流动注射小柱预富集-石墨炉原子吸收联用分析茶汤和水样中不同形态的铝

Flow Injection Column Preconcentration Coupled with ETAAS for the Speciation of Al in Tea Infusion and Water Samples

将装有８－羟基喹啉修饰的玻璃小珠或ＸＡＤ－２聚合物小球的微型富集分离柱接入流动注射－石墨炉原子吸收联用系统，分析茶汤和水样中不同形态的铝．选择不同的富集分离条件，样品中的铝可被分为与８－羟基喹啉快速络合的无机态铝、有机疏水态铝和总铝等几个种类，并比较和讨论实验结果．

A method has been developed for the speciation analysis of Al in teainfusion and water samples using an automated online preconcentration system with flow injection coupled directly to an electrothermal atomic absorption spectrometer. Two preconcentration materials, 8quinolinol immobilized on controlledpore glass and Amberlite XAD2 copolymer, were investigated. Al in the sample could be distinguished as fast exchangeable Al, hydrophobic Al, and total Al, based on the preconcentration conditions.