✦ LIBER ✦
Fluorimetric determination of chromium at low levels with 3-hydroxyflavone and application of the method to steels
✍ Scribed by A. Cabrera-Martín; J.S. Durand; S. Rubio-Barroso
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- English
- Weight
- 359 KB
- Volume
- 183
- Category
- Article
- ISSN
- 0003-2670
No coin nor oath required. For personal study only.
✦ Synopsis
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 6.1% for 332 ng ml-' chromium (R = 10). The method is applied to the determination of chromium in steels.