【摘要】 采用分光光度法检测矿物源腐植酸肥料中可溶性腐植酸含量,讨论在检测过程中样品的称取质量、离心条件、重铬酸钾浓度以及氧化时间对检测结果的影响。进行了方法验证,计算出方法检出限为4.27%,相对标准偏差为2.1%～11.6%,加标回收率为95%～106%。更多还原

【Abstract】 The content of soluble humic acid in mineral humic acid fertilizer was determined by spectrophotometry.The influence of sample weight,centrifugation conditions,concentration of potassium dichromate and oxidation time on the test results were discussed.The detection limit of the method is calculated as 4.27%,and the relative standard deviation is 2.1% ～ 11.6%.The recovery rate of standard material is 95% ～ 106%.更多还原