How will you do the speciation ofCr +3 and Cr+6?

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Luis Bertello

Please indicate the original system. ( solid, solution, mixture, (

Arnaud Delobel

It will depend on the sample, but it can be performed by LC-ICP/MS

Susan Verghese

Hi everybody,thank you for replies.Infact i wanted to know in liquid samples

regards

susan verghese p

V.K. Garg

Voltammetry

Niranjan Biswal

HPLC.

CrVI : colorimetric with diphenylcarbazide ( is very sensitive)I

Then total Cr by flame (reductant) AA.

The difference is CrIII.

Other approach is precipitation of ´CrO4 2- as BaCrO4- Filter and AA in flame( it gives only CrIII.

Mahendra Tandekar

Chromium 6+ gives spectra at 445 nm wavelength and Chromium 3+ gives spectra at 595 nm after digestion so from this we can specify between the spectra of Cr+3 and Cr+6 using UV- Visible Spectrophotometer

The spectra is useful with pure solutions,.

Yu. Yu. Petrova

Cr 3+ can be determined by complexometric titration