The levels of the allergen ginkgolic acid in 13 of the samples were between 16 and 733 times in exceed of the WHO's spec在其中十三个样本，银杏酸含量超出世界卫生组织所定下的标准十六倍至七百三十三倍。
A HPLC method for determination of ginkgolic acid in extract of Ginkgo biloba leaves (EGb) was presented.建立了 HPLC法检测银杏叶提取物中银杏酸含量的方法。