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含碘喉片是一种普通的常用药,不同省区的地方标准片剂处方略有不同,但测定碘含量的方法都采用硷熔破坏有机物→加溴水氧化成KIO_3→加过量KI析出I_2→Na_2S_2O_3标准液滴定的方法。此法操作繁琐、费时,测定结果偏低,虽加大取样量,但测定误差仍很大、天津药品标准规定百分标示量为85～105％(95±10％),上海药品标准规定为90—110％。为此试用电极法测定含碘喉片中的碘,实验证明不仅手续简便快速,而且准确度、精密度都比原法提高。
Iodine throat tablets is a common drug commonly used in different provinces and local prescriptions are slightly different prescription, but the determination of iodine content methods are used alkaline melting organic matter → add bromine water into KIO_3 → excess KI precipitation I_2 → Na 2 S 2 O 3 standard titration method. This method is cumbersome, time-consuming, low measurement results, although increased sample size, but the measurement error is still large, the Tianjin drug standards for the percentage labeled amount of 85 to 105% (95 ± 10%), the Shanghai drug standards for 90-110%. For this test electrode method for determination of iodine throat iodine tablets, experiments show that not only simple and quick procedures, and accuracy, precision than the original method to improve.