Unless otherwise specified, the test reagents used were of analytical grade reagents; test water should meet the GB 6682 in three water specifications; determination of lactic acid powder standard solution, impurity standard solution, preparations and products according GB 601, GB 602, GB 603 requirements.
Identification Test
Reagents and materials
Pyridine-acetic anhydride solution: 3 +1.
Identification methods
Identification of citrate
Weigh approximately 1g sample, dissolved in 100mL water, buffered lactic acid, take 0.5mL been placed in 20mL of pyridine acetic anhydride solution in a test tube, shake, solution should be magenta.
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