方法：采用永停滴定法。
目的：探讨永停滴定法测定盐酸丁卡因注射液含量时采用不同灵敏度对含量测定的影响。
Objective: to evaluate the effect of instrument sensitivity on the concentration determination of tetracaine hydrochloride injection using dead - stop titration method.
方法：采用永停滴定法，HPLC法分别测定不同批号的感冒清片的对乙酰氨基酚含量。
Methods: the paracetamol contents of the different samples of Ganmaoqing Tablets were determined by the dead stop titration and HPLC, respectively.
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