电感耦合等离子体光谱法测定磷尾矿浸出磷时防堵塞方法研究  

Research on anti-clogging method for determining leached phosphorus in phosphorus tailings by ICP-AES

作　　者：张江坤 甘海轩 彭桦 余慧茹 史鑫 ZHANG Jiangkun;GAN Haixuan;PENG Hua;YU Huiru;SHI Xin(Phosphorus Resources Development and Utilization Engineering Technology Research Center,Yunnan Phosphate Chemical Group Co.,Ltd.,Kunming 650600,China)

机构地区：[1]云南磷化集团磷资源开发利用工程技术研究中心,云南昆明650600

出　　处：《磷肥与复肥》2022年第6期38-39,52,共3页Phosphate & Compound Fertilizer

基　　金：国家重点研发计划项目子课题“战略性矿产选冶过程标准样品和质量监控体系研究与应用”(2021YFC2903102)。

摘　　要：利用电感耦合等离子体光谱法测定磷尾矿中磷时,制样后直接测定会因样品中钙盐、镁盐富集导致雾化器堵塞,造成分析结果波动较大。在弱酸性环境下,向样品中加入乙二醇二乙醚二胺四乙酸溶液,使样品中钙、镁离子部分或全部以可溶性离子存在,再利用电感耦合等离子体光谱法测定可达到减少堵塞、重现性好的目的。该方法相对标准偏差<2%,加标回收率在98.2%~105.0%,检出限低,方法简单可靠,易于推广。When the phosphorus in phosphorus tailings is determined by ICP-AES,the atomizer will be blocked due to the enrichment of calcium and magnesium salts in the sample,resulting in large fluctuations in the analysis results.In the weak acidic environment,EGTA solution is added to the sample to make some or all of the calcium and magnesium ions exist as soluble ions.The purpose of reducing blockage and good reproducibility can be achieved.The relative standard deviation of this method is less than 2%,the recovery rate of standard addition is98.2%-105.0%,the detection limit is low,the method is simple,reliable and easy to be popularized.

关 键 词：电感耦合等离子体光谱法 磷尾矿 浸出磷 防堵塞 

分 类 号：O657[理学—分析化学]