Journal of the Brazilian Chemical Society | |
The use of solid phase reactors as the source of a catalytic solution: the indirect flow-injection spectrophotometric determination of amino acids | |
J.v Gil Torró1 
Rib-type="author"> |
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关键词: Cu(II) catalyst; spectrophotometry; glycine; amino acids; flow analysis; solid-phase reactors; | |
DOI : 10.1590/S0103-50531997000100011 | |
来源: SciELO | |
【 摘 要 】
The indirect determination of amino acids is carried out in a flow-injection assembly by means of a solid-phase reactor containing cupric salts, immobilized in polyester resin beads. A pharmaceutical substance is forced through the reactor and the released cupric ions (complexed by the pharmaceutical substance) act as a catalyst for the subsequent reaction between Fe(III) and sodium thiosulfate. The calibration graph is linear over the range 0.1-3.0 µg mL-1 glycine, the RSD was 2.3%, and the sample throughput was 28 h-1. The influence of foreign substances was studied and the method was applied to the determination of glycine in two different pharmaceutical formulations.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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