The content of involatile impurities in acetamidine hydrochloride was determined by gravimetric analysis.

采用析法测定盐酸乙脒中难挥发质的含。

METHODS Sodium tetraphenylboron gravimetric analysis was replaced by highly-accurate nephelometric titrimetry to determine potassium chloride in Compound sodium chloride injection.

方法用高精散射定法代替四苯硼钠法。