Preconcentration of diazinon using multiwalled carbon nanotubes as solid-phase extraction adsorbents
Preconcentration of diazinon using multiwalled carbon nanotubes as solid-phase extraction adsorbents
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DOI：
10.1016/j.microc.2007.10.002
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发表时间：
2008-02-01
影响因子：
4.8
通讯作者：
Ohta, Kiyohisa
中科院分区：
文献类型：
--
作者：
Katsumata, Hideyuki;Matsumoto, Tomohiro;Ohta, Kiyohisa
建立了一种灵敏、选择性的柱吸附方法，用于二氮农的预富集和测定。以多壁碳纳米管(MWCNTs)为吸附剂，预富集二氮农，采用高效液相色谱(HPLC法)测定。考察了影响分析物回收率的几个参数。实验结果表明，当溶液pH值为6时，用含有2mg二氮磷和5mL乙腈的200mL确认液作为洗脱液可以获得定量分析结果。在最佳条件下，二氮农的回收率为95.2+/-4.2%，7次测定的相对标准偏差为4.9%。当取样量为1000mL时，二氮磷的最大预富集系数为200。标准曲线的线性范围为0.997.3~10,000 ng m L(-1)，相关系数为0.2%，检出限(3S/N)为0.0 6 ng m L(-1)。该方法用于自来水中二氮磷的测定，具有较高的精密度和准确度。(C)2007 Elsevier B.V.保留所有权利。
A sensitive and selective column adsorption method is proposed for the preconcentration and determination of diazinon. Diazinon was preconcentrated on multiwalled carbon nanotubes (MWCNTs) as an adsorbent and then determined by high-performance liquid chromatography (HPLC). Several parameters on the recovery of the analyte were investigated. The experimental results showed that it was possible to obtain quantitative analysis when the solution pH was 6 using 200 mL of validation Solution containing 2 mu g of diazinon and 5 mL of acetonitrile as an eluent. Recovery of diazinon was 95.2 +/- 4.2% with a relative standard deviation for seven determinations of 4.9% under optimum conditions. The maximum preconcentration factor was 200 for diazinon when 1000 mL of sample solution volume was used. The linear range of calibration curve was 0.3 to 10,000 ng mL(-1) with a correlation coefficient of 0.997 and the detection limit (3S/N) was 0.06 ng mL(-1). The proposed method was successfully applied to the determination of diazinon in tap water with high precision and accuracy. (C) 2007 Elsevier B.V. All rights reserved.