悬浮液直接进样原子吸收光谱法及其应用进展

原子吸收光谱具有灵敏、快速、选择性高的特点 ,广泛应用于食品、生物样品、环境样品中微量元素的测定 ,但是测定前必须采用干法消化法或湿法消化法对样品进行处理 ,这两种方法均操作繁琐、耗时长、样品容易受污染、待测组份容易受损失。悬浮液直接进样原子吸收光谱法有效地克服了这些缺点 ,能够快速、准确地测定食品、生物样品、环境样品中的微量元素。讨论了悬浮液直接进样原子吸收光谱技术中基体改进剂的选择、悬浮液的制备、升温程序的选择等关键问题 ,并详细介绍了悬浮液直接进样原子吸收光谱法在食品、生物样品、环境样品中微量元素分析中的应用。

PROGRESS OF SUSPENSION SAMPLING ATOMIC ABSORPTION SPECTROPHOTOMETRY AND ITS APPLICATION

As a sensitive, rapid and selective method, atomic absorption spectrophotometry has been extensively applied in the determination of trace elements in foods, biological samples and environmental samples. But all the samples must be pretreated by dry digestion process or wet digestion process, which are tedious and time-killing , and during which the samples may be contaminated and the trace elements in the samples may be lost impartially. Suspension sampling atomic absorption spectrophotometry can effectively solve these problems.The trace elements in foods, biological samples and environmental samples can be determined rapidly and accurately by this technique.Some committed items in suspension sampling atomic absorption spectrophotometry, such as the selection of matrix improving agents, preparation of the suspension and the selection of temperature programe, have been discussed and were describled in details the application of suspension sampling atomic absorption spectrophotometry in the determination of the trace elements in foods, biological samples and environmental samples.