Institute of Chemistry, University of Campinas, P.O. Box 6154, 13083-970 Campinas, SP, Brazil.
Talanta. 2011 Apr 15;84(2):335-40. doi: 10.1016/j.talanta.2011.01.011. Epub 2011 Jan 15.
A closed vessel method using a microwave oven was developed for the determination of As, B, Ba, Bi, Cd, Cr, Cu, Fe, Hg, Ni, Pb, Se, Sn and Sb by Inductively Coupled Argon Plasma Optical Emission Spectrometry (ICP OES). The method was applied to samples of polyvinyl acetate-based glue in water emulsions. Parameters such as wavelength, nebulization pressure and RF power were optimized and the residual acidity after the digestion process was determined. The addition of internal standards was evaluated and the accuracy of the proposed method was verified with addition and recovery experiments and also with certified reference materials, achieving good results. Using a nebulization flow rate of 0.73 L min(-1)and a RF power of 1200 W it was possible to obtain adequate values for limit of detection and limit of quantification as well as recovery values in the range of 80-106%, for all the analytes. The analysis of coloured glue samples (white, black, blue, yellow, red and green), widely used by children, showed no contamination by the elements studied.
采用微波炉密闭容器法，结合电感耦合等离子体原子发射光谱法（ICP-OES）测定了聚醋酸乙烯酯基胶水在水乳液中的砷、硼、钡、铋、镉、铬、铜、铁、汞、镍、铅、硒、锡和锑。优化了波长、雾化压力和射频功率等参数，并确定了消解过程后的残留酸度。评估了内标物的添加，并通过添加和回收实验以及使用标准参考物质对所提出方法的准确性进行了验证，结果良好。采用 0.73 L min(-1)的雾化流量和 1200 W 的射频功率，可以获得所有分析物的检测限和定量限以及 80-106%范围内的回收率的适当值。对儿童广泛使用的彩色胶水样品（白色、黑色、蓝色、黄色、红色和绿色）进行分析，未发现研究元素的污染。
