DETERMINATION OF TRACE CADMIUM BY FLOW INJECTION ON-LINE MICROCOLUMN PRECONCENTRATION COUPLED WITH FLAME ATOMIC ABSORPTION SPECTROMETRY USING HUMAN HAIR AS A SORBENT

作者：Tang An Na^*; Hu Yun Fei

来源：Instrumentation Science & Technology, 2011, 39(1): 110-120.

DOI：10.1080/10739141003707592

• cadmium
• flame atomic absorption spectrometry
• flow injection
• hair
• on-line
• preconcentration

A novel method using a cone-shaped pipette tip packed with human hair as an adsorption material has been developed for the on-line flow injection preconcentration of trace Cd(II) ions based on its complex formation with the ammonium pyrrolidine dithiocarbamate (APDC) prior to flame atomic absorption spectrometric (FAAS) determination. Cd-PDC complex sorbed on the human hair was eluted by 4.0mol L-1 HNO3. The enhancement factor is 19, and the detection limit (3 sigma) is 0.77g L-1. The proposed method was successfully applied to the determination of trace cadmium in drinking water, beverage samples, and the certified reference materials.

• 出版日期2011
• 单位南开大学