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海水中溴离子气相色谱测定法的研究
崔仙舟, 王中柱, 徐格, 贾烨
青岛海洋大学化学系 266003

摘要:

研究了用气相色谱测定海水及天然水中溴离子含量的方法,确定了最佳条件。天然海水,稀释200倍后;取10ml稀释水样,用氯胺T为氧化剂,将Br^-氧化为溴,在六次甲基四胺催化的条件下,溴与丁酮反应生成溴代丁酮;用环已烷萃取后,用ECD检测器测定。此方法简便快速,对溴离子含量较低的天然水尤为适用。方法与碘量法相对照,取得满意结果。

关键词: 色谱海水溴离子

DOI：

分类号:

基金项目:

STUDY ON THE DETERMINATION OF BROMIDE CONCENTRATION IN SEAWATER BY GAS CHROMATOGRAPHIC METHOD

Cui Xianzhou, Wang Zhongzhu, Xu Ge, Jia Ye

Department of Chemistry, Ocean University of Qingdao 266003

Abstract:

In this paper, a gas chromatographic method for the determination of bromide concentration in natural water and seawater Was reported. Seawater sample was diluted 200 times with pure water. Chloramine-T as a oxidant was added into the diluted seawater sample to dissociate Br, which can react with butanone and produce bromobutanone. In this reaction, hexamethy lenetetramine was used as a catalyst. Bromobutanone was extracted from the solution with cyclohexane and determined by ECD detector. Other natural water, such as riverwater and groundwater which contain trace bromide can be determined directly without diluting. This method was simple, convenient and fast. Experimental result, compared with volumetric analysis, was satisfactory. It is very applicable for determination of large batch of sample water.

Key words: Chromatography, Seawater, Bromide

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