Wang Zheng, Wang Xiaowei, Xue Ying, Zhao Rong, Luo Rencai, Chen Dong
Beijing Centers for Preventive Medical Research, Beijing 100013, China.
Wei Sheng Yan Jiu. 2017 Jul;46(4):640-644.
To developed a method for rapid visual and colorimetric detection of trace high toxicity element mercury( Hg~(2+)) in natural mineral water via coupling cloud-point extraction with gold nanoparticle probe.
The concentration of Hg(2+)was quantified via the color degree of the Triton X-114 phase. The functionalized gold nanoparticle probe was synthesized and purified. 200 μL gold nanoparticle probe was added into 10 mL water sample( pH 7. 5), coupled with 400 μL, 5 % Triton X-114 solution. The Hg(2+) in water could be qualitative and quantitative analyzed according the color by naked eye or colorimetric determination.
Under the optimized condition, the detection limit was 5 μg/L Hg~(2+)in aqueous solution by naked eye. The proposed method has a linear range of 0-50 μg/L, a correlation coefficient( r)of 0. 9945, and a detection limit of 1. 8 μg/L for colorimetric determination. The results determined by the colorimetric method were excellent agreed with the concentrations determined by inductively coupled plasma mass spectrometry method.
This result indicated that the proposed method is convenience, sensitive and can be applied in the rapid, on site detection of Hg~(2+)in mineral water.
建立一种通过浊点萃取与金纳米粒子探针联用快速可视化比色检测天然矿泉水中痕量高毒性元素汞（Hg²⁺）的方法。
通过Triton X - 114相的色度对Hg²⁺浓度进行定量。合成并纯化功能化金纳米粒子探针。将200 μL金纳米粒子探针加入10 mL水样（pH 7.5）中，再加入400 μL 5% Triton X - 114溶液。水中的Hg²⁺可通过肉眼比色或比色测定进行定性和定量分析。
在优化条件下，肉眼检测水溶液中Hg²⁺的检出限为5 μg/L。该方法线性范围为0 - 50 μg/L，比色测定的相关系数（r）为0.9945，检出限为1.8 μg/L。比色法测定结果与电感耦合等离子体质谱法测定浓度高度吻合。
该结果表明所提方法简便、灵敏，可应用于矿泉水中Hg²⁺的快速现场检测。
