WEF Discussions — Now on LinkedIn!

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TDS/VDS LCS
Jami
Posted: Thursday, March 4, 2010 10:49 AM
Joined: 3/4/2010
Posts: 1


I need an LCS for TDS/VDS.  I am using NaCl, but need another compound to combine with it that will hold at 180 degrees but then volatilize at 550 degrees.  Any suggestions? 


Perry Brake
Posted: Thursday, March 4, 2010 3:12 PM
Joined: 12/16/2009
Posts: 69


Potassium hydrogen phthalate (KHP) should work, Jami.  Being very soluble in water, a 300 mg/L solution of KHP should give a TDS of 300 mg/L.  A study by the joint EPA Region 1/WA State Dept of Ecology lab found the same 300 mg/L solution gave an average total volatile solids of 169 mg/L.

 

If you decide to try KHP, be aware that it is hygroscopic...dry it at 105°C, store it in a desiccator, and weigh it immediately after removing from the desiccator.


Anonymous
Posted: Thursday, March 18, 2010 8:59 AM

Thanks Perry!  I'm giving it a try today.  Looking forward to the results... your help is very much appreciated.



Anonymous
Posted: Sunday, June 26, 2011 12:37 PM
This piece was cogent, well-wirettn, and pithy.
Anonymous
Posted: Sunday, June 26, 2011 8:19 PM
You're the gerteast! JMHO
Anonymous
Posted: Monday, June 27, 2011 1:15 PM
THX that's a great anwesr!
Anonymous
Posted: Monday, June 27, 2011 2:52 PM
Good point. I hadn't tghohut about it quite that way.