The dry ashing - AAS method and the microwave digestion -ICP-MS method for determination of lead in plastic packaging bag

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Mi, Haipeng^1 ; Zhou, Xilin^1 ; Liang, Bo^1 ; Su, Zhonghua^1 ; Huang, Qingqing^1 ; Liu, Di^1

Chongqing Academy of Metrology and Quality Inspection, Chongqing, China^1

关键词: Atomic absorption spectrophotometry;    Linear correlation coefficient;    Linear least-squares method;    Microwave digestion;    Microwave digestion method;    National standard;    Relative standard deviations;    X ray fluorescence spectroscopy;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/5/052024/pdf
DOI  :  10.1088/1755-1315/300/5/052024

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

A pink plastic packaging bag sample from a enterprise was preliminarily screened via X-ray fluorescence spectroscopy method (XRF), it was found that the lead content exceeded the limit of relevant national standards. Subsequently, the total lead content in the packaging bag was determined via atomic absorption spectrophotometry pretreated by dry ashing method (DA-AAS) and inductively coupled plasma-mass spectrometry with microwave digestion method (MD-ICP-MS), respectively. The working curve equations were obtained by linear least squares method with the calculated linear correlation coefficients r above 0.9998 and the relative standard deviation (RSD) of the determination results from 1.0% to 6.2%, which was in good agreement with the result of XRF.