《中国药典》一九七七年版收载的桑菊感冒片鉴别项下第二项中规定:取本品粉未约一克,加石油醚五毫升,浸渍十五分钟,时加振摇,滤过,滤液挥尽石油醚,残渣加香草醛试液二至三滴,即显棕色,放置,逐渐变成红紫色。该项使用的‘香草醛试液’在该药典附录‘试液’项下规定为‘百分之一香草醛的盐酸溶液’。该反应系检查产品中含有的挥发油、酚类甾体、高级醇等成分的。我们在反复试验中发现该项鉴别的反应均不太明显。我们收集了外地药厂和本厂生产的好几批桑菊感冒片,检验了二十多个批次,由于产生的淡红紫 In the second item of the Sangju Cold Tablet identified in the 1987 edition of the Chinese Pharmacopoeia, it is stipulated in the second item of the “Sangju Cold Mask” test item that the powder is not about one gram, five milliliters of petroleum ether is added, and it is immersed for fifteen minutes. Filtration, the filtrate flew away petroleum ether, the residue plus two to three drops of vanillin test solution, that was brown, placed, and gradually become red and purple. The ‘vanillin test solution’ used in this item is defined as a ’1% vanillin solution in hydrochloric acid’ under the pharmacopoeial appendix ’Test solution’. This reaction checks the volatile oils, phenolic steroids, and higher alcohols contained in the product. We found in the trial and error that the differential reaction was not obvious. We collected several batches of Sang Ju cold tablets produced by foreign pharmaceutical companies and our factory and inspected more than 20 batches due to the production of pale purple