I don't think I'm getting enough magnesium in my diet.

The thing about buying a white powder: how does one know if it isn't cornflour?

Same problem with buying cocaine, I guess.


If you really want to know:

Dissolve about 15 mg of the substance to be examined in 2 mL
of water R or use 2 mL of the prescribed solution. Add 1 mL of
dilute ammonia R1. A white precipitate is formed that dissolves
on addition of 1 mL of ammonium chloride solution R. Add
1 mL of disodium hydrogen phosphate solution R. A white
crystalline precipitate is formed.


The test for citrates won't fit in a toot but you can find it here

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