微波消解ICP-MS测定铝塑包装材料中的Pb,Cr,Cd和As含量（英文）

发布时间：2018-04-30 16:55

本文选题：微波消解 + 电感耦合等离子体质谱　；参考：《光谱学与光谱分析》2017年02期

【摘要】：通过微波消解法对铝塑包装材料的前处理方法进行了深入的研究,考虑了5种不同的消解试剂组合以及不同的浓度配比关系对铝塑包装材料消解效果的影响,并对消解现象产生的可能性原因进行了简单的分析,结果发现硫酸-硝酸试剂组合消解效果最佳,正交试验结果表明试剂组合的最佳配比为1∶7。随后采用电感耦合等离子体质谱法(ICP-MS)测定了铝塑包装材料中的Pb,Cr,Cd和As,各元素仪器检出限依次为0.215,0.067,0.006和0.020ng·mL~(-1),线性相关系数在0.999 5以上;2#试样进行加标回收试验,回收率在83.8%~111.6%之间,相对标准偏差(RSD)在0.5%~7.4%之间;5种试样两次独立平行测定结果均比较接近,t检验法(取置信水平α=0.05)结果表明两次测定结果均无显著性差异。综上表明该方法线性关系好,检出限低,回收率高,精密度好,可准确测定铝塑包装材料及类似材料中的Pb,Cr,Cd,As含量。
[Abstract]:The pretreatment method of aluminum-plastic packaging materials was studied by microwave digestion. The effects of five different combinations of digestion reagents and different concentration ratios on the digestion effect of aluminum-plastic packaging materials were considered. A simple analysis of the possible causes of the digestion phenomenon was carried out. The results showed that the combination of sulfuric acid and nitric acid had the best digestion effect. The orthogonal experiment showed that the optimum ratio of reagent combination was 1: 7. Subsequently, the ICP-MS method was used to determine the contents of Pb, Cr, Cr, CD and as in the aluminum-plastic packaging materials. The detection limits of each element were 0.215 ~ 0.067 ~ 0.006 and 0.020ng ~ (mLX) ~ (-1) respectively. The linear correlation coefficient was more than 0.999 and the recovery rate was between 83.8% and 111.6%. The relative standard deviation (RSDs) is between 0.5% and 7.4%. The results of two independent parallel measurements of five samples are close to those of the t test (伪 0.05 confidence level). The results show that there is no significant difference between the results of the two tests. The results show that the method has good linear relationship, low detection limit, high recovery rate and good precision. It can be used to determine the content of PbPbCCrCrOCdDas in aluminum-plastic packaging materials and similar materials accurately.
【作者单位】：重庆市计量质量检测研究院;国家铝镁合金及制品质量监督检验中心;
【基金】：This scientific research project CQZJKY2014029 was financially supported by Chongqing Bureau of Quality and Technology Supervision
【分类号】：O657.31;TB484

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