分光光度法测定大量元素水溶肥料中缩二脲含量的改进  

Improvement of Spectrophotometric Method for Determining the Content of Biuret in Water-soluble Fertilizers Containing a Large Number of Elements

作　　者：董晶晶 Dong Jingjing(Shanxi Research Institute of Applied Chemistry,Shanxi Quality Supervision and Inspection Station of Fertilizer and Pesticide Product,Taiyuan Shanxi 030027,China)

机构地区：[1]山西省应用化学研究所山西省化肥农药产品质量监督检验站,山西太原030027

出　　处：《山西化工》2024年第10期102-104,共3页Shanxi Chemical Industry

摘　　要：本文利用无水乙醇和无水碳酸钠对大量元素水溶肥料样品前处理方法进行改进,采用分光光度法测定其缩二脲含量,对方法的可行性、精密度和准确度进行了分析。实验结果表明,通过无水乙醇和无水碳酸钠处理样品的方法在测定缩二脲含量上可行,具有良好的准确度和精密度,尤其针对含有中量元素的大量元素水溶肥料,操作简便的同时能够有效地消除中量元素对比色结果的影响。In this article,anhydrous ethanol and anhydrous sodium carbonate were used to improve the pretreatment method of water-soluble macronutrient fertilizers samples.The biuret content was determined by spectrophotometry.The feasibility,precision and accuracy of the method were analyzed.The experimental results show that the method of treating samples with anhydrous ethanol and anhydrous sodium carbonate is feasible for the determination of biuret content,with good accuracy and precision,especially for water-soluble macronutrient fertilizers.It is easy to operate and can effectively eliminate the influence of medium elements on the color results.

关 键 词：分光光度法 大量元素水溶肥料 缩二脲 

分 类 号：O657.32[理学—分析化学] S14-33[理学—化学]