Selective kinetic fluorimetric determination of copper at the ngml level
β Scribed by M.C. Gutierrez; A. Gomez-Hens; M. Valcarcel
- Book ID
- 118994693
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- English
- Weight
- 455 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0039-9140
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π SIMILAR VOLUMES
A procedure is reported for the kinetic determination of iodate/periodate mixtures based on the reduction of these anions by the iron(II)/dipyridylglyoxal dithiosemicarbazone complex in an acidic medium. The reaction is monitored spectrophotometrically at 410 nm (absorption maximum of the iron(II1)
The method is based on a 1:l Cr(VI)/3-hydroxyflavone complex which is extracted into benzene at H,, = -0.6. The complex has a pK\* value of 7.8 f 0.1. Chromium is determined in the range 10-650 ng ml-' with excitation at 368 nm and emission measurement at 530 nm. The relative standard deviation is 6