摘要
目的建立酸消解-电感耦合等离子体发射光谱法测试铝合金中铅、镉含量。方法铝合金样品使用盐酸-硝酸在加热板加热消解完全后,采用电感耦合等离子体发射光谱法测定样品溶液中铅、镉的含量。结果优化后雾化器流量(Neb)流速设定为0.6 L/min,通过使用基体匹配法来消除溶液中铝盐带来的光谱干扰。铅、镉元素仪器检出限分别为2.0 mg/kg、0.5 mg/kg,7次重复性相对标准偏差为3.14%~5.46%,加标回收率为97.6%~105.2%。分别对铝含量在80.00%~99.99%之间的样品进行加标回收测试,铅的回收率范围为106.9%~130.2%;镉的回收率范围为105.8%~110.6%。结论该方法快速、准确,适用于铝合金中铅、镉元素的测试。
Objective To establish a method for the determination of lead and cadmium content in aluminum alloys by acid digestion and inductively coupled plasma atomic emission spectrometry.Methods The aluminum alloy samples were digested by hydrochloric-nitric acid on a heating plate,the content of lead and cadmium in sample solution was determined by inductively coupled plasma emission spectrometry.Results The optimized Neb flow velocity was set at 0.6 L/min,and the spectral interference caused by aluminum salt in solution was eliminated by matrix matching method.The limits of detection of lead and cadmium were 2.0 mg/kg and 0.5 mg/kg,respectively.The relative standard deviations of 7 kinds of repetitions were 3.14%‒5.46%,and the recoveries were 97.6%‒105.2%.Samples with aluminum content ranging from 80.00%to 99.99%were subjected to spiked recovery tests,and the recoveries of lead were 106.9%‒130.2%;the recoveries of cadmium were 105.8%‒110.6%.Conclusion The method is rapid,accurate and suitable for the determination of lead and cadmium in aluminum alloys.
作者
万峰
代亚男
禄春强
WAN Feng;DAI Ya-Nan;LU Chun-Qiang(Institute of Quality Inspection of Light Industry&Chemical Products,Shanghai Institute of quality Inspection and Technical Research,Shanghai 201114,China)
出处
《实验室检测》
2023年第4期1-5,共5页
Laboratory Testing
基金
上海市科学技术委员会研发公共服务平台建设项目(14DZ2293000)
关键词
电感耦合等离子体发射光谱法
酸消解
铝合金
铅
镉
inductively coupled plasma atomic emission spectrometry
acid digestion
aluminium alloy
lead
cadmium
