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West和loria提出利用I~-同Ca~2形成络合物,而在甲基异丁酮(IBMK)中用磷酸三丁酯萃取,然后以AAS法测定。在其他PO_4~(3-)存在下测定P_2O_7~(4-)唯一的AAS法是以利用Amberlite LA-1[N十二烷基(三烃基)胺]将Cu~(2+)萃取到甲基异丁酯或乙酸乙酯中的阻滞效应为基础,萃取的
West and loria proposed the use of I ~ - with Ca ~ 2 to form complexes, while in methyl isobutyl ketone (IBMK) with tributyl phosphate extraction, and then determined by AAS method. The only AAS method for the determination of P_2O_7 ~ (4-) in the presence of other PO_4 ~ (3-) is to extract Cu ~ (2+) with Amberlite LA-1 [N dodecyl Isobutyl acetate or ethyl acetate blocking effect based on the extraction