羧甲半胱氨酸(S-CMC)是一种祛痰药。本文用氟离子选择性电极测定S-CMC与1-氟-2,4-二硝基苯(FDNB)的反应速率,并以溴化十六烷基三甲基铵(CTAB)为胶束催化剂。因此,为基础建立一种用于测定药剂中S-CMC的半自动动力学电位方法。该方法的突出优点是可用于混浊及深色样品的测定。样品制备用水稀释5.0ml液体制剂 Carboxymethyl cysteine ​​(S-CMC) is an expectorant. In this paper, the reaction rate of S-CMC and 1-Fluoro-2,4-dinitrobenzene (FDNB) was measured by fluoride ion selective electrode. Cetyltrimethylammonium bromide (CTAB) . Therefore, based on the establishment of a method for the determination of pharmaceutical S-CMC semi-automatic kinetic potential method. The outstanding advantage of this method is that it can be used for the determination of turbid and dark samples. Sample Preparation 5.0 ml of liquid formulation is diluted with water