Flow injection in-valve-mini-column pretreatment combined with ion chromatography for cadmium, lead and zinc determination.
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.
Tanikkul
Sumalee
S
Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
Jakmunee
Jaroon
J
Lapanantnoppakhun
Somchai
S
Rayanakorn
Mongkon
M
Sooksamiti
Ponlayuth
P
Synovec
Robert E
RE
Christian
Gary D
GD
Grudpan
Kate
K