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

采用重量分法定盐酸乙脒中难挥发质的含量。

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

方法用高精光滴定法代替四苯硼钠重量法。