Invert Sugar Assays

Assay Not less than 90.0% and not more than 110.0% of the labeled amount of sucrose and of Invert Sugar. 

Assay Determine as directed in Invert Sugar under Total Solids, Appendix X. 

Note Consult ICUMSA1 mles for further details applying to Assay, Color, and Invert Sugar. 

Assays for hydrocyanic acid are almost invariably low compared with the amount added it should be the first constituent determined immediately on opening the sample in order to avoid low results due to volatilisation. Monier-Williams has also shown that hydrocyanic acid may form a cyanhydrin with laevulose which, in the presence of alkali, is hydrolysed to hydroxy-acids and ammonia. Hence, in mixtures containing invert sugar, hydrocyanic acid figures will be low. 

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