摘要
本研究采用静态注射化学发光法,研究了Cd(II)对鲁米诺-Co(II)-H2O2发光体系的抑制现象,据此建立了Cd(II)的抑制化学发光测定法并应用于水中痕量隔的测定。研究结果表明,Co(II)对鲁米诺-H2O2体系的发光强度有明显增强作用,而Cd(II)对鲁米诺-Co(II)-H2O2体系的发光强度有抑制作用。进一步的研究表明在实验选定的最佳条件下,在Cd(II)浓度为1.0×10-7～5.0×10-6g/ml范围内,Cd(II)对鲁米诺-Co(II)-H2O2体系发光强度的抑制作用与Cd(II)浓度呈现较好的线性关系,检出限为3.2×10-8g/ml。该方法用于实际水样中Cd(II)的测定,结果令人满意。同时,对本反应做了进一步研究,提出了可能的反应机理。
Inhibitory function of luminol-Co（Ⅱ）-H2O2 chemiluminescence by Cd（Ⅱ） was studied in this research using staticstate-injection chemiluminescence, and it was applied to determine Cd（Ⅱ） in water. The results indicated that Co（Ⅱ） enhanced the chemiluminescence intensity of luminol-H2O2, while Cd（Ⅱ） restrained the chemiluminescence intensity of luminol-Co（Ⅱ）- H2O2. Further research indicated that the restraint of luminol-Co（ Ⅱ ）-H2O2 chemiluminescence by Cd（Ⅱ） had a relationship with the concentration of Cd（Ⅱ） in water. The linear range is 1.0 × 10^-7-5.0 × 10^-6 g/ml. The limit of detection is 3.2 × 10^-8 g/ml. The method was applied to the determination of Cd（Ⅱ） in water and satisfactory result was obtained. Meanwhile, the possible reaction mechanism was put forward based on the further study.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2007年第7期388-392,共5页
Food Science
基金
华中农业大学引进人才项目(2003032)
关键词
化学发光
镉
抑制作用
反应机理
chemiluminescence
cadmium
inhibitory function
reaction mechanism
