Weigh about 5g sample, dissolved in 100mL water, with platinum wire dipped in this solution, Sodium lactate fireworks burning, the flame should be presented violet blue.
Potassium citrate (to C6H5K3O7 meter) Determination
Method summary
In glacial Lactic acid as solvent, crystal violet as indicator, titrate with perchloric acid standard solution to the solution from purple to blue as the end point, to calculate the content in anhydrous form.
Reagents and materials
a, glacial acetic acid;
b, perchloric acid standard titration solution: c (HClO4) = 0.1mol / L;
c, crystal violet indicator solution: 5g / L.
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