1.The content of involatile impurities in acetamidine hydrochloride was determined by gravimetric analysis.
采用分析法测定盐酸乙脒中难挥发杂质的。
2.METHODS Sodium tetraphenylboron gravimetric analysis was replaced by highly-accurate nephelometric titrimetry to determine potassium chloride in Compound sodium chloride injection.