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导言和问题的提出在实际分析工作中,只是在ppm范围内完成金的定量测定.为了改进检测限,基体的预先分离是必要的.能够通过分配法或选择性吸附法来实现.对于富集后的最后测定,检测能力很强的原子吸收分光光度法已被肯定.为了进一步改进测定金的检测限和精密度,我们做了试验,寻找一种比迄今为止常用的甲基异丁基酮更有选择性的萃取剂和一种对金具有高选择性的吸附剂.在第一种情况时,异丁烯酸甲酯(MME)显得特别有效;对第二个情况,二苯乙酮二氯化硒适合作为痕量金的高选择性吸附剂.用了这两
INTRODUCTION AND PROBLEM PROBLEMS In the actual work of analysis, the quantitative determination of gold is done only in the ppm range In order to improve the detection limit, the pre-separation of the matrix is necessary and can be achieved by the partitioning method or the selective adsorption method After the final determination, the ability to detect strong atomic absorption spectrophotometry has been affirmed.In order to further improve the determination of gold detection limit and precision, we have done a test to find a more so far than the commonly used methyl isobutyl ketone A more selective extractant and an adsorbent that is highly selective to gold.In the first case, methyl methacrylate (MME) appears to be particularly effective; in the second case, acetophenone dichloride Selenium is suitable as a highly selective trace gold sorbent