Summary An acidimetric procedure for the determination of glycerol following oxidation with periodic acid has been described. This procedure has been successfully applied to C. P. grade glycerin, spent soap lyes, soap lye crudes, half crudes, saponification crudes, evaporator salt, and mixtures of glycerol with trimethylene glycol and polyglycerols. Factors that influence the determination, such as size of sample, presence of salt and the presence of organic compounds containing hydroxyl groups, have been discussed.

SummaryA modified and improved method for the determination of monoglyceride by the periodic acid method has been presented as well as a method for free glycerol in fatty products. The advantages of the method for monoglyceride are 1. eliminates danger of secondary reactions due to elevated temperatures, 2. eliminates the need of shaking to effect good contact and complete reaction between sample and reagent, and 3. makes removal of free glycerol from the sample easier.

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SummaryProcedures have been presented for the determination of glycerol, propylene glycol, and trimethylene glycol in the solutions containing all three and for analysis of sweet water concentrates. The methods are not limited to the products studied, but may be applied to mixtures of other hydroxy compounds which possess similar properties.