Three batches of Ginkgo biloba leaf extracts which were supplied by two raw material suppliers (two batches were supplied by Jiangsu Beisikang Pharmaceutical Co., Ltd., Xuzhou, China; and one batch was supplied by Zhejiang Conba Pharmaceutical Co., Ltd., Hangzhou, China) were used as active pharmaceutical ingredients (API). The polyethylene glycol (PEG) 4000 (supplied by Wanbangde Pharmaceutical Group, Wenling, China) was used as an excipient. The dimethyl silicone oil was used as condensing oil (purchased from Jiangxi Alpha Hi‐tech Pharmaceutical Co., Ltd., Pingxiang, China).
The width of the droplets was measured using a laser micrometer (KEYENCE IG‐028, Shanghai, China) which is equipped with a sensor amplifier (KEYENCE IG‐1000, Shanghai, China). The data acquisition was performed using a data acquisition card (National Instrument cDAQ‐9171, Shanghai, China). The homogenous dispersing liquid was prepared using a circulating oil bath (Greatwall Scientific SY‐20, Zhengzhou, China) and an electric mixer (Zhengrong instrument ES‐60 M, Changzhou, China). The preparation of dripping pills was performed using a dripping device (Anruikang, Beijing, China). The dripping pills were weighed using an electronic balance (Mettler Toledo AE240, Shanghai, China).
The width of the droplets was measured using a laser micrometer (KEYENCE IG‐028, Shanghai, China) which is equipped with a sensor amplifier (KEYENCE IG‐1000, Shanghai, China). The data acquisition was performed using a data acquisition card (National Instrument cDAQ‐9171, Shanghai, China). The homogenous dispersing liquid was prepared using a circulating oil bath (Greatwall Scientific SY‐20, Zhengzhou, China) and an electric mixer (Zhengrong instrument ES‐60 M, Changzhou, China). The preparation of dripping pills was performed using a dripping device (Anruikang, Beijing, China). The dripping pills were weighed using an electronic balance (Mettler Toledo AE240, Shanghai, China).