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采用卡氏水分滴定法测定了阿胶中的水份。平均回收率为９９．７±２．２％（Ｐ＝０．９５，ｎ＝４）。该法简便、快速、准确，能适用于胶类药物的成品及半成品的质量控制。
The water content in donkey-hide gelatin was measured by Karl Fischer water titration. The average recovery was 99.7±2.2% (P=0.95, n=4). The method is simple, rapid and accurate, and can be applied to the quality control of finished products and semi-finished products of plastic drugs.