扬州工业职业技术学院 化学工程学院,江苏 扬州 225127
金党琴,博士研究生,教授,研究方向:农药残留分析研究,E-mail:jindangqin@163.com
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金党琴,龚爱琴,王元有等.基于BiOI纳米片双识别型毒死蜱光电化学传感器的构建及应用研究[J].分析测试学报,2021,40(07):1031-1036.
JIN Dang-qin,GONG Ai-qin,WANG Yuan-you,et al.Research on Construction and Application of a Dual-recognition Photoelectrochemical Sensor for Chlorpyrifos Based on BiOI Nanosheets[J].Journal of Instrumental Analysis,2021,40(07):1031-1036.
金党琴,龚爱琴,王元有等.基于BiOI纳米片双识别型毒死蜱光电化学传感器的构建及应用研究[J].分析测试学报,2021,40(07):1031-1036. DOI: 10.3969/j.issn.1004-4957.2021.07.008.
JIN Dang-qin,GONG Ai-qin,WANG Yuan-you,et al.Research on Construction and Application of a Dual-recognition Photoelectrochemical Sensor for Chlorpyrifos Based on BiOI Nanosheets[J].Journal of Instrumental Analysis,2021,40(07):1031-1036. DOI: 10.3969/j.issn.1004-4957.2021.07.008.
以BiOI纳米片为载体,毒死蜱为模板分子,对巯基苯胺为功能单体,戊二醛为交联剂,采用电聚合法合成毒死蜱分子印迹聚合物膜,在印迹膜表面固定乙酰胆碱酯酶(AChE),对氯化乙酰硫代胆碱(ATCl)浓度、pH值进行优化,构建了双识别型光电化学传感器。采用电流-时间法(,I,-,t,)对水样中毒死蜱(CPF)进行检测,结果表明在最佳实验条件下(1.0 mmol/L ATCl,pH 7.0)峰电流强度与毒死蜱在0.02~1.0 nmol/L和20.0~200.0 nmol/L浓度范围内呈线性关系,线性方程分别为抑制率(%) = 49.253,C,CPF,+9.433(,r,2, = 0.998 6)和抑制率(%) = 0.193,C,CPF,+57.599(,r,2, = 0.999 1),检出限(,S,/,N, = 3)为0.005 nmol/L。该传感器对毒死蜱具有良好的选择性、重现性(RSD = 4.2%)和稳定性。方法用于水样中痕量毒死蜱的检测,测得加标回收率为96.1%~108%,相对标准偏差(RSD)为2.8%~4.2%。表明该传感器在复杂样品检测中具有良好的准确度和精密度。
A chlorpyrifos molecularly imprinted polymer membrane was synthesized by electropolymerization, with BiOI nanosheets as the carrier, chlorpyrifos as the template molecule, ,p,-mercaptoaniline as the functional monomer and glutaraldehyde as the crosslinking agent. Based on this, a dual-recognition photoelectrochemical sensor for chlorpyrifos(CPF)was constructed by immobilizing acetylcholinesterase(AChE) on the surface of the imprinted membrane. The current-time method (,I,-,t,) was used to detect chlorpyrifos in water samples.Acetylthiocholine chloride(ATCl) concentration and pH value were optimized. Results showed that,under the optimal experimental conditions(1.0 mmol/L ATCl,pH 7.0), the peak currents and chlorpyrifos concentrations were linear in the ranges of 0.02-1.0 nmol/L and 20.0-200.0 nmol/L. The linear equations were inhibition rate(%) = 49.253 ,C,CPF ,+ 9.433(,r,2, = 0.998 6) and inhibition rate(%) = 0.193 ,C,CPF, + 57.599(,r,2, = 0.999 1), respectively. The detection limit(,S,/,N, = 3) was 0.005 nmol/L. The sensor had a good selective recognition ability, reproducibility(RSD = 4.2%) and stability for chlorpyrifos. The method was successfully applied to the detection of trace chlorpyrifos in water samples, with spiked recoveries of 96.1% -108%, and RSDs of 2.8%-4.2%.
BiOI纳米片毒死蜱分子印迹乙酰胆碱酯酶(AChE)水样光电化学传感器
BiOI nanosheetschlorpyrifosmolecular imprintingacetylcholinesterase(AChE)water samplephotoelectrochemical sensor
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