糙米含溴测定方法的研究

以含溴熏蒸剂作为粮俗储存杀虫剂，在有乙醇存在的碱性介质中，含溴熏蒸剂中的溴被转化为无机溴部分残留在粮食谷中。这种无机溴超过限量，人食用后就会影响到健康。因此，它在粮俗中的残留量越来越被人们关注。日本规定，糙米中的无机溴含量不得超过50mg/kg。现在摆在面前的是如何简便、快速、准确地糙米中无机溴的含量问题。此次试验运用带电导检测器的离子色谱进行分析测定的方法，在Dionex AS4A分离柱上，用1．0mmol/LNaCHO3/20mmol/L Na2CO3作为流动相进行洗脱，使被测组份获得满意的分离，方法简便、快速。用于对实际糙米样品中微量总溴的测定，达到了理想结果。因此，可以析方法推广应用。

Study on the Detection Method of Bromine Content in Brown Rice

In an alkline medium with alcohol, Bromine in the fumigant as pesticide for grain store is transformed to inorganic form and partly remained in the grains. If this kind of inorganic Bromine content exceed the limit, human health will be impacted.Therefore, the remained content of Bromine is increasingly concerned by human. In Japan, the regular limit of inorganic Bromine content in brown rice is 50mg/kg.Now, the problem facing to us is how to determine, in a easy, rapid and accurate way, the Bromine content in brown rice.In this experiment, the Bromine content is determined with Ion chromatography attached by conductivity gauge.On the Dionex AS4A seperating pillar, the tested ingredients are fully washed to separate by using 1.0mmoI/L of NaHC03/2.0mmol/L of Na2CO3 as the flowing medium.The easy and rapid method can give a satisfactory result. Therefore, this new method can be popularized.