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• W2099245416 abstract "A chiral capillary electrophoretic method with nearly full p H window was explored for the separation and determination of dl ‐penicillamine. A facile one‐pot labeling technique was coupled in the method for introduction of chromophore and charge groups onto the analytes to facilitate the electromigration and sensitive detection. By using simply a cost‐effective neutral β‐cyclodextrin as chiral selector, baseline separation of the dl ‐penicillamine was achieved from p H 2.0 to over p H 10. Quantification of standard d ‐ and l ‐penicillamines was demonstrated by taking p H 4.5, 7.4, and 9.7 as the representatives of acidic, neutral, and basic conditions. The working curves were constructed between peak area and concentration, having linear ranges of 8.56–8.56 × 10 2 μg/mL for pH 4.5 and 8.56–1.71 × 10 3 μg/mL for pH 7.4 and 9.7, with correlation coefficients all better than 0.999. The limit of detection (S/N = 3) was 2.58 μg/mL in acidic and neutral conditions or 1.41 μg/mL in basic condition. The method was further validated by assaying the commercial penicillamine tablets, applicable to quantification of the effective enantiomer and the trace impurity of l ‐penicillamine at a content of down to 0.2, 0.6, and 2.0% for pH 9.7, 4.5, and 7.4, respectively. The recovery determined by spiking technique was in a range from 93.1 to 105 %. The method is easily extendable to the analysis of other chiral amines or amino acids." @default.
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• W2099245416 date "2012-07-01" @default.
• W2099245416 modified "2023-09-30" @default.
• W2099245416 title "Separation and determination of chiral composition in penicillamine tablets by capillary electrophoresis in a broad pH range" @default.
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• W2099245416 doi "https://doi.org/10.1002/elps.201200046" @default.
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