KIO_3-I_2氧化法同时测定TU,TD和TT

Simultaneous determination of TU,TD and TT by KIO_3-I_2 oxidation method

以I2和KIO3为氧化剂,建立了同时测定硫脲(TU),二氧化硫脲(TD)和三氧化硫脲(TT)的方法。强酸性条件下,用I2氧化TU;适当酸度条件下,用KIO3氧化TU和TD;强碱性条件下用I2氧化TU,TD和TT。方法已用于合成样品和TD结晶母液的分析。

Using I2 and KIO3 as oxidizers, a method for simultaneous determination of thiourea （TU）, thiourea dioxide （TD） and thiourea trioxide （aminoiminomethansulfon acid, TT） has been established. The TU is oxidized by I2 under the condition of strong acid. The TU and TD are oxidized by KIO3 under the condition of appropriate acidity. The TU and TD and Tr are oxidied by I2 under strong basic condition. This method has been used to analyse the synthesic samples and mother solution of TD crystal. The results are satisfactory.