title: Application of chelation ion chromatography to the determination of lanthanides in agriculture.
abstract: Lanthanides are widely present in soil and plant. In this paper, it is the first time that chelation ion chromatography is applied to analyse lanthanides in a series of samples in agriculture. This technique can eliminate bulk quantity of alkali, alkaline earth metals on chelating concentrator column (MetPac CC-1) and eliminate transition metals on cation exchange column (TMC-1) from complex matrices with ammonium acetate buffer while lanthanides are concentrated. It is shown to be capable of separating and determining all lanthanides on mixed-bed ion exchange column (CS5) in a wide variety of sample types with high accuracy. Elution is carried out with a concentration gradient of oxalic acid (Ox) and diglycolic acid (DGA), coupled with post-column spectrophotometric detection with 4-(2-pyridylazo)resorcinol (PAR) at 520 nm. It can determined ng ml(-1) scales of lanthanides. The whole run time after sample injection is about 55 min.
authors.affiliation: College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
authors.forename: H
authors.initials: H
authors.lastname: Lu
authors.forename: S
authors.initials: S
authors.lastname: Mou
authors.forename: Y
authors.initials: Y
authors.lastname: Yan
authors.forename: F
authors.initials: F
authors.lastname: Liu
authors.forename: K
authors.initials: K
authors.lastname: Li
authors.forename: S
authors.initials: S
authors.lastname: Tong
authors.forename: J M
authors.initials: JM
authors.lastname: Riviello