Abstract
It was important to assess workplace air quality in factory where the air quality has a significant impact on the health of workers. This study aimed to determine the concentrations of metal elements in workplace air of factory. In this article, an easy and quick method based on microwave assisted acid digestion technique prior to quantification using inductively coupled plasma mass spectrometry (ICP-MS) for measuring contents of 7 metal (Cr, Mn, Ni, Cu, Pb, Cd and Sn) elements in workplace air. The air samples were collected by quartz filter membrane. The samples were respectively prepared by microwave digestion system and nitric acid. Under the optimum condition of method, the calibration curves were obtained with correlation correlation coefficients were above 0.9994, the limits of detection of the method were 0.004-0.072 mg/L. The average recoveries of the 7 metal elements at three levels were in the range of 93.8%-102.3%. The proposed method has some advantages of simple operation, high sensitivity and good accutacy.
Highlights
Accurate and precise analysis of samples is of crucial importance for clinical, environmental, nutritional, toxicological and forensic sciences [1]
Volumetry method and spectrophotometry methods are complicated and slow in analysis, flame atomic absorption spectrometry and graphite furnace atomic absorption spectrometry can be used for continuous analysis, but they are more suitable for the determination of single element. inductively coupled plasma mass spectrometry (ICP-MS) can be used to determine multiple elements at the same time, and has the advantages of low interference level, good precision and wide linear range
This paper describes a microwave digestion procedure adapted to small sample sizes using volume closed vials for determination of seven elements (Cr, Mn, Ni, Cu, Pb, Cd and Sn) at trace level by ICP-MS
Summary
Accurate and precise analysis of samples is of crucial importance for clinical, environmental, nutritional, toxicological and forensic sciences [1]. The detection methods of metal elements in the air of workplace mainly include volumetric method, flame atomic absorption spectrometry, graphite furnace atomic absorption spectrometry, spectrophotometry methods and so on. Inductively coupled plasma mass spectrometry (ICP-MS) can be used to determine multiple elements at the same time, and has the advantages of low interference level, good precision and wide linear range. Inductively coupled plasma mass spectrometry, a multi-elemental and highly sensitive analytical technique with wide dynamic ranges, has become the most appropriate technique for the determination of metal in workplace air [6]. To realize more scientific analysis of workplace air, in this experiment, closed microwave digestion samples were adopted to develope and validate ICP-MS method that enables simultaneous determination of 7 kinds elements in the industrial dusts, in the hope of providing experiment guidance and data reference for metal elements detection
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