Bromate determination in flour improvers by ion exchange chromatography with spectrophotometric detection

Química Nova

Nascimento Filho, Irajá do¹  Maroneze, Aline Machado¹  Zanella, Renato¹  Dallago, Rogério Marcos¹  Universidade Regional Integrada do Alto Uruguai e Missões¹  Universidade Federal de Santa Maria, Santa Maria¹ 

关键词: bromate;    flour improver;    ion exchange chromatography.;   

DOI  :  10.1590/S0100-40422005000400027

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

KBrO3 is registered by the FAO/OMS as a genotoxic and carcinogenic compound. In spite of this, KBrO3 is still employed by Brazilian bakeries. Nowadays ion exchange chromatography (IEC) is the most rapid and trustful method for BrO3- analysis. When at high concentrations, chloride ions can interfere in the BrO3- analysis, if the detection is performed by electrical conductivity. On the other hand, spectrophotometric detection, presented here is based on the absorption of BrO3- in the ultraviolet region (210 - 230 nm) where the absortion of chloride ions is very low, thus making possible the qualitative and quantitative analysis of BrO3- in flour improver samples.

【 授权许可】

Unknown