流动注射在线预富集人工神经网络-光度法同时测定地质样品中金、钯、银

Flow Injection On -line Preconcentration and Simultaneous Spectrophotometric Determination of Gold, Palladium and Silver

将流动注射在线预富集技术引入光度分析，较好地解决了一般树脂相光度法重现性不好的问题。提出了应用淋洗曲线作为多组份同时测定的定量依据；采用人工神经网络法对体系的非线性数据进行处理，较好地解决了复杂的地质样品中痕量贵金属元素Ａｕ、Ｐｄ、Ａｇ的同时测定。并与ＰＬＳ、ＮＰＬＳ多元校正方法进行了对比，显示出人工神经网络法具有高度非线性表达能力。本文还对Ｂ－Ｐ算法的应用及其影响因素作了较深入的探讨。

A new system of flow injection on-line preconcentration with VS- I anion exchange fiber was established for simultaneous spectrophotometric determination of trace Au, Pd and Ag in geological samples. A FIA simultaneous determinaion method based on elution curves was brought up. The ANN calculation was used to deal with the nonlinear data, and the application and influence factors of B-P algorithm were investigated. The study on three kinds of multivariate calibration methods showed that the B-P algorithm has a strong correction capability for nonlinear data.