单扫描极谱法测定尿中锰

目的探索用单扫描极谱法测定尿中锰的含量。方法在0．15mol／L酒石酸钾钠溶液、0．75mol／L亚硫酸钠溶液、7．0mol／L乙二胺溶液体系中，采用单扫描极谱法，锰在-1790mV处出现灵敏而清晰的波峰。结果其峰电流与锰的含量成正比，测定样品，结果显示相对标准偏差〈2％，加标回收率可达93．3％～98．0％。结论本法与磷酸-高碘酸法相比较，相对标准偏差〈3．5％，且本法体系稳定，选择性好，灵敏度高。

Measure Manganese Content in Urine by Single-scanning Polarography

Objective To probe into the method to measure the content of the manganese in urine by single-scanning polarography. Method Manganese appears a sensitive and clear wave crest at the - 1 790 mV in the aqua system with potassium sodium tartrate of 0. 15 mol/L and sodium sulfite of 0.75 mol/L and ethylene diamine of 7.0 mol/ L. Results The kurtosis became the direct proportion with the content of the manganese. Determination of samples showed that the relative standard deviation was 〈 2%. Increase recoveries up to 93.3%-98.0% Conclusion Compared with phosphoric acid - supernal iodic acid method, the standard deviation is 〈 3.5%. System of this method is stable, selectivity is good, and the sensitivity is high.