Comparação de técnicas de determinação de ésteres em cachaça

Química Nova

Eduardo S. P. Nascimento¹  Daniel R. Cardoso¹  Douglas W. Franco¹ 

[1] ,Universidade de São Paulo Instituto de Química de São Carlos Departamento de Química e Física MolecularSão Carlos SP ,Brasil

关键词: esters;    cachaça;    GC/MS;   

DOI  :  10.1590/S0100-40422009000900016

来源: SciELO

【 摘 要 】

An analytical comparison of three different techniques for quantitative profile of esters in cachaça is reported. The Ministério da Agricultura Pecuária e Abastecimento (MAPA) recommends the use of GC/FID or volumetry. Despite being laborious and lacking in chemical speciation, the volumetric technique for total ester content shows to be appropriate, reproducible, and accurate for the analysis of cachaça. However, the GC/FID suggested by MAPA, considering only ethyl acetate, shows inaccuracy, underestimating the total ester content by a median factor of 72%, mainly due to the absence of ethyl lactate analysis. On the other hand, the GC/MS technique that comprises the analysis and speciation of nine esters, including ethyl lactate, proved to be reproducible, simple, fast and accurate for the analysis of total ester content in cachaça. Thus, the total ester content results obtained using GC/FID must be considered with precaution.

【 授权许可】

CC BY-NC   
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