【摘 要】
：
制备二乙基二硫代氨基甲酸银(DDTCAg)修饰电极,并运用该电极建立了测定硒(IV)测定新方法。实验表明,DDTCAg修饰电极在Cl--Se(IV)体系中产生一对灵敏的氧化还原峰,pH4.56缓冲
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制备二乙基二硫代氨基甲酸银(DDTCAg)修饰电极,并运用该电极建立了测定硒(IV)测定新方法。实验表明,DDTCAg修饰电极在Cl--Se(IV)体系中产生一对灵敏的氧化还原峰,pH4.56缓冲溶液中,固定Cl-浓度为8.0mmol/L,记录-1.0～1.0V循环伏安曲线,其氧化峰电流与硒浓度在1～35μg/L范围内呈良好线性关系,r=0.9946,检出限为0.2μg/L。成功用于富硒大米中硒含量的测定。
Preparation of silver diethyldithiocarbamate (DDTCAg) modified electrode, and the use of the electrode to establish a determination of selenium (IV) Determination of new methods. The results showed that the DDTCAg modified electrode produced a pair of sensitive redox peaks in the Cl - Se (IV) system. In pH4.56 buffer solution, the fixed Cl - concentration was 8.0mmol / L, and the cyclic voltammogram of -1.0 ~ 1.0V was recorded On the curve of AN, the peak current of the oxidation peak shows a good linear relationship with the concentration of selenium in the range of 1 ~ 35μg / L, r = 0.9946 with the detection limit of 0.2μg / L. Successfully used in the determination of selenium content in selenium-enriched rice.
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