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水试法是利用某些药材在水中的各种特殊变比鉴别中药真伪优劣。笔者收集常用下列中药以水试鉴别,供同道参考。 1.番红花入水浸泡后,柱头膨胀,呈长喇叭状,用棒搅动,不易碎断,水被染成黄色。伪品或掺假者,水溶液常呈红色或橙黄色,水面常有油状物飘浮或有沉淀。 2、琥珀不溶于水,加水煮沸不溶化、不变软。否则可能是其它树脂。 3、牛黄少许投入水中,可见其吸水而不变形。若入水迅速膨胀而崩解者则为伪品. 4、牛黄少许加水放入玻璃器皿中煮沸后静置,真品全部溶化,但水不混浊,色黄棕,无沉淀
The water test method is to use various kinds of medicinal materials in the water to identify the quality of traditional Chinese medicines. The author collects the following traditional Chinese medicines for water test identification for reference. 1. After saffron is soaked in water, the stigma is inflated and is in the form of a long horn. It is stirred with a stick and is not easily broken. The water is dyed yellow. For counterfeits or adulterants, the aqueous solution often appears red or orange, and the oil often floats or precipitates on the surface. 2, amber is insoluble in water, add boiling water insoluble, not soft. Otherwise it may be other resins. 3, a little bit of bovine water, it can be seen without water absorption deformation. If the water rapidly expands and disintegrates, it is a counterfeit product. 4. Add a little bovine water to the glassware and let it stand still after boiling. The whole product is melted, but the water is not turbid, the color is yellowish-brown, and there is no precipitation.