我们选用ZYT-1(90改进)型自动永停滴定仪测定盐酸普鲁卡因注射液含量,报道如下。 1 实验材料 0.5％、1％、2％盐酸普鲁卡因注射液:本院灭菌制剂室生产。 2 实验方法 2.1 取样品按中国药典1985年版“永停滴定法”用自动永停滴定仪进行自动滴定。滴定时将仪器上极化电压置50mV档,灵敏度(A)置10~(-9)档,门限值置70档。 2.2 取样品按中国药典1977年版方法(应用中性红指示剂指示终点),由实验人员操纵 We use ZYT-1 (90 improved) type automatic stop titration Determination of procaine hydrochloride injection, reported as follows. 1 Experimental material 0.5%, 1%, 2% procaine hydrochloride injection: Our hospital sterilization preparation room production. 2 Experimental Methods 2.1 Take samples according to the Chinese Pharmacopoeia 1985 edition of “permanent stop titration” with automatic stop titrator automatic titration. Titration set the instrument polarization voltage 50mV file, sensitivity (A) set 10 ~ (-9) file, the threshold set at 70 files. 2.2 samples taken by the Chinese Pharmacopoeia 1977 version of the method (the use of neutral red indicator end of the instruction), manipulated by the experimenter