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| Simultaneous determination of preservatives content in Chinese herb syrups by gas chromatography |
| Hits 1802 Download times 1704 Received:November 28, 2012 |
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| DOI
10.11656/j.issn.1673-9043.2013.01.11 |
| Key Words
chromatography;GC;preservatives;syrups |
| Author Name | Affiliation | | ZHAO Pei-li | Tianjin University of TCM, Tianjin 300193, China | | WU Jing-ming | Tianjin University of TCM, Tianjin 300193, China | | ZHANG Yi | Tianjin University of TCM, Tianjin 300193, China | | HAN Xiao-yan | Tianjin University of TCM, Tianjin 300193, China | | WU Li-ping | Tianjin University of TCM, Tianjin 300193, China |
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| Abstract
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| [Objective] To establish a method for determination of 3 preservatives, benzoic acid, sorbic acid and ethyl-paraben in Chinese herb syrups simultaneously by gas chromatography. [Methods] The Chinese herb syrups sample was dissolved by methanol, extracted by ultrasonic and separated by packed column of DB-1(30 m×0.25 mm×0.25 μm). [Results] The concentrations of 3 preservatives showed a positive correlation with the peak heights at 10～100 μg/mL for sorbic acid, 10～100 μg/mL for benzoic acid and 5～50 μg/mL for ethyl-paraben. The correlative coefficients were 0.996 9～0.997 9. The detection limits were 1.2, 1.8 and 0.7 μg/mL respectively. The recovery rates were 95.4%～103.7%. RSDs were 2.9%～3.7%. [Conclusion] The present method mentioned above can perfectly separate these three preservatives with some advantages, such as simple, accurate, sensitive and quick. |
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