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Determination of Total Safflower Yellow Pigments in Carthamus tinctorius L. by Dynamic Ultrasonic Extraction Coupled with On-line Spectrophotometric Detection

HU Xiu-Li1,2, YOU Jing-Yan1, ZHANG Han-Qi1, ZHANG Hua-Rong1, MENG Xiang-Zhe1, XIAO Ting-Ting1, FAN Yu-Zhen1, WANG Ying1, YU Ai-Min1*   

    1. College of Chemistry, Jilin University, Changchun 130012, China;
    2. College of Pharmacy, Jilin University, Changchun 130023, China
  • Received:2007-10-11 Revised:1900-01-01 Online:2008-04-10 Published:2008-04-10
  • Contact: YU Ai-Min

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Abstract: A dynamic ultrasonic extraction(DUE) coupled with on-line detection by spectrophotometry was proposed for the determination of total safflower yellow pigments(calculated against safflor yellow A) in Carthamus tinctorius L. The extraction was performed in a common self-made extraction vessel placed inside an ultrasonic bath and a peristaltic pump was used to deliver the solvent. Several parameters of DUE, including flow rate of extraction solvent, ultrasonic power and sample amount, were optimized. Compared to the off-line method, the on-line approach has the advantages of minimum sample amount(5 mg), on-line monitoring the extraction process and time-saving(10 min) and the method is more convenient for rapid optimization of the extraction process.

Key words: Dynamic ultrasound-assisted extraction, On-line detection, Safflower yellow pigments, Carthamum tinctorius L.

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