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Indirect spectrophotometric determination of complexing agents by flow-injection analysis based on redox reaction of copper(II) with iron(II)

✍ Scribed by Hideyuki Itabashi; Kazuyuki Umetsu; Norio Teshima; Keiichi Satoh; Takuji Kawashima

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 507 KB
Volume: 261
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(92)80193-b

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✦ Synopsis

An mdlrect spectrophotometrlc contmuous-flow method IS presented for the detemunatlon of trace amounts of complexmg agents such as EDTA, DTPA, CyDTA, EDTA-OH, NTA, citrate and pyrophosphate It IS based on the acceleratmg effect of complexmg agents on the rate of the redox reactlon of copper(U) with Iron m the presence of neocuprome In this redox system, a copper(I)-neocuprome complex (A,,,= = 454 nm) IS produced, the concentratlon of which IS proportlonal to the concentration of the complexmg agent Complexmg agents at the 1O-6-1O-5 mol 1-l level can be determmed at a rate of 180 samples hK' The determmatton of EDTA, NTA and pyrophosphate m muttures was also studled

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