流动注射在线分离预浓集分光光度法测定环境水样中的痕量铬(Ⅵ)

Determination of trace chromium(Ⅵ) in environmental waters using on-line separation and preconcentration-flow injection spectrophotometry

利用自制微型离子交换柱 ,采用流动分析技术 ,对含铬 (Ⅵ )环境水样在线自动化分离和预浓集处理 ,联用分光光度检测手段 ,实现了在线自动化样品分离富集及测定。方法的线性范围是 1～ 40ng mL铬 (Ⅵ )。用于测定井水、自来水、电镀液、电镀废液、电镀排放液中的痕量铬 (Ⅵ ) ,回收率在 95 .7%～ 1 0 5

A new method for on-line separation and preconcentration of trace amounts of chromium(Ⅵ) in natural waters and industrial waste waters was developed by using self-made ion-exchange micro-column and flow injection analysis technology. Linear range of determination was (1～40) ng/mL. Samples of natural waters, electroplating liquor, electroplating waste and electroplating effluent were analyzed by the developed procedure with satisfactory results. Recoveries of the method was between 95.7%～105%.