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查看详情Thisdocumentspecifiesmethodsofthedeterminationofdivalentcopperions(Cu2+)，divalentmanganeseions(Mn2+)，andhexavalentchromiumions［Cr(Ⅵ)］inaqueoussolutionusinganultraviolet-visiblespectrophotometer.
Thisdocumentisapplicableforthedeterminationofdivalentcopperions(Cu2+)，divalentmanganeseions(Mn2+)andhexavalentchromiumions［Cr(Ⅵ)］inaqueoussolution.Thesoil，foodorbiologicalsamplescanalsobemeasuredaccordingtothisdocumentafterpropertreatment.
Thedetectionlimitsofeachioninaqueoussolutiontobeappliedtothisdocumentareasfollows:thecontentofCu2+isnotlessthan1.00×10-7mol/L，thecontentofMn2+isnotlessthan1.00×10-6mol/L，andthecontentofCr(Ⅵ)isnotlessthan4.00×10-7mol/L.
ThepHrangesofwatersamplestobeappliedtothisdocumentareasfollows:thepHrangeofaqueoussolutionscontainingCu2+is2-6，thepHrangeofaqueoussolutionscontainingMn2+is3-7，andthepHrangeofaqueouss
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