采用冷等离子体模式,以57Fe为内标,建立了单点激光剥蚀电感耦合等离子体质谱法(LA-ICP-MS)测定钢铁材料中各元素的方法.氧化铝砂纸进行样品表面处理会引入玷污;样品表面粗糙度对结果影响不大;除钛外,样品直径对结果影响不明显;砷、锡的分馏因子(FI)分别为0.85和0.83,有分馏效应,其他元素的FI在0.93～1.05之间,没有分馏效应;采用不同系列标准物质进行曲线拟合,除硅、磷、硫外,其他元素的相关系数都大于0.95,基体效应不明显;方法能实现用34 S测定硫,但不能测定碳.建立了测定低合金钢及其钢丝中铝、硅、磷、硫、钛、钒、铬、锰、钴、镍、铜、砷、钼和锡等元素的方法,标准物质的测定值与认定值基本吻合;精密度考察发现,各元素的RSD(n=5)为0.7％～8.7％(钛的RSD达17％).方法还适用于其他钢铁材料中钒、铬、锰、钴、镍、钼和锡等元素的测定,有实际应用价值.
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