Vitamin C magnesium phosphate identification methods: 1, take this product about 50 mg, add 0.1 mol/L HCL solution 5 ml, and 10% ferric trichloride hydrochloric acid solution (three ferric chloride 10 g put in 100 ml volumetric flask, with 0.1 mol/L solution of hydrochloric acid, diluted to scale, shake) 2 drops, namely the wine red. 2, in 0.1 mol/L HCL solution made per milliliter containing 20 mu g solution, using spectrophotometry, the largest in the wavelength of 237 nm absorption; In 0.1 mol/L sodium hydroxide solution is made per milliliter containing 20 mu g solution, using spectrophotometry, in had maximum absorption wavelength of 261 nm. Jingjiang hengtong biotechnology co., LTD. Is specialized in vitamin C magnesium phosphate, sodium phosphate ester vitamin C and ascorbic acid magnesium phosphate ester production and sales, welcome to inquire.