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纳米银比色法快速检测三价铬离子
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作者单位
操江飞,韦寿莲,陈淼鑫 肇庆学院环境与化学工程学院 
基金项目:肇庆市科技计划项目(2018N017)
中文摘要:利用甲基紫含N供电子配位原子,可通过桥联作用和配位反应吸附于纳米银表面,而Cr3+的引入导致纳米银溶胶发生团聚现象,且溶液的颜色由亮黄色变成灰红色,从而建立了测定痕量Cr3+的比色法。在优化条件下,Cr3+的线性范围为2.0~10.0 μmol·L-1,r=0.997 6,裸眼检出限为0.3 μmol·L-1。方法用于环境中Cr3+的检测,回收率为93.2%~100%,相对标准偏差(RSD)小于1.5%。该方法具有快速、灵敏、选择性好等优点。
中文关键词:纳米银  三价铬离子  甲基紫  比色检测
 
Rapid Detection of Cr(Ⅲ) by Silver Nanoparticles Colorimetry
Abstract:A colorimetric method for the detection of traces of Cr(Ⅲ) was established by adsorbing methyl violet with N electron donor coordinating atoms on the surface of silver nanoparticles through bridging action and coordinate reaction,then the adding of Cr(Ⅲ) in the solution could lead to the precipitation phenomenon of silver nanoparticles sol,and followed by the solution color changing from bright yellow to grey red.Under the optimized conditions,the linear range for Cr(Ⅲ) was 2.0-10.0 μmol·L-1(r=0.997 6) and the detection limit for naked eye was 0.3 μmol·L-1.This method was applied in the determination of Cr(Ⅲ) in environmental samples,with recoveries of 93.2%-100% and relative standard deviations(RSD) less than 1.5%.It was rapid,sensitive and selective.
Key Words:silver nanoparticles  Cr(Ⅲ) ions  methyl violet  colorimetric detection
引用本文:操江飞,韦寿莲,陈淼鑫.纳米银比色法快速检测三价铬离子[J].分析测试学报,2019,38(10):1270-1274.
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