电感耦合等离子体发射光谱法同时测定硫酸钾镁肥中钙、镁、钠  

Simultaneous determination of calcium,magnesium and sodium in potassium magnesit sulfatefertilizer by ICP

作　　者：赵枝刚 程金莲 张淑琴 刘宏 王兴权 ZHAO Zhigang;CHENG Jinlian;ZHANG Shuqin;LIU Hong;WANG Xingquan(Haixizhou Salt Chemical Products Quality Inspection and Test Center,Golmud 816099,China;Qinghai Normal University,Xining 810000,China)

机构地区：[1]海西州盐化工产品质量检验检测中心,青海格尔木816099 [2]青海师范大学,青海西宁810000

出　　处：《磷肥与复肥》2023年第4期36-39,共4页Phosphate & Compound Fertilizer

基　　金：国家市场监督管理总局科技计划项目(2021MK112)。

摘　　要：硫酸钾镁肥经硝酸-高氯酸消解后,采用电感耦合等离子体发射光谱法同时测定钙、镁和钠含量,对分析谱线、溶样方式等进行优化。该方法钙、镁、钠检出限分别为0.000 5、0.009 0、0.030 0 mg/L,7次测定结果相对标准偏差为1.30%~4.69%,加标回收率在90.0%~98.5%,测定结果与GB/T 19023—2003仲裁法一致,具有较高的准确性和可靠性,且前处理简单、操作容易、试剂消耗少、人为主观因素影响小,实现一种方法同时测定钙、镁、钠含量,能满足大批量硫酸钾镁肥中钙、镁、钠含量测定要求。The contents of calcium,magnesium and sodium in potassium magnesium sulfate fertilizer are simultaneously determined by ICP after digested by nitric acid and perchloric acid.The selection of sample analysis spectral lines and sample dissolution methods are studied.The detection limit of calcium,magnesium and sodium in this method are 0.0005 mg/L,0.0090 mg/L and 0.0300 mg/L.The maximum relative standard deviation of the seven determinations is 1.30%-4.69%,and the recovery rate is between 90.0%-98.5%;The determination results are consistent with the arbitration method in GB/T 19023-2003.This method has high accuracy and reliability,and has the advantages of simple pretreatment,easy to operate,less reagent consumption,and less influence of human subjective factors.It can meet the simultaneous determination of calcium,magnesium and sodium contents in large quantities of potassium magnesium sulfate fertilizer.

关 键 词：硫酸钾镁肥 电感耦合等离子体发射光谱法 钙 镁 钠 测定 

分 类 号：TQ440.72[化学工程—化学肥料工业]