A chemiluminescence (CL) method for the determination of humic acid (HA) based on the oxidation of HA with hydrogen peroxide in the presence of formaldehyde in alkaline solution is described. This method is sensitive and selective for the determination of \(\mathrm{HA}\) in natural water. \(\mathrm{
Determination of trace amounts of chromium(VI) in water by electrochemical methods
✍ Scribed by Catherine Elleouet; François Quentel; Christian Madec
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 555 KB
- Volume
- 257
- Category
- Article
- ISSN
- 0003-2670
No coin nor oath required. For personal study only.
✦ Synopsis
A sensltlve procedure for the determmatlon of chronnum(VJ) 1s described A chelate of chronuum with an orgamc hgand IS adsorbed on a hangmg mercury drop electrode and the reduckon current of the accumulated chelate LY measured by dlfferentlal-pulse voltammetry The effects of various parameters (pH, hgand concentration, potential and collection time) on the response are dlscussed Possible interferences by trace metals and organic matter are consIdered
📜 SIMILAR VOLUMES
A rapid accurate method for determining trace amounts of water in glycerides is presented. The method is based on the measurement of the combination band for water which occurs at 1.896 , L I in chloroform solution. In addition to the advantage of making it possible to work at low levels, the method
Cyclic voltammetry and limiting currents to an rde have been used for the determination of the water in the 0.3-20 ppm range, in PC electrolytes. Carefully dried solutions yielded voltammetric peaks proportional to the amount of water added. In KPF, electrolytes, the cathodic current corresponding t
An amplification method has been described for the determination of chromium in low alloy steel samples. The well-known Leipert reaction has been coupled with a precipitate exchange reaction between lead iodate and chromium(III)-EDTA complex for amplification. Chromium is determined indirectly by de