主题：【已应助】求助英文文献5篇，请帮帮忙，谢谢啦！

【篇  号】：1
【题  名】：Characterization of flavonoids by aluminum complexation and collisionally activated dissociation
【作  者】：Junmei Zhang1, Junmei Wang2, Jennifer S. Brodbelt1,*
【期刊名全称】：Journal of Mass Spectrometry
【文献页码】：Volume 40, Issue 3, pages 350–363, March 2005 
【全文链接】: http://onlinelibrary.wiley.com/doi/10.1002/jms.793/abstract;jsessionid=A84ABA766D952773EE3CC48824F8698C.d03t04?systemMessage=Wiley+Online+Library+will+be+unavailable+17+Dec+from+10-13+GMT+for+IT+maintenance.

【篇  号】：2
【题  名】：Spectrophotometric Determination of Quercetin
【作  者】：L. E. Dowd, ;
【期刊名全称】：Anal. Chem.,
【文献页码】：1959, 31 (7), pp 1184–11875
【全文链接】: http://pubs.acs.org/doi/abs/10.1021/ac60151a033

【篇  号】：3
【题  名】：Sensitive Spectrophotometric Assay for 3-Hydroxy-Substituted Flavonoids, Based on Their Binding with Molybdenum, Antimony, or Bismuth
【作  者】：Palaniswamy Viswanathan, Venkataraman Sriram, and Ganesa Yogeeswaran*.
【期刊名全称】：.J. Agric. Food Chem., .. , .,
【文献页码】：  2000, 48 (7), pp 2802–2806
【全文链接】: http://pubs.acs.org/doi/abs/10.1021/jf990357q

【篇  号】：4
【题  名】：Flavonoids in Pigmented Orange Juice and Second-Pressure Extracts
【作  者】：Ugo Leuzzi,*† Corrado Caristi,† Vincenza Panzera,† and Gianvincenzo Licandro‡
【期刊名全称】：J. Agric. Food Chem.,
文献页码】：2000, 48 (11), pp 5501–5506
【全文链接】:http://pubs.acs.org/doi/abs/10.1021/jf000538o

【篇  号】：5
【题  名】：Comparison of Methods for the Exhaustive Extraction of Hypericins, Flavonoids, and Hyperforin from Hypericum perforatum L.
【作  者】：Andrija Smelcerovic, Michael Spiteller,* and Sebastian Zuehlke;
【期刊名全称】：J. Agric. Food Chem., ,
【文献页码】：2006, 54 (7), pp 2750–2753
【全文链接】: http://pubs.acs.org/doi/abs/10.1021/jf0527246