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Organic analysis. XXVII. Rapid determination of lactose in milk and dried milk, and of lactose and sucrose in condensed milk with 3,6-dinitrophthalic acid.


Organic analysis. XXVII. Rapid determination of lactose in milk and dried milk, and of lactose and sucrose in condensed milk with 3,6-dinitrophthalic acid.



J. pharm. Soc, Japan 81: 227-30



Diluted solutions of milk, dried milk and condensed milk were deproteinized with basic zinc carbonate, Zn2(OH)2CO3, and the lactose content estimated, using a calibration curve, from the colour which developed on the addition of 3, 6-dinitrophthalic acid. Sucrose in deproteinized condensed milk was hydrolysed with HCl and estimated in the same way.

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