What I think is Dithiothreitol. As it is water-soluble and does not form a precipitate. But, the thing is it contains sulphur which is quite hazardous to aquatic animals.
Dear Shashi Bhushan Singh many thanks for your interesting technical question. I did not know that sulfur is hazardous to aquatic animals, but I think you are right. In this context I found for example the following article:
Sulfide as a Toxicant in Aquatic Habitats
(see attached pdf file)
Getting back to your original question it is well established for a long time that dimethylglyoxime is highly suited for the quantitative determination (e.g. colorimetric, spectroscopic, gravimetric etc.) determination of nickel. As already indicated by Shashi Bhushan Singh it forms a red, insoluble chelate complex with nickel.
For more detailed information, please have a look at the following articles (there are many more):
1. Determination of nickel(II) as the nickel dimethylglyoxime complex using colorimetric solid phase extraction
Article Determination of nickel(II) as the nickel dimethylglyoxime c...
2. Effects of ultrasonic irradiation on the spectrophotometric determination of nickel with dimethylglyoxime
Article Effects of ultrasonic irradiation on the spectrophotometric ...
3. Colorimetric Determination of nickel with Dimethylglyoxime
(see attached pdf file) 4. Spectrophotometric determination of nickel (II) in waters and soils: Novel chelating agents and their biological applications supported by DFT method
Article Spectrophotometric determination of nickel (II) in waters an...
This article is freely available as public full text on RG.
T. H. Al-Noor sir can you elaborate a little bit. Because what I know is dimethylglyoxime forms precipitate which may affect the results.
Dear Shashi Bhushan Singh many thanks for your interesting technical question. I did not know that sulfur is hazardous to aquatic animals, but I think you are right. In this context I found for example the following article:
Sulfide as a Toxicant in Aquatic Habitats
(see attached pdf file)
Getting back to your original question it is well established for a long time that dimethylglyoxime is highly suited for the quantitative determination (e.g. colorimetric, spectroscopic, gravimetric etc.) determination of nickel. As already indicated by Shashi Bhushan Singh it forms a red, insoluble chelate complex with nickel.
For more detailed information, please have a look at the following articles (there are many more):
1. Determination of nickel(II) as the nickel dimethylglyoxime complex using colorimetric solid phase extraction
Article Determination of nickel(II) as the nickel dimethylglyoxime c...
2. Effects of ultrasonic irradiation on the spectrophotometric determination of nickel with dimethylglyoxime
Article Effects of ultrasonic irradiation on the spectrophotometric ...
3. Colorimetric Determination of nickel with Dimethylglyoxime
(see attached pdf file) 4. Spectrophotometric determination of nickel (II) in waters and soils: Novel chelating agents and their biological applications supported by DFT method
Article Spectrophotometric determination of nickel (II) in waters an...
This article is freely available as public full text on RG.
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