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固化浮动有机滴微萃取-电热原子吸收光谱法测定各种样品中的痕量铅

Solidified Floating Organic Drop Microextraction for the Detection of Trace Amount of Lead in Various Samples by Electrothermal Atomic Absorption Spectrometry.

作者信息

Aydın Urucu Oya, Dönmez Şeyda, Kök Yetimoğlu Ece

机构信息

Department of Chemistry, Marmara University, Göztepe, 34722 Istanbul, Turkey.

出版信息

J Anal Methods Chem. 2017;2017:6268975. doi: 10.1155/2017/6268975. Epub 2017 Jul 20.

DOI:10.1155/2017/6268975
PMID:28808599
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5541831/
Abstract

A novel method was developed for determination of trace amounts of lead in water and food samples. Solidified floating organic drop microextraction was used to preconcentrate the lead ion. After the analyte was complexed with 1-(2-pyridylazo)-2-naphthol, undecanol and acetonitrile were added as extraction and dispersive solvent, respectively. Variables such as pH, volumes of extraction and dispersive solvents, and concentration of chelating agent were optimized. Under the optimum conditions, the detection limit of Pb (II) was determined as 0.042 g L with an enrichment factor of 300. The relative standard deviation is <10%. Accuracy of the developed procedure was evaluated by the analysis of certified reference material of human hair (NCS DC 73347) and wastewater (SPS-WW2) with satisfactory results. The developed procedure was then successfully applied to biscuit and water samples for detection of Pb (II) ions.

摘要

开发了一种测定水和食品样品中痕量铅的新方法。采用固化浮动有机滴微萃取法对铅离子进行预富集。在分析物与1-(2-吡啶偶氮)-2-萘酚络合后，分别加入十一醇和乙腈作为萃取剂和分散剂。对pH值、萃取剂和分散剂的体积以及螯合剂浓度等变量进行了优化。在最佳条件下，铅(II)的检测限为0.042 μg/L，富集倍数为300。相对标准偏差<10%。通过分析人发标准物质(NCS DC 73347)和废水标准物质(SPS-WW2)对所开发方法的准确性进行了评估，结果令人满意。所开发的方法随后成功应用于饼干和水样中铅(II)离子的检测。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6b17/5541831/fdf687091ef6/JAMC2017-6268975.005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6b17/5541831/d7b3e5f32dfa/JAMC2017-6268975.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6b17/5541831/d758fe41340d/JAMC2017-6268975.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6b17/5541831/4fafd9e23be5/JAMC2017-6268975.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6b17/5541831/1b9eb0af40e3/JAMC2017-6268975.004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6b17/5541831/fdf687091ef6/JAMC2017-6268975.005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6b17/5541831/d7b3e5f32dfa/JAMC2017-6268975.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6b17/5541831/d758fe41340d/JAMC2017-6268975.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6b17/5541831/4fafd9e23be5/JAMC2017-6268975.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6b17/5541831/1b9eb0af40e3/JAMC2017-6268975.004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6b17/5541831/fdf687091ef6/JAMC2017-6268975.005.jpg

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