydrophobic activity of subdomain ⅡA by the hydrophobic interactions and hydrogen bond between oxygen atom of carboxide and residue His242.UV-vis absorption,CD and FT-IR spectra revealed that the binding of DnOP to HSA changed the second structure of HSA with a loss of α-helical content，which suggested a partial unfolding of the polypeptide chain of the protein in the presence of DnOP.关键词：Di-n-octyl phthalate;human serum albumin;binding mode;spectroscopy;molecular modeling
- 2453
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- 1060
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发布时间： - 摘要：In order to establish a rapid detection technique of ascorbic acid(AA),with AA as template molecule and o-phenylenediamine(o-PD) as functional monomer,poly(o-phenylenediamine)(PPD) film was electropolymerized on the surface of a glassy carbon electrode using cyclic voltammetry(CV).Furthermore,the ultrapure water was used to elute the template molecules.The experimental conditions for the electropolymerization reaction were optimized and listed as follows:reaction medium:0.20 mol/L HAc-NaAc buffer(pH 5.2) ,molar ratio of o-PD to AA:1∶2,potential range:0-0.8 V,scan rate:50 mV?s-1.The electrochemical properties of the molecularly imprinted sensor were investigated using CV,square wave voltammetry(SWV) and current-time curve(I-t) methods.The response current of the sensor had good linear relationships with concentration of AA in the ranges of 1.0×10-6-1.0×10-3 mol/L and 1.0×10-3-4.5×10-3 mol/L,respectively.The detection limit was 4.9×10-7 mol/L.The proposed method was applied in the determination of AA in commercial orange juice,and 2,6-dichlorophenol indophenol titration method was used for verification.The results showed that the method was rapid,accurate and inexpensive,and was suitable for the determination of AA in orange juice and other food samples.关键词：molecularly imprinted;ascorbic acid(AA);electropolymerization;electrochemical sensor;poly(o-phenylenediamine)
- 2331
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发布时间： - 摘要：A novel electrode based on graphitic carbon nitride and nafion modified glassy carbon electrode was fabricated.The modified electrode was used to determine cadmium（Ⅱ） in acetate buffer solutions.The factors for determination of Cd2+,including graphitic carbon nitride amount,pH value,potential and time for pre-concentration were optimized.Under the optimum conditions（pH 4.5,deposition potential:-1.2 V,accumulation time:5 min,amount of modifier:10 μL）,the stripping peak currents of Cd2+ were linear in the concentration range of 1.0×10-7-1.4×10-5 mol/L,and the linear equation is I（μA）=8.03 c（μmol/L）-2.00,r=0.998 5.The detection limit（3σ） was 3.3×10-8 mol/L.The modified electrode showed an excellent anti-interference property,and common inorganic ions had no effect on the determination of cadmium.The modified electrode was successfully applied in the determination of Cd2+ in tap water with recoveries of 98.8%-99.6%.关键词：graphitic carbon nitride;cadmium;square stripping voltammetry;modified electrode
- 2095
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- 1002
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- 2
发布时间： - 摘要：A hydrophilic interaction chromatography-tandem mass spectrometric（HILIC-MS/MS） method was developed for the simultaneous determination of amantadine and ribavirin in animal tissues.After added isotopically labeled standards as the internal standards,the sample was extracted with 20 g/L trichloroacetic acid and enzymed with acid phosphatase,then purified with PBA cartridge.The targeted compounds were separated on a HILIC column（100 mm×2.1 mm,3 μm） by gradient elution with 5 mmol/L ammoniumacetate（containing 0.1% formic acid） and acetonitrile as mobile phases,and detected by MS/MS in positive electrospray ionization and multiple reaction monitoring（MRM） mode.The quantification was performed by the internal standard method.The calibration curves showed good linearity in the range of 0.5-5.0 μg/L.The limits of quantitation for amantadine and ribavirin were 1.0 μg/kg and 2.0 μg/kg,respectively.The recoveries for chicken musle and liver samples at three spiked levels were in the range of 89.2%-109% with relative standard deviations of 2.0%-9.3%.This method was accurate,reliable and simple,and was suitable for the analysis of amantadine and ribavirin in animal tissues.关键词：hydrophilic interaction chromatography-tandem mass spectrometry（HILIC-MS/MS）;amantadine;ribavirin;animal tissues
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发布时间： - 摘要：An effective method was established for the simultaneous determination of 18 banned polycyclic aromatic hydrocarbons（PAHs) in paper packaging materials contacting with foodstuffs by gas chromatography-mass spectrometry/selected ion monitor technique（GC/MS-SIM) coupled with microwave assisted extraction（MAE).PAHs in samples were extracted by MAE at 90 ℃ using dichloromethane-hexane（1∶1) as extraction solvent.The extract was firstly extracted with dimethyl sulfoxide,then reversely extracted with cyclohexane,followed by purification of silica solid phase extraction column.The analysis of targeted compounds was performed by GC-MS/SIM with the external standard method.The calibration curves were linear in the certain concentration with correlation coefficients more than 0.997.The detection limits varied from 0.1 μg/kg to 1.0 μg/kg.The average spiked recoveries ranged from 56.3% to 95.4% with relative standard deviations（RSDs) all less than 7%.The proposed method was simple,rapid,sensitive and accurate,and was suitable for the analysis of PAHs in paper packaging materials contacting with foodstuffs.关键词：polycyclic aromatic hydrocarbons;paper packaging materials contacting;microwave assisted extraction;gas chromatography-mass spectrometry/selected ion monitoring technique（GC-MS/SIM)
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发布时间： - 摘要：Electrochemical oxidation mechanism and voltammetric detection of bisphenol A（BPA） mediated by ［Fe（phen）3］2+（phen=1,10-phenanthroline） on an indium-tin oxide（ITO） electrode in sodium dodecylsulfate（SDS）-ethanol-water systems were investigated by means of cyclic voltammetry and differential pulse voltammetry.［Fe（phen）3］2+ showed a good electrocatalytic activity for BPA oxidation,depending on ethanol-to-water volume ratio,SDS and BPA concentrations.In the ethanol-water（1∶5） system,the addition of 0.25 mmol?L-1 SDS could facilitate the electrocatalytic oxidation of BPA by ［Fe（phen）3］2+ on the ITO electrode.In the ethanol-water（1∶5） system containing 0.25 mmol?L-1 SDS,a significant electrocatalytic oxidation peak at ca.0.731 V was observed in the DPV curve,and its peak currents were linear for BPA concentration in the range of 0.2 - 20 μmol?L-1（r=0.999 9）.The detection limit（S/N=3） of BPA is 0.034 μmol?L-1 and the relative standard deviation（RSD,n=3） is 2.1%.The proposed method was successfully used to analyze BPA in water samples with recoveries of 96.9%-100.7%.The electrochemical oxidation mechanism of BPA mediated by ［Fe（phen）3］2+ in the SDS-ethanol-water system was also discussed.This study not only helps us better understand the electrocatalytic oxidation mechanisms of phenolic pollutants by redox mediators in microemulsion systems,but also provides a new idea for the fabrication of electrochemical sensors.关键词：bisphenol A;polypyridyl iron（Ⅱ） complex;electrocatalytic oxidation;voltammetric detection
- 1840
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- 1025
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- 1
发布时间： - 摘要：To analyze factors influencing the determination of nitrate in soils,the effects of sample preservation method,extracting agent,analysis method,purity of water and chemical reagents on the determination of nitrate in three typical soils including black soil,alluvial soil and red soil,were investigated.The results showed that the cryopreservation method was better than the cold preservation for the collected soil samples.Analysis of nitrate in soils kept in freezing and cooling conditions should be finished within 45 d and 7 d,respectively.There were no significant difference between 0.01mol/L CaCl2 and 2 mol/L KCl used for extraction of nitrate.No significant difference was found in analyzed results between the standard method for forestry soils (LY/T 1230-1999) and the UV spetrophotometry,whereas values of UV spetrophotometry were significantly higher than that of the continuous flow injection analysis method,and an obvious correlation was found between them.The use of impure water would make results higher,techniques with respect to boiling,distillation,and distillation for ammonia removal of water could eliminate the effect of impurity.关键词：nitrate;analysis method;influencing factor
- 2067
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发布时间： - 摘要：A sandwich aptamer-based chemiluminescence(CL) biosensor for sensitive determination of cocaine was developed based on magnetic microspheres as a special biomolecule immobilizing carrier.The experimental parameters,including amounts of magnetic microspheres,capture DNA,cocaine-binding aptamer,reporter DNA probes and dilution coefficient of SA-HRP were optimized .Under the optimized conditions,a good linear relationship was obtained between CL intensity and logarithms of cocaine concentration from 1.0×10-8mol/L to 1.0×10-4 mol/L (r2=0.989 7).The detection limit was 3.2×10-9 mol/L.To assess the CL aptasensors′ability to detect cocaine in complex samples, the specific recognition ability of cocaine aptasensors in the presence of human blood serum was also tested.The method showed a good selectivity.关键词：magnetic microspheres;aptamer;cocaine;chemiluminescence
- 1865
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- 940
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发布时间： - 摘要：A DNA sequence was designed as a specific probe for Hg2+ and a novel label-free fluorescent aptasensor was constructed with the help of the minor groove binding dye DAPI.In the absence of Hg2+，DNA folds into a stable stem-loop structure and DAPI inserts into the stem portion causing strong fluorescence emission,and in the presence of Hg2+,the configuration of DNA produces change and DAPI could release,which results in the decrease of fluorescence.The experiment results showed that the percentage of fluorescence decrease is proportionally correlated with concentration of Hg2+ at the optimal experimental conditions,and a good linear relationship was obtained even in the low concentration of 0.5-50 nmol/L.The actual detection limit is 0.5 nmol/L.With the advantages of short detection time and simple operation,the method has a potential application for the rapid real-time detection of Hg2+ in environmental water samples.关键词：the minor groove binding dye DAPI;fluorescence sensor;aptamer;Hg2+
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发布时间： - 摘要：A high performance liquid chromatography coupled with tandem mass spectrometric（HPLC-MS/MS) method was established to detect residues of 5 fruit preservatives including p-methyl hydroxybenzoate,p-ethyl hydroxybenzoate,2,4-dichlorobenzene oxygen ethanoic acid（2,4-D),ethyl naphthol and 4-phenyl phenol simultaneously.The samples were extracted with ether,then purified with activated carbon column,and separated on a C18 column by gradient elution using 50% methanol（A)-acetonitrile（B) as mobile phase.The calibration curves were linear between peak areas and concentrations of 5 preservatives in the range of 0.05-1.2 mg/L,with correlation coefficients more than 0.999.The limits of detection were in the range of 0.5 -2.0 μg/kg for five preservatives.The average recoveries ranged from 81.0% to 1045%,with RSDs of 1.3%-6.8%.The method was suitable for the analysis of the above preservatives in fresh fruits with advantages of rapidness,good sensitivity and accuracy.关键词：HPLC-MS/MS;fresh fruit;preservatives;residue
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- 2
发布时间： - 摘要：A method was developed for the simultaneous determination of CS2 and CCl4 at trace level in refined TiCl4 by headspace extraction/gas chromatography-quadrupole mass spectrometry(HS/GC-QMS).The optimal parameters including temperature and time for headspace extraction were explored and finally set to 85 ℃ and 20 min.GC separation was performed on a DB-1 MS capillary column with helium as carrier gas.In MS detection,the peak areas of ions at m/z 76 and m/z 117 were acquired in the scan mode of selected ion monitoring(SIM) for quantitative analysis of CS2 and CCl4,which were consistent with the peak area of ion at m/z 86 using n-C6H14 as the internal standard.The results showed that the calibration curves of CS2 and CCl4 were linear over the concentration range of 20-1 000 nL/L (volume concentration) with correlation coefficients of 0.999 8 for CS2 and 0.999 5 for CCl4，respectively.The lowest quantitation limits (LOQs)for CS2 and CCl4 were both 20 nL/L.The average recoveries of TiCl4 samples at four spiked levels of 20,50,200 and 1 000 nL/L were 102.2% for CS2 and 108.5% for CCl4 ,with RSDs of 1.3%-18.9%.The developed method was successfully applied in the residue analysis of CS2 and CCl4 in the refined TiCl4.The HS/GC-QMS method showed a good application prospect in the quality control of refined TiCl4.关键词：headspace extraction/gas chromatography-quadrupole mass spectrometry (HS/GC-QMS);refined TiCl4;CS2;CCl4;quantitative analysis
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发布时间： - 摘要：A gold nanoparticles/poly o-phenylenediamine modified glod electrode(nano-Au/POPD/Au) was prepared by consecutive cyclic voltammetry(CV) and the performances of different modified electrodes were studied in alkaline solution.The results showed that the nano-Au/POPD/Au electrode was highly active and stable for electrooxidation of formaldehyde,and its electrocatalytic current at the potential of 0.3 V was 2.1 times higher than that of nano-Au/Au electrode.Effects of various parameters such as nano-Au loding(sweep cycle and scan rate)，scan rate,NaOH concentration on the electrocatalytic oxidation of formaldehyde were also investigated.Under the optimum conditions,the calibration curve of formaldehyde was linear in the concentration range of 0.1-600 mg/L.The detection limit(S/N=3) was 0.01 mg/L.The method was applied in the determination of formaldehyde in red wine and skiphop children plastic dish,and the results were in agreements with those obtained by the standard acetylacetone method.关键词：formaldehyde;gold nanoparticle;poly o-phenylenediamine;electrocatalytic oxidation
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- 1052
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发布时间： - 摘要：The electrochemical behavior of Ibuprofen(IB) on the graphene/DNA/gold nanoparticles(Gr/DNA/GNPs) modified electrode was studied. The Gr/DNA/GNPs composites were characterized by UV-visible spectrophotometry and scanning electron microscopy techniques. The detection effects of different modified electrodes were compared,and effects of experimental conditions such as buffer system and modification amount on the determination were discussed. The results showed that,IB had a well defined electrochemical signal on Gr/DNA/GNPs composite modified electrode,and a sensitive oxidation peak could be observed at 0.83 V in 0.1 mol?L-1 PBS buffer solution (pH 6.8). Under the optimal conditions,the linear range of IB was in the range of 7.2×10-7-4.9×10-5mol?L-1,and the detection limit was 1.5×10-7mol?L-1.The interference test and repeated experiments showed that the modified electrode had a good selectivity and reproducibility,and was applied in the detection of IB in real samples with a satisfactory results.关键词：ibuprofen(IB);graphene/DNA/gold nanoparticles;electrochemistry;modified electrode
- 2088
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- 1125
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- 1
发布时间： - 摘要：A rapid analytical method based on solid phase extraction and ultra performance liquid chromatography（UPLC) was developed for the determination of 9 kinds of bisphenol diglycidyl ethers,including bisphenol A diglycidyl ether(BADGE) and its derivatives:BADGE?2H2O,BADGE?H2O,BADGE?2HCl,BADGE?HCl,BADGE?H2O?HCl,bisphenol F diglycidyl ether(BFDGE) and its derivatives:BFDGE?2H2O and BFDGE?H2O.The beverage samples were extracted twice by votex shaking with methyl tert-butyl ether.The extract was dried by a relax flow of nitrogen at 40 ℃.The residue was redissolved with methanol-water(2∶3) followed by cleaning up using PLS solid phase extraction.The target compounds were separated on a Shim-pack XR-ODS-Ⅲ column by gradient elution using acetonitrile - water as mobile phase.Under the optimized conditions,the calibration curves showed good linearity in the range of 0.05-10 mg/L.The recoveries at two spiked concentration levels ranged from 83.8% to 98.7%，with RSDs of 2.3%-5.6%.The limits of detection(LODs) for the target compounds were all 20 μg/kg.The method is sensitive and simple,and is suitable for the rapid determination of 9 kinds of bisphenol diglycidyl ethers in 10 min.关键词：canned beverage;bisphenol diglycidyl ether;solid phase extraction;ultra performance liquid chromatography（UPLC)
- 1995
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- 992
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- 5
发布时间： - 摘要：An effective method was established for the simultaneous determination of three kinds of organophosphorous flame retardants including tris-(2-chloroethyl)-phosphate(TCEP),tris-(1,3-dichlorepropyl)-phosphate(TDCP) and tris(chloro-2-propyl) phosphate(TCPP) in children’s toys,based on ultrasonic assisted extraction coupled with high performance liquid chromatography-mass spectrometry．Effects of extraction solvent type,extraction time and mobile phase on extraction efficiencies were investigated.The optimal conditions were as follows:extraction solvent:acetone,extraction time:25 min,mobile phase:water containing 0.05% formic acid-acetonitrile.Under the optimal conditions,the calibration curves were linear in the ranges of 1.0-500 μg/L for TCEP,10-500 μg/L for TCPP and 10-500 μg/L for TDCP,respectively,with correlation coefficients more than 0.997,The quantitation limits for TCEP,TCPP and TDCP were 0.5,8.0,6.0 μg/kg,respectively.The spiked recoveries varied from 83.4% to 98.9% with relative standard deviations of 4.0%-7.7%．The proposed method was successfully applied in the determination of organophosphorous flame retardants in commercially available toys including plastic children’s toys and stuffed children’s toy．The method developed is simple,rapid,sensitive and accurate,and could satisfy the demand for analysis of banned organpphosphorous flame retardants in children’s toys.关键词：ultrasonic-assisted extraction;high performance liquid chromatography- mass spectrometry;toy;organophosphorous flame retardants
- 1908
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- 1073
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- 7
发布时间： - 摘要：A NMR method was developed for the determination of vitamin B2（VB2） in vitamin B2 tablets.NMR determination conditions were as follows：the pulse sequence:cpmgpr1d，hydrogen spectral width:6 009 Hz，pulse width:11.95 μs，delay time:6.50 μs，temperature:27 ℃,number of scans:32.A good linear relationship was obtained between peak area ratio of VB2 to TSP and concentrations of VB2 in the range of 1.25-10 mg/mL.The regression equation was y=2.989 4 x+0.185 5（r2=0.999 2）.The average recovery was 83.2 %.The results indicated that the NMR based method had high sensitivity and good repeatability，and could be used in the determination of VB2 in vitamin B2 tablets.关键词：NMR;vitamin B2;quantification
- 1978
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- 1169
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- 8
发布时间： - 摘要：As a new class of two-dimensional nanomaterials，graphene has attracted considerable attention in recent years.Herein，the developments for determination of mycotoxin were introduced，and the grapheme-based methods for detection of mycotoxins in the last few years were reviewed.The new trends for the detection of mycotoxins were also put forword.关键词：graphene;mycotoxins;review
- 1849
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发布时间： - 摘要：With their unique physical and chemical properties,nanometer materials play a more and more important role in many fields of science，more attentions were paid for harmful pollutants in food,such as heavy metal,pesticide residue and veterinary drug residue,and harmful substances in packaging material，but the current method for determination of these harmful pollutants in food lacks of rapidness,sensitivity and economy.The applications of nanometer materials in analysis of these harmful pollutants in food have solved the problem and become the research focus of analytical chemistry.In this article,the basic characteristics of nanometer materials were described,and the category,source and harmfulness of the harmful pollutants in food were analyzed.Furthermore,the recent progress on the application of the nanometer materials in detection of these harmful pollutants in food was also summarized.关键词：nanometer material;food;harmful pollutant;application
- 1928
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- 988
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- 2
发布时间：
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