ICP-MS Determination of 12 Metal Elements in Laboratory Air by Condensation Collection
To evaluate the safety of metal element in laboratory ambient air,an accurate and efficient test method is developed.The condensed ice formed during vaporization of high purity liquid argon is used as sample carrier to determine the concentration of 12 kinds of metal elements in condensed ice by inductively coupled plasma mass spectrometer(CP-MS).A condensing collection ICP-MS method for the determination of metal elements in laboratory air is established.The condensation collection rates of the method are 70.8%～85.8%.The linear correlation coefficients R2 of all elements are greater than 0.9999,the detection limits are 0.001 μg/L to 0.019 μg/L,the limits of quantification are 0.003 μg/L to 0.063 μg/L,the relative standard deviations are all less than 5%for 6 repeated measurements,and the recoveries are 80.5%to 99.2%.The method has the advantages of simple operation,high analytical efficiency,good linear correlation,low detection limit,good accuracy and precision.The method is used to determine the content of 12 metal elements in the air condensation samples collected in a laboratory.Compared with the occupational exposure limits of the standard method,the measured results show that the concentration of each element in the air of the laboratory is far lower than the corresponding concentration of the occupational exposure limits,and the risk of metal element pollution in the air of the laboratory is low.The established detection method can accurately and quickly determine the content of various metal elements in the air,and provides a method reference for evaluating the safety of metal elements in the air of the laboratory.
condensation collectioninductively coupled plasma mass spectrometrylaboratory airmetallic element
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