title: Determination of trace amounts of boron in steels by on-line reaction/concentration/separation using an anion-exchange column.
abstract: A method for the on-line absorptiometric determination of trace amounts of boron in steels was developed using an anion-exchange column presorbed with chromotropic acid. The on-line reaction and separation were achieved by controlling the pH in order to accelerate the complex formation in the column by 2.7 and to stabilize the complex at pH 8 for the selective elution of a 1:2 complex and its detection at 350 nm. The effects from the iron matrix in the sample were effectively removed by using EDTA as a masking agent; a low limit for boron detection (3σ) of 0.04 µg g(-1) was obtained.
authors.affiliation: College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, P. R. China. shaocy@dhu.edu.cn
authors.forename: Chaoying
authors.initials: C
authors.lastname: Shao
authors.forename: Kazuhisa
authors.initials: K
authors.lastname: Yoshimura