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CMC in laundry powders - 2005/06/17 06:56
For some time I have been trying to find information concerning HPLC methods for determining CMC content in laundry products. CMC is the industry short form for sodium carboxy methyl cellulose. I would be interested in hearing from anyone with any knowledge of this analyte.
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Re:CMC in laundry powders - 2005/06/17 06:56
Sorry, this isn't going to be much help but,I would not think it possible to do HPLC on insoluble particles like CMC. WAters Inst. Co. may be willing to take up the challenge..
Good luck,
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Re:CMC in laundry powders - 2005/06/17 06:56
Related info (possibly)
No. 61 Danhelka J. SEC Characterization of Sodium Carboxymetyl Cellulose on Steel Column 8x250 HEMA BIO 100 10 µm,Steel Column 8x250 HEMA BIO 300 10 µm and Steel Column 8x250 HEMA BIO 1000 10 µm in series.
I've an applications sheet @ work - post it here monday..otherwise if you can't wait/
http://www.tessek.com/tes3.htm
Sheet No.61
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Re:CMC in laundry powders - 2005/06/17 06:57
Bill & Ludvika,
Thank you both for your responses. I will contact you individually by e-mail. This Canadian lab rat appreciates all the help he can get.
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Re:CMC in laundry powders - 2005/06/17 06:57
Under the correct conditions everything is soluble in something. Thereafter, it is only required to find the correct combination of media for separation and instrument for detection, normal phase, reverse phase, ion, ion exclusion, size exclusion, etc, refractive index, UV, electrochemical, MS, etc. detectors.
If an analyte is not water soluble, addition of a water soluble organic such as an alcohol, acetone, etc. might increase that solubility. Otherwise there are probably organic solvents that it might be soluble in. It is even possible that it is soluble in aqueous acidic or basic solvents. There is also the possibility of exchanging the sodium with some organic to form a more oleophilic or hydrophilic derivative. There are so many possibilities that we do not have time to investigate them all. Hopefully someone already has a method for what we need to do. If so we do not individually have to keep re-inventing the wheel. That is the POWER of these types of forums.
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