微波消解-逐步多重线性回归分光光度法同时测定催化剂中钴和镍

SimultaneousDeterminationofCobaltandNickelinCatalystbyMicrowaveDigestionStepwiseMultipleLinearRegressionSpectrophotometry

研究并确定了微波消解的最佳工作条件，应用逐步多重线性回归对ＰＡＲＣｏ２＋、Ｎｉ２＋体系进行回归分析，快速、准确地测定了催化剂中钴和镍的含量。钴和镍的线性范围分别为０～３０μｇ／２５ｍｌ和０～２５μｇ／２５ｍｌ，合成样品回收率分别在９６３％～１００９％和９９２％～１０４０％之间。Ｃｏ２＋和Ｎｉ２＋含量测定结果的相对标准偏差分别≤３４％和≤３６％，相对误差分别在±２５％和±２０％之内。

Inthispaper,catalystsamplesweredigestedinamicrowavedigestionsystemandinclosedvesselTheinfluenceoftheamountofvariousacidanddifferentdigestionconditionwasstudiedTheoptimumparameterformicrowavedigestionandmeasuringconditionswereselectedThecontentsofcobaltandnickelincatalystcanbecalculatedrapidlyandaccuratelybystepwisemultiplelinearregressionThelinearrangeis030g/25mlforCo2+and025g/25mlforNi2+TherecoveryofCo2+andNi2+insyntheticsamplesarebetween963%1009%and992%1040%,respectivelyTherelativestandarddeviationofanalyticalresultsincatalystsamplesislessthan34%forCo2+andlessthan36%forNi2+,andrelativeerrorislessthan25%andlessthan20%,respectively