Abstract:Qualitative determination of lead-containing surface paint reference material numbered as 2579e was conducted with home lead testing reagent,and the depth distribution of lead in the paint surface of toy was discussed. Based on this,a method for the determination of lead content in paint surface of toy was established by laser-induced breakdown spectroscopy. In order to reduce the impact of self-absorption,the calibration curve was obtained in the logarithmical form of spectral intensity I and the element concentration c at lead 405.78 nm. The results indicated that the linear equation was lgI=5.56+0.44·lgc, with fitting degree R of 0.956,and the detection limit was 72 μg/g. This method was used to the determination of carbonate rock composition analysis certified reference materials GBW07136. The relative error between the found and the certified value was 8.3%,and the relative standard deviation for ten times was 7.1%。The lead content of orange toy car purchased from stores was 18.5 mg/g.
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WANG Yang-en. Determination of lead in paint surface of toy by laser induced breakdown spectroscopy. , 2013, 33(12): 34-38.
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