摘要
用经巯基棉富集处理后的溴酸钾—溴化钾溶液、盐酸羟胺溶液消解处理水样,冷原子吸收法测定,经空白实验、精密度实验、加标回收实验,该方法可将样品空白值降低2个数量级,相对标准偏差为5.4%～8.7%,加标回收率在96%～104%之间。此法可大大降低分析方法的检出限,提高测定结果的准确度和精密度。
Flamelessatomicabsorptionmethodwas used to determinethe tracemercuryaftertreatingwatersamples with potassiumbromate—potassiumbromidesolution,oxammoniumbydrochloridesolutionwhichare treatedby sul-phydry1cottonfiber.We know that the methodcan reduceblankvalueof sampleto two numberlevelby blank test,precisiontest and recoverytest.The relativestandardeddeviationwas5.4%～8.7%;the rate of recoverywas96%～104%.The methodwill greatlydecreasedetectionlimitsof analysismeans,improvedegreeof accuracyand precisionfor determinationresult.
关键词
汞
测定
巯基棉
冷原子吸收
检出限
准确度
精密度
sulphydrylcottonfiber
flamelessatomicabsorption
detectionlimits
degreeof accuracy
precision
