1.江西省农业科学院 农产品质量安全与标准研究所,江西 南昌 330200
2.江西省农产品 质量安全重点实验室,江西 南昌 330200
张大文,博士,研究员,研究方向:农产品质量安全,E-mail:zdw3296@163.com
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邱素艳,俞熙仁,董一帆等.基于聚乙烯吡咯烷酮功能化磁性氧化石墨烯固相萃取鸡饲料中Cu(II)、Zn(II)、Cr(III)、Cd(II)和Pb(II)离子[J].分析测试学报,2022,41(02):242-248.
QIU Su-yan,YU Xi-ren,DONG Yi-fan,et al.Solid-phase Extraction of Cu(Ⅱ),Zn(Ⅱ),Cr(Ⅲ),Cd(Ⅱ) and Pb(Ⅱ) Ions in Chicken Feed Based on Polyvinylpyrrolidone Functionalized Magnetic Graphene Oxide[J].Journal of Instrumental Analysis,2022,41(02):242-248.
邱素艳,俞熙仁,董一帆等.基于聚乙烯吡咯烷酮功能化磁性氧化石墨烯固相萃取鸡饲料中Cu(II)、Zn(II)、Cr(III)、Cd(II)和Pb(II)离子[J].分析测试学报,2022,41(02):242-248. DOI: 10.19969/j.fxcsxb.21050603.
QIU Su-yan,YU Xi-ren,DONG Yi-fan,et al.Solid-phase Extraction of Cu(Ⅱ),Zn(Ⅱ),Cr(Ⅲ),Cd(Ⅱ) and Pb(Ⅱ) Ions in Chicken Feed Based on Polyvinylpyrrolidone Functionalized Magnetic Graphene Oxide[J].Journal of Instrumental Analysis,2022,41(02):242-248. DOI: 10.19969/j.fxcsxb.21050603.
该文制备了聚乙烯吡咯烷酮(PVP)功能化的磁性氧化石墨烯(PVP/Fe,3,O,4,/GO)复合物,透射电镜和红外光谱结果显示,其表面含有大量的结合位点,可显著提高萃取效率。该复合物对Cu(Ⅱ)、Zn(Ⅱ)、Cr(Ⅲ)、Cd(Ⅱ)和Pb(Ⅱ)离子有强吸附作用,最大吸附容量分别为68.03、103.63、13.82、36.51、555.56 mg/g,其对Pb(Ⅱ)离子的吸附作用尤为强烈;吸附和解吸过程仅需20 min。将上述材料应用于上述5种重金属离子的萃取,并采用火焰原子吸收光谱仪检测,其检出限为0.021~3.46 μg/L,与文献报道的检出限相当,且其它共存金属离子无明显干扰。该方法成功应用于3种鸡饲料中上述重金属离子的快速萃取,回收率为80.0%~120%,检测结果与微波消解法具有较高的一致性,相对误差为-18.73%~7.50%。该方法萃取速度快、耗时短、易分离、强酸用量小、对环境友好,在饲料重金属离子现场快速前处理领域有着较高的应用潜力。
The polyvinylpyrrolidone functionalized magnetic graphene oxide(polyvinylpyrrolidone/Fe,3,O,4,/graphene oxide,PVP/Fe,3,O,4,/GO)composites were prepared in this paper.The results of transmission electron microscopy and infrared spectroscopy showed that there were a lot of binding sites on the surface of the composites,which could greatly improve the extraction efficiency.The PVP/Fe,3,O,4,/GO composites exhibited a strong adsorption ability towards Cu(Ⅱ),Zn(Ⅱ),Cr(Ⅲ)and Cd(Ⅱ)ions,especially for Pb(Ⅱ)ions.The maximum adsorption capacities were 68.03,103.63,13.82,36.51 and 555.56 mg/g,respectively.The adsorption and desorption process only took 20 min. In the extraction experiment,the concentrations of Cu(Ⅱ),Zn(Ⅱ),Cr(Ⅲ),Cd(Ⅱ) and Pb(Ⅱ) ions were detected by flame atomic absorption spectrometry.It was found that the limits of detection ranged from 0.021 to 3.46 μg/L,which were comparable to those reported in previous literatures.Furthermore,the other coexisting metal ions showed no significant interference to the proposed method.Besides,the proposed method was successfully used for the rapid extraction of 5 metal ions in three kinds of chicken feed samples.The recoveries were in the range of 80.0%-120%,and the results showed a good consistency with those of microwave digestion method.The relative errors were in the range of -18.73%-7.50%.Therefore,the proposed method displayed a high application potential in the extraction of heavy metal ions in feed due to its superiorities,such as high extraction rate,timesaving,easy separation,low acid consumtion and environment-friendly.
磁性固相萃取聚乙烯吡咯烷酮功能化磁性氧化石墨烯重金属离子鸡饲料
magnetic solid phase extractionpolyvinylpyrrolidone functionalized magnetic graphene oxidesheavy metal ionschicken feed
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