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