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I used flame photometry just for once, when I determined the sodium content in beers. In that session, we used KCl & NaCl to create our standards.
In setting up an external standard for Ca in water, what compounds are best to be used? I know CaOH is not a good one as it precipitates out.
I am considering CaCl2 - but wondered as Calcium compounds seem to precipitate out in most cases.
Are there any Ca compounds that would not precipitate?...
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