Chromium occurrence in the environment and methods of its speciation.

The investigation of a groundwater resource impacted with Cr(VI) requires analysis of groundwater for Cr(VI) and total Cr. Most notably, Cr(III) is considered to be a trace element essential for the proper functioning of living organisms, whereas Cr(VI) may exert toxic effects on biological systems. The nature and behavior of various Cr forms found in wastewater can be quite different from those present in natural waters because of altered physicochemical conditions of the eluents originating from various industrial sources. The chromium content in surface waters is usually at the low μgL−1 level, typically between 0.3 and 6 μgL−1. Speciation of Cr(III) and Cr(VI) has been a longstanding analytical challenge. The selective determination of Cr(VI) is of particular importance because of its toxicity. Due to the importance of Cr(III) and Cr(VI), the accurate and sensitive determinations of these ions are the important part of the analytical chemistry. Chromium speciation is very important in different branch...

Chemical Speciation of Chromium in Water: A Review

Chelating Resins and Their Applications in the Analysis of Trace Metal Ions

http://users.auth.gr/users/0/1/051310/public_html/Publications/11.pdf

Flame atomic absorption spectrometric determination of chromium(VI) by on-line preconcentration system using a PTFE packed column.

Application of flowing stream techniques to water analysis Part III. Metal ions: alkaline and alkaline-earth metals, elemental and harmful transition metals, and multielemental analysis.

Mauricio C. Pannain

Papers

On the spectrophotometric flow injection determination of chromium(VI) in natural waters after on-line preconcentration on activated alumina