海金沙为海金沙科植物海金沙 Lygodiumjaponicum(Thunb.)SW.的干燥成熟孢子。具有清热、利尿、通淋等功效。目前,较为常见的方法是用火试、水试、再结合显微检查来鉴别其真伪。本文在水试法的基础上,经过反复实验,用饱和氯化钠溶液进行悬降检查,取得一种较为可靠的去除杂质的方法。1 实验方法 在广州市内3家不同规模的药 Haijinsha is a dry and mature spore of Lygodiumjaponicum (Thunb.) SW. With heat, diuretic, Tonglin and other effects. At present, the more common method is to use fire test, water test, combined with microscopic examination to identify the authenticity. In this paper, based on the water test method, after repeated experiments, with a saturated sodium chloride solution for hanging drop inspection, to obtain a more reliable method to remove impurities. 1 Experimental methods Three different-scale drugs in Guangzhou