Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9754515 | Journal of Pharmaceutical and Biomedical Analysis | 2005 | 4 Pages |
Abstract
A flow injection analysis (FIA) manifold for the determination of penicillamine in pharmaceutical preparations is proposed. The manifold includes a solid-phase reactor for the in situ production of the derivatizing reagent, Co(II) ion, which forms a coloured complex with penicillamine in an alkaline medium. The reactor is prepared by natural immobilization of cobalt carbonate on a polymer matrix, which endows it with a high mechanical and microbiological stability. The cobalt released by passage of a 5 Ã 10â4 mol lâ1 sulphuric acid stream at a flow-rate of 2.3 ml minâ1 is merged with a volume of 314 μl of sample containing penicillamine in ammonium-ammonia buffer at pH 9.5 to measure the absorbance at 360 nm. Beer's law is obeyed over the penicillamine concentration range 5-60 mg lâ1. The limit of detection (LOD) of the method is 1 mg lâ1 and its throughput 70 samples hâ1.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
B. Gómez-Taylor Corominas, Julia Pferzschner, M. Catalá Icardo, L. Lahuerta Zamora, J. MartÃnez Calatayud,