Hu Shangwei, Liu Weibing, Huang Yuming, Shu Weiqun, Cao Jia
College of Chemistry and Chemical Engineering, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments (Ministry of Education), Southwest University, Chongqing 400715, People's Republic of China.
Luminescence. 2006 Jul-Aug;21(4):245-50. doi: 10.1002/bio.914.
A strong chemiluminescence (CL) response is observed when potassium permanganate solution is injected into basic luminol solution. When the CL reaction terminates, subsequent injection of Hg2+ solution into the reaction mixture results in a new CL reaction. Based on the post-catalytic enhancement effect of Hg2+ on the potassium permanganate-luminol system in basic media, a fast and simple CL-coupled flow injection analysis for the determination of Hg2+ was developed. In optimum conditions, CL intensity is proportional to Hg2+ concentration over the range 1.0 x 10(-8)-1.0 x 10(-5) g/mL, with a detection limit of 2.0 x 10(-9) g/mL. The relative standard deviation (RSD) is 3.6% for 1.0 x 10(-7) g/mL Hg2+ (n = 11). After pretreatment with sulphydryl cotton fibre, environmental water samples were analysed by the proposed method for total mercury determination with satisfactory results. The results were in good agreement with those given by hydride generation-cold vapour atomic absorption spectrometry (HG-CVAAS).
当将高锰酸钾溶液注入碱性鲁米诺溶液中时，会观察到强烈的化学发光（CL）响应。当CL反应终止后，向反应混合物中随后注入Hg2+溶液会引发新的CL反应。基于Hg2+在碱性介质中对高锰酸钾-鲁米诺体系的后催化增强作用，开发了一种快速简便的CL耦合流动注射分析法用于测定Hg2+。在最佳条件下，CL强度在1.0×10(-8)-1.0×10(-5) g/mL范围内与Hg2+浓度成正比，检测限为2.0×10(-9) g/mL。对于1.0×10(-7) g/mL的Hg2+（n = 11），相对标准偏差（RSD）为3.6%。经巯基棉纤维预处理后，采用该方法对环境水样中的总汞进行分析，结果令人满意。结果与氢化物发生-冷蒸气原子吸收光谱法（HG-CVAAS）给出的结果高度一致。
