二苯卡巴肼分光光度法对有机-无机复混肥料中铬含量测定的研究

Study of Determination of Chromium Content in Organo-Mineral Compound Fertilizers by Diphenyl Carbazide Spectrophotometry

铬是有机 -无机复混肥料中的有害元素之一 ,我国尚未制定有机 -无机复混肥料中铬含量测定的标准。本文探索了采用二苯卡巴肼分光光度法测定铬含量的条件 ,并通过精密度、回收率和不同方法的比较试验 ,表明该方法对有机 -无机复混肥料中铬含量的测定是可行的 ,也是可靠的 ,为以后制定相应的国家标准打下了基础。

Chromium is one of the harmful elements in organo mineral compound fertilizers, but China has not yet drawn up a standard for the determination of the chromium content in organo mineral compound fertilizers. The author investigates the conditions for the determination of chromium content by diphenyl carbazide spectrophotometry and, by carrying out comparative tests on different methods, recovery and precision, shows that the method proposed for the determination of the chromium content in organo mineral compound fertilizers is feasible and reliable, thus laying a foundation for the formulation in future of the relevant state standard.