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Updated: Jun 28, 2026

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies
Published on: July 1, 2016
Flow injection in-valve-mini-column pretreatment combined with ion chromatography for cadmium, lead and zinc
Sumalee Tanikkul1, Jaroon Jakmunee, Somchai Lapanantnoppakhun
1Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
Abstract:
A flow injection (FI) in-valve-mini-column packed with Chelex-100 resin is proposed for on-line sample pretreatment for some metal ions, namely, Cd(II), Pb(II) and Zn(II), prior to simultaneous determination using ion chromatography (IC). A solution containing a mixture of the cations was first passed through the in-valve-mini-column, followed by on-line elution. The eluate was then flowed further to an injection valve and was injected into an ion chromatograph. Conditions of the system were optimized. A single standard calibration was possible. The recoveries of cations were found to be in the range of 95-105%. The developed method was applied to the accurate analysis of zinc ore samples.
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