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- W2023559738 abstract "A high performance liquid chromatographic procedure was developed to determine folic acid and its photodegradation products, p-aminobenzoic acid, pterine-6-carboxylic acid, p-aminobenzoyl-L-glutamic acid, and pteroic acid in the presence of riboflavin. The method involves reversed phase, paired-ion chromatography on mu-BondaPak C18 column using a UV detector (254 nm), and isocratic solvent system (at ambient temperature) comprising 0.017 M monobasic potassium phosphate, tetrabutyl ammonium hydroxide solution (20%, aqueous) and methanol (870:15:250, v/v). The range of quantitation for the individual compounds was found to be: p-aminobenzoic acid, 0.01 - 1.25 x 10(-5) M; pterine-6-carboxylic acid, 0.01-2.0 x 10(-5) M; p-aminobenzoyl-L-glutamic acid, 0.02-2.0 x 10(-5) M; pteroic acid, 0.02-2.5 x 10(-5) M; folic acid, 1.0-5.0 x 10(-5) M; riboflavin, 1.0-5.0 x 10(-5) M. Linear regression analysis of the data demonstrates adequate performance of the method in terms of accuracy and precision (R. S. D. 3%). The method is specific, rapid and convenient and has been applied to photodegradation studies of folic acid in the presence and absence of riboflavin." @default.
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- W2023559738 date "1997-09-01" @default.
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- W2023559738 title "High performance liquid chromatographic determination of folic acid and its photodegradation products in the presence of riboflavin" @default.
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- W2023559738 doi "https://doi.org/10.1016/s0731-7085(96)02028-6" @default.
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