Paste formulations of menazon were chromatographed on a column of acidic alumina. The emulsifying agents and other active ingredients were eluted with hexane, diethyl ether and chloroform. Menazon was finally eluted with dioxan and was then titrated potentiometrically with 0·1 N perchloric acid in dioxan-acetic acid (1 + 1).
P. Maini, Analyst, 1971, 96, 343 DOI: 10.1039/AN9719600343
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