摘要
对微波消解ICP-AES(电感耦合等离子体原子发射光谱法)测定电子电器产品中Pb、Cd、Hg、Cr的方法进行了初步研究,以期为准确检测电子电器中重金属类有害物质的分析方法提供参考。结果表明,所采用的微波消解法对欧洲标准参考物质中Pb、Cd、Hg、Cr的回收率分别为93%、86%、89%和90%。多因素实验所确定的最佳工作参数为功率1.2kW,等离子气流量15L/min,雾化气压200kPa,观察高度10mm。此条件下Pb、Cd、Hg、Cr的加标回收率均在95%～103.3%之间,测定相对偏差小于0.1,相对标准偏差小于1.5%,元素检出限低。
This paper takes as its aim to optimize the methods for measuring and testing the content of heavy metals in the general electric and electronic appliances and devices, such as that of Pb, Cd, Hg and Cr by means of microwave digestion protesting and ICP-AES （Inductively Coupled Plasma Atomic Emission Spectrometry） testing and measurements. Based on some single factor experiments, we have conducted a series of multi-factor experiments in hoping to optimize the working parameters. At the same time, some multi-factor experiments have also been done to test the best parameters with the devices and appliances acquired from abroad and detect the following data： power： 1.2 kW, gas flow rate of plasma： 15 L/rain, the atomization pressure force： 200 kPa, the observed altitude： 10 mm. Under the above conditions, the added sign of the recovery-rates of the four elements were found to range between 95 % - 103.3 % , with the relative deviation accounted for smaller than 0.1 and the relative standard deviation-smaller than 1.5 % . It was also found that the element out-pick limits could achieve a level of μg/kg. Compared between AAS and ICP-AES, we have detected that the detected ICP- AES was advantageous in a few ways. The results of our study indicate that the recovery rates of Pb, Cd, Hg and Cr in the European standard reference parameters can be as high as 93%, 86% , 89% and 90% respectively after the necessary microwave digestion. The measuring results of the content of the above four elements in the general electric and electronic appliances and devices by the microwave digestion pretreatment have gained ideal accuracy and precision. Thus, it can be said that the method we have developed is advantageous in reducing environmental pollution, low cost, and enhanced working efficiency. It can also be concluded that the method is feasible for pretesting the content of Pb, Cd, Hg and Cr in the above said appliances and devices .
出处
《安全与环境学报》
CAS
CSCD
2007年第4期66-68,共3页
Journal of Safety and Environment
关键词
环境工程
微波消解
ICP-AES
铅
镉
汞
铬
environmental engineering
microwave digestion
ICP- AES
Pb
Cd
Hg
Cr
