鱼体中痕量锌、锰、硒的极谱吸附波连续测定

Continuous Deterinination of Trace Zinc,Manganese and Selenium(Ⅳ)in Fish Samples by Adsorptive Polarographic Wave

提出了在酒石酸盐－乙二胺－高氯酸－亚硫酸钠－高碘酸钾－ＥＤＴＡ体系中连续测定Ｚｎ￣（２＋）、Ｍｎ￣（２＋）和Ｓｅ（Ⅳ）的极谱吸附波的方法，所得波峰敏锐、波形良好。当Ｚｎ￣（２＋）的浓度在０．４０～４０μｇ／Ｌ、Ｍｎ￣（２＋）的浓度在１．６～８．０μｇ／Ｌ、Ｓｅ（Ⅳ）的浓度在０．０２～３．３μｇ／Ｌ内，浓度与峰电流呈线性关系。对含７．８２ｍｇ／ＬＺｎ￣（２＋）、０．５３３ｍｇ／ＬＭｎ￣（２＋）、０．１５０ｍｇ／ＬＳｅ（Ⅳ）的真鲷鱼样的消化液进行测定，相对标准偏差分别为７．５％、９．６％和５．３％。

Continuous determination of the adsorptive polarographic wave of Zinc,Man-ganese and Selenium (Ⅳ) in Tartrate-Diaminoethane-Perchloric acid-Sodium sulphite-Potassium peri-odidate -EDTA system is given. The wave peaks obtained are sharp. When the concentration rangeswithin 0. 4￣40 μg/1 Zn￣(2+), 1. 6～80 μg/1 Mn￣(2+) and 0. 02～3. 3μg/1 Se(Ⅳ) ,it is liniear with thepeak height. For a larvea of Pagrosomus major containing 7. 82 mg/1 Zn￣(2+) , 0. 533 mg/1 Mn￣(2+) and0. 1 50 mg/L Se( Ⅳ ) , the coefficients of variation are 7. 5% , 9. 6% and 5. 3% , respectively.