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Ion-Pair High Performance Liquid Chromatographic Retention Behavior of Salicylic Acid and Its Derivatives
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1999, v.12 no.3, pp.203-208
Lee,
K., Chung,
Y., &
Oh,
S.
(1999). Ion-Pair High Performance Liquid Chromatographic Retention Behavior of Salicylic Acid and Its Derivatives. Analytical Science and Technology, 12(3), 203-208.
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Abstract
The ion-pair high performance liquid chromatographic elution behavior of salicylic acid and its derivatives was studied with measuring capacity factor, k', changing the concentration of ion-pairing reagent (tetrabutylammonium chloride, TBACl) in mobile phase. As a result, it was found that k' of the samples increase at pH 7.2 as the TBACl concentration increases. The derivatives of salicylic acid were separated each other at an optimum mobile phase condition which was found from the observation of the retention behavior. The optimum mobile phase condition was methanol solution(<TEX>$MeOH:H_2O_2$</TEX> 30:70) containing 20 mM TBACl for the determination of salicylic acid and methanol solution(<TEX>$MeOH:H_2O_2$</TEX> 20:80) containing 40 mM TBACl for p-aminosalicylic acid at pH 7.2. The method has been applied for the analysis of the contents of salicylic acid derivatives in an aspirin tablet and a tuberculosis curing agent.
- keywords
- salicylic acid and its derivatives, ion-pair high performance liquid chromatography
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