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- W2735548890 abstract "An efficient HPLC–DAD method was developed for simultaneous determination of eight adulterants in weight management supplements and herbs. The eight adulterants were phenolphthalein, sibutramine, nuciferine, and five anthraquinone compounds including aloe-emodin, rhein, emodin, chrysophanol, and physcion. The analytes were ultrasonically extracted with 70% (v/v) methanol aqueous solution followed by centrifugation. The supernatant was subjected to HPLC analysis. A Phenomenex Luna C18 column was applied for chromatographic separation. The mobile phase was consisted of methanol and aqueous solution of 0.05% (v/v) phosphoric acid–0.025% (m/v) sodium dodecyl sulfonate. The flow rate of mobile phase was 0.8 ml min−1 with gradient elution. Clenbuterol and ibuprofen were used as internal standards. The retention times and the characteristic UV spectrograms were used for qualitative analysis. Quantifications were based on the internal standard curves. Good linearities (r > 0.9996) for all analytes were obtained with the intra- and inter-day precision (n = 6) ranging from 0.76 to 5.9% and 0.90 to 8.1%, respectively. The average recoveries from the spiked samples with different matrices varied from 73.4 to 114%. Validations were subsequently performed using LC–MS/MS. The proposed method successfully determined the target adulterants in eight commercial weight management supplements and five weight reducing herbs with satisfactory results." @default.
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- W2735548890 date "2017-07-21" @default.
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- W2735548890 title "Simultaneous determination of eight adulterants in weight management supplements and herbs by HPLC–DAD and LC–MS/MS" @default.
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- W2735548890 doi "https://doi.org/10.1080/10826076.2017.1343730" @default.
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