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Determination of di-(2-ethylhexyl) sodium sulfosuccinate and related dialkyl esters in aqueous solutions by the ferric hydroxamate procedure.

Abstract Di-(2-ethylhexyl) sodium sulfosuccinate and its closely related calcium salt, di-( n -octyl) isomer, and di-( n -hexyl) derivative have shown excellent quantitative response to the ferric hydroxamate reaction under controlled conditions. Their diester structures make them extremely susceptible to attack by the reagent, while hydrolysis is inhibited by the reaction conditions. Optimum conditions for successful determination have been elucidated for the compounds mentioned.