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Joined: 3/4/2010
Posts: 1
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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?
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Joined: 12/16/2009
Posts: 69
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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.
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Thanks Perry! I'm giving it a try today. Looking forward to the results... your help is very much appreciated.
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This piece was cogent, well-wirettn, and pithy.
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You're the gerteast! JMHO
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THX that's a great anwesr!
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Good point. I hadn't tghohut about it quite that way. 
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