Anions in non saline waters - Determination of Anions in Natural and Treated Waters - page 146

2.19.4 Polarography
Differential pulse voltammetry has been used to determine chromate and chromium
[227,228].
Crosmun and Mueller [228] achieved a detection limit of 10µg L −1 chromate in non
saline waters.
2.19.5 Enzymic method
Guilbault et al. [229] showed that dichromate can be determined by its inhibitory action
on the enzymic activity of the hyaluronidase enzymic system.
2.19.6 Ion chromatography
The application of this technique to the determination of chromate is discussed under
multianion analysis in section 12.2.5.
2.19.7 High performance liquid chromatography
Reverse phase high performance liquid chromatography has been used to carry out the
simultaneous determination of Cr(III) and Cr(VI) in water [230]. The sample is buffered
to pH 5.8 and allowed to react overnight at