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首页> 外文期刊>Talanta: The International Journal of Pure and Applied Analytical Chemistry >Determination of calcium, magnesium and zinc in unused lubricating oils by atomic absorption spectroscopy
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Determination of calcium, magnesium and zinc in unused lubricating oils by atomic absorption spectroscopy

机译：原子吸收光谱法测定废润滑油中钙，镁和锌的含量

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摘要

Varying concentrations of lanthanum and strontium were added to solutions of ashed unused lubricating oils for the determination of calcium, magnesium and zinc content using flame atomic absorption spectrophotometry. At least 3000 mu g g~(-1) of lanthanum or strontium was required to completely overcome the interference of the phosphate ion, PO_4~(3-), and give peak values for calcium. The presence of lanthanum or strontium did not cause an appreciable increase in the amount of magnesium and zinc obtained from the analyses. The method is fast and reproducible, and the coefficients of variation calculated for the elements using one of the samples were 1.6% for calcium, 3.5% for magnesium and 0.2% for zinc. Results obtained by this method were betterthan those obtained by other methods for the same samples.
机译：将不同浓度的镧和锶添加到灰化的未使用过的润滑油溶液中，以便使用火焰原子吸收分光光度法测定钙，镁和锌的含量。要完全克服磷酸根离子PO_4〜（3-）的干扰并给出钙的峰值，至少需要3000μg g〜（-1）的镧或锶。镧或锶的存在不会导致从分析中获得的镁和锌的量明显增加。该方法快速且可重现，使用其中一种样品计算的元素变异系数为钙1.6％，镁3.5％和锌0.2％。对于相同的样品，通过这种方法获得的结果要好于通过其他方法获得的结果。

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