期刊论文

Determination of Trace Cadmium with Ternary Complex of Cd2＋ - Bromatum Kalium- Phenanthroline by Resonance Light Scattering

中文

南华大学学报(自然科学版)

1673-0062

2009

23

1

89-91+95

10.19431/j.cnki.1673-0062.2009.01.023

基金项目：湖南省卫生厅基金资助项目（B2007096）

本校为第一机构

在pH 9.0的KH2PO4-NaOH缓冲液中,Cd2+与溴化钾、邻菲罗啉反应生成多元配合物导致体系共振光散射强度增大,在λ = 470.3 nm处共振光散射增大程度与镉的浓度有良好的线性关系.方法线性范围为:0.04～2.68 μg/mL,检出限为1.28×10-2 μg /mL,相对标准偏差为0.98%和1.68%,样品加标回收率为91.8%～104.7%.

A new resonance light scattering method for determination of trace cadmium has been studied in the KH2PO4 - NaOH buffer solution at pH 9.0 and in the presence of CT- MAB. Under the selected conditions, the enhancement of resonance light scattering （RLS） at 473.0nm was linear to the concentration of Cd2 ＋ ranging from 0.04 - 2.68 μg/mL. The detection limit was 12.8 ng/mL and the RSD were 0.98%, 1.68% ...