药物及其它食品中抗坏血酸含量的分析,一般多用碘量法,这种方法存在着标准碘液不稳定,灵敏度低,适用范围窄等缺点,不能用于低含量的分析。离子选择性电极分析法多用于无机离子的直接测定,近年来虽然有人试图将其用于有机物的测定,但大都限于测定含有特定无机离子的有机物。日本虽然报道了用碘离了选择电极指示,电位滴定法测定抗坏血酸等有机物,但操作费时且对测定条件(如仪 Drugs and other foods ascorbic acid content analysis, the general use of iodine method, this method there is a standard iodine instability, low sensitivity, the narrow scope of application, can not be used for low-level analysis. Ion-selective electrode analysis is often used for the direct determination of inorganic ions. Although it has been attempted to use it for the determination of organic compounds in recent years, it is mostly limited to the determination of organic compounds containing specific inorganic ions. Although Japan has reported the use of iodine selective electrode instructions, potentiometric titration of organic matter such as ascorbic acid, but the operation is time-consuming and the measurement conditions (such as instrument