采用电感耦合等离子体原子发射光谱(ICP-AES)法同时测定工业废水中铅、镉、铬和砷.对仪器的工作参数和被测元素的分析谱线进行了优化和选择.方法的检出限依次为0.008,0.002,0.007,0.015 mg·L-1.在质量浓度为0.489 mg·L-1(Pb),0.086 6 mg·L-1(Cd),0.231 mg·L-1(Cr)及0.395 mg·L-1(As)的水平上按试验方法测定8次,作了精密度试验,测得相对标准偏差值依次为1.71%,1.22%,0.95%及1.40%.在两个废水样品的基础上作了加标回收试验,所得结果在95.4%~104.6%之间.

ICP-AES was applied to simultaneous determination of Pb,Cd,Cr and As in industrial waste water.Working conditions of the instrument and choice of analytical spectral lines for the elements were tested and optimized.Values of detection limit were found to be 0.008,0.002,0.007,0.015 mg·L-1 for Pb,Cd,Cr and As respectively.Precision of the method were tested at the concentration levels of 0.489 mg·L-1 (for Pb),0.086 6 mg·L-1 (for Cd),0.231 mg·L-1 (for Cr) and 0.395 mg·L-1 (for As) for 8 determinations,and values of RSD′s obtained were 1.71%,1.22%,0.95% and 1.40% respectively.Tests for recovery were made by the standard addition method on the base of 2 waste water samples,values of recovery found were in the range from 95.4% to 104.6%.