Dynamic microwave-assisted extraction coupled with on-line spectrophotometric determination of safflower yellow in Flos Carthami |
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Authors: | Chen Ligang Ding Lan Zhang Huarong Li Juan Wang Yutang Wang Xiupin Qu Chenling Zhang Hanqi |
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Affiliation: | College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China |
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Abstract: | A rapid dynamic microwave-assisted extraction and on-line detection by spectrophotometry is proposed for the determination of safflower yellow in Flos Carthami. A high pressure and a peristaltic pump were used to deliver the solvent. A TM010 microwave resonance cavity was applied to concentrate the microwave energy and the forward power about 60 W was enough for the extraction. Other extraction conditions also were examined and optimized. In this work, the extraction process can be monitored by measuring the absorption of safflower yellow in the extract, which would be convenient for rapid optimization of the extraction process. The detection and quantification limits are 8 and 27 μg mL−1, respectively. The within-day and between-day precision (R.S.D.) are 1.6-3.2% and 2.8-4.2%, respectively. Compared with off-line detection, the proposed method may provide more rapid measurement and is more convenient for obtaining continuous measurements. |
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Keywords: | Dynamic microwave-assisted extraction On-line detection Safflower yellow Flos Carthami |
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