Abstract
The separating determination method of the preservatives by use of the column of DOWEX 2X8-Action (strongly basic ion-exchange resin) was studied. As the eluents, the acetic acid mixed with methanol of the various concentrations were used selectively. The results obtained from the experiments are as follows:
1) For eight examples of the mixed preservatives, the favourable separating conditions of their ingredients have been accomplished.
2) It was unsuitable to employ the column of DOWEX 2X8-Cl- form for the purpose of separating dehydroacetic acid and sorbic acid or butyl p-hydroxy benzoate and benzoic acid, but these mixture of the preservatives could be separated easily by use of the column of DOWEX 2X8-Ac- form
3) The interference by the decomposed product from sugar, vanillin and ethyl vanillin could be entirely removed from the preservatives.
