摘要
采用凯氏定氮法、磷钼酸喹啉容量法、ICP—AES法分别分析腐植酸复合肥的氮、磷、钾含量。研究结果表明，在添加不同酸时，应使盐酸的离子浓度大于硫酸的离子浓度，从而消除硫酸盐对磷分析的影响；待测液的酸度控制在1．0～1．6mol／L为较适宜条件。方法具有良好的准确度和精密度，适用于腐植酸复合肥中氮、磷、钾的精确分析。
The content of nitrogen, phosphorus and potassium in humic acid compound fertilizer were analyzed by Kjeldahl method, molybdophosphoric acid and quinoline volumetric procedure, and ICP - AES, respectively. The research results indicated that the influence of sulphate on the analysis of phosphorus could be eliminated when the concentration of C1- was more than that of SO4 2- as using different acid. The feasible condition for the control of acidity of the solution was 1.0 - 1.6 mol/L. Owing to favorable accuracy and precision, the methods were especially suitable for accurate determination of humic acid compound fertilizer.
出处
《化学分析计量》
CAS
2010年第6期29-32,共4页
Chemical Analysis And Meterage
基金
中国科学院过程工程研究所知识创新工程前瞻性项目(062702)
关键词
腐植酸复合肥
凯氏定氮法
磷钼酸喹啉容量法
ICP—AES
humic acid compound fertilizer, Kjeldahl method, molybdophosphoric acid and quinoline volumetric procedure, ICP- AES（ inductively coupled plasma atomic emission spectrometer）
