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- W2381040670 abstract "A method of field amplified sample injection with capillary electrophoresis was developed for the analysis of benzoic acid and sorbic acid in peroral preparations of Chinese herbal medicine.The separation was achieved on a fused-silica capillary column(50.2 cm×75 μm,effective length: 40 cm) using pH 9.5 50 mmol/L Na2B4O7 as a running buffer with an applied voltage of 20 kV and a cartridge temperature of 25 ℃.The PAD detection wavelength was set at 228 nm,and 3.45 kPa×5 s water plug was introduced from the anode before injection.Sample was injected with electrokinetic injection by-10 kV×3 s.The calibration curves of sorbic acid and benzoic acid were linear in the range of 0.5-20.0 mg/L with correlation coefficients more than 0.995.The limits of detection were 0.67 μg/L for benzoic acid and 0.53 μg/L for sorbic acid.The stacking multiples(counting by peak area)of benzoic acid and sorbic acid were 259.7 and 231.9,respectively.Under the optimal condition,the proposed method was applied in the determination of benzoic acid and borbic acid in the peroral preparations of Chinese herbal medicine with recoveries of 98%-103% for benzoic acid and 100%-101% for sorbic acid.This method was simple,rapid,accurate and sensitive,and could be used to determine the content of preservatives in biological sample." @default.
- W2381040670 created "2016-06-24" @default.
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- W2381040670 date "2010-01-01" @default.
- W2381040670 modified "2023-09-23" @default.
- W2381040670 title "Determination of Benzoic Acid and Sorbic Acid in Peroral Preparations of Chinese Herbal Medicine by Field Amplified Sample Injection with Capillary Electrophoresis" @default.
- W2381040670 hasPublicationYear "2010" @default.
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