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选择了四氮杂大环铜催化的BZ化学振荡体系来测定对氨基水杨酸钠。该体系为:NaBrO3-苹果酸-H2SO4-[CuL](ClO4)2体系,其中L为5,7,7,12,14,14-六甲基-1,4,8,11-四氮环杂十四-4,11-二烯。在实验中我们发现对氨基水杨酸钠的加入明显的改变了振荡体系的振幅和周期,浓度的对数与振幅的改变值A在4.97×10-7～1.96×10-4mol/L的浓度范围内呈现良好的线性关系。校正因子r=0.991 5,检测下限为1.96×10-7mol/L,相对标准偏差为4.6%。因此,我们建立了一种BZ化学振荡法测定对氨基水杨酸钠含量的分析方法,同时研究了该振荡体系和对氨基水杨酸钠之间的作用机理。
Selected tetraazacyclonuccine copper-catalyzed BZ chemical oscillation system for the determination of sodium aminosalicylate. The system is: NaBrO3-malic acid-H2SO4- [CuL] (ClO4) 2 system, wherein L is 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclo Heterotetra-4,11-diene. In the experiment, we found that the addition of sodium aminosalicylate significantly changed the amplitude and period of the oscillating system. The logarithm of the concentration and the change of amplitude A were between 4.97 × 10-7 ~ 1.96 × 10-4mol / L Range showed a good linear relationship. Correction factor r = 0.991 5, detection limit of 1.96 × 10-7mol / L, the relative standard deviation of 4.6%. Therefore, we established a method for the determination of sodium aminosalicylate by BZ chemical oscillation method, and studied the mechanism of action between the oscillating system and sodium p-aminosalicylate.