Acetaldeído (CAS 75-07-0) é uma impureza carbonílica comum em bebidas fermentadas | solventes e matérias-primas químicas que afeta estabilidade | odor e reatividade de formulações. De caráter volátil e reativo | promove oxidação | polimerização e formação de acetais com álcoois | alterando rendimento e propriedades sensoriais. A sua quantificação é crítica para controle de qualidade e é tipicamente realizada por cromatografia gasosa com headspace | HPLC com derivatização ou espectrometria de massa. Limites de traço e procedimentos de amostragem devem considerar perda por volatilização e reações secundárias. Estratégias de controle incluem purificação por destilação fracionada | neutralização e monitorização contínua.
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