Guangzhou, China

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Xu R.,Peking Union Medical College | Wu J.,Peking Union Medical College | Wu J.,China Medicine Corporation | Liu Y.,Tianjin University | And 4 more authors.
Chemosphere | Year: 2011

The Quick Easy Cheap Effective Rugged and Safe multiresidue method (QuEChERS) has been validated for the extraction of 15 organochlorine pesticides (OCPs) in completely different matrices of traditional Chinese medicine (TCM). The method employed a rapid, simple and cost-effective procedure. The spiking levels for the recovery experiments were 0.1, 0.5 and 2.0mgkg-1. Mean recoveries mostly ranged between 76.0% and 114.0% (96.0% on average), and relative standard deviations (RSD) were generally below 10% (4.72% on average). Based on these results, the methodology has been proven to be highly efficient and robust and thus suitable for monitoring the MRL compliance of a wide range of commodity. The contamination status of 15 OCPs on 80 different TCMs marketed in China, and a total of 400 samples were also performed using a previously validated method. 15 OCPs were benzene hexachloride (BHC, including α-BHC, β-BHC, γ-BHC, δ-BHC), hexachlorobenzene, heptachlor, heptachlor epoxide, aldrin, p, p′-DDE, p, p′-DDD, o, p′-DDT, p, p′-DDT, mirex, endrin, dieldrin. This study indicates that the proposed method is useful for analyzing OCPs in TCM. © 2011.


Wu J.,Peking Union Medical College | Wu J.,China Medicine Corporation | Zhao R.,China Medicine Corporation | Chen B.,China Medicine Corporation | Yang M.,Peking Union Medical College
Food Chemistry | Year: 2011

Zearalenone (ZEA) is one of the most widely distributed mycotoxins produced by Fusarium species, responsible for important diseases of barley. The present work shows the results of a rapid and accurate method to quantify ZEA in barley. The method uses the Quick Easy Cheap Effective Rugged and Safe method (QuEChERS) for purification and high-performance liquid chromatography coupled with an evaporative laser scattering detector (HPLC-ELSD) for detection and quantification of the toxin. Barley samples were extracted with methanol and used acetonitrile-water-methanol (46:46:8, v/v) as mobile phase. Average recoveries of ZEA from barley spiked at levels of 0.1-10 μg/g ranged from 83.0% to 91.5%, with relative standard deviations of <6%. The detection limit was 1.56 ng/g based on a signal-to-noise ratio of 3:1. Using this method, we have analysed a total of 175 samples of 35 functional food marketed in China. The results showed that the overall level of ZEA contamination was relatively low (5.14%) and the presence of ZEA was found in nine samples at concentrations ranging from 11.09 to 26.54 ng/g. © 2010 Elsevier Ltd. All rights reserved.


Trademark
China Medicine Corporation | Date: 2012-03-06

Dietary and nutritional supplements; Dietary and nutritional supplements used for weight loss; Dietary supplement for eliminating toxins from the intestinal tract; Food supplements; Herbal supplements; Herbal teas for medicinal purposes; Medicinal drinks; Medicinal herb extracts; Medicinal herbal extracts for medical purposes; Medicinal herbs; Medicinal tea; Natural herbal supplements.


Trademark
China Medicine Corporation | Date: 2012-03-06

Dietary and nutritional supplements; Dietary and nutritional supplements used for weight loss; Dietary supplement for eliminating toxins from the intestinal tract; Food supplements; Herb teas for medicinal purposes; Herbal supplements; Herbal teas for medicinal purposes; Medicinal drinks; Medicinal herb extracts; Medicinal herbal extracts for medical purposes; Medicinal tea; Natural herbal supplements.


Trademark
China Medicine Corporation | Date: 2012-03-06

Dietary and nutritional supplements; Dietary and nutritional supplements used for weight loss; Dietary supplement for eliminating toxins from the intestinal tract; Food supplements; Herb teas for medicinal purposes; Herbal supplements; Herbal teas for medicinal purposes; Medicinal drinks; Medicinal herb extracts; Medicinal herbal extracts for medical purposes; Medicinal tea; Natural herbal supplements.


Trademark
China Medicine Corporation | Date: 2012-03-06

Dietary and nutritional supplements; Dietary and nutritional supplements used for weight loss; Food supplements.


Trademark
China Medicine Corporation | Date: 2011-12-27

Herb teas for medicinal purposes; Herbal supplements; Herbal teas for medicinal purposes; Natural herbal supplements.


Trademark
China Medicine Corporation | Date: 2012-01-10

Herb teas for medicinal purposes; Herbal supplements; Herbal teas for medicinal purposes; Natural herbal supplements.


Trademark
China Medicine Corporation | Date: 2012-01-10

Herb teas for medicinal purposes; Herbal supplements; Herbal teas for medicinal purposes; Natural herbal supplements.


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