Analysis of Anionic Toxic Matter by Photometric Ion Chromatography

Yamamoto, Atsushi; Matsunaga, Akira; Makino, Masao; Hayakawa, Kazuichi; Miyazaki, Motoichi

doi:10.1248/jhs1956.33.p17

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1997

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“…Spectrophotometric [2,3], gas chromatographic [4][5][6] or HPLC methods with RP C18 columns [7][8][9][10] have been developed to determine sorbates in wines. When chromatographic methods are used, the sample is normally purified with SPE columns [11,12] or by liquid-liquid extraction [13,14]. Sample purification lengthens the overall analysis time, increases the costs and decreases the accuracy and reproducibility.…”

Section: Introductionmentioning

confidence: 99%

Determination of sorbic acid in wines with a hydrogen sulfonated divinyl benzene-styrene copolymer HPLC column

Amati

Castellari

Ensini³

et al. 1997

Chromatographia

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SummaryA method is proposed for the determination of sorbic acid in wines using a hydrogen sulfonated divinyl benzene-styrene copolymer (DVB-H) HPLC column and isocratic elution with 0.01N H2SO4: CH3CN (75:25). UV detection at 258 nm permits analysis by direct injection of white and red wines without significant interfererice between the peaks of sorbic acid and other sample components. The limit of detectability of the method is 0.01 mg L -1 with an average recovery of 99.6 % and an average %RSD of 0.87. Analyses of 30 wine samples by the proposed method and the official EEC spectrophotometric method show that there is a good correlation between the results of the two methods, although the HPLC analyses are clearly more precise and accurate.

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Section: Introductionmentioning

confidence: 99%