Determinação de bromato em melhoradores de farinha por cromatografia de troca iônica com detecção espectrofotométrica

Química Nova

Rogério Marcos Dallago²  Irajá Do Nascimento Filho²  Renato Zanella¹  Aline Machado Maroneze¹ 

[1] ,Universidade Regional Integrada do Alto Uruguai e Missões Curso de Química Centro Tecnológico

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

DOI  :  10.1590/S0100-40422005000400027

来源: SciELO

【 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】

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