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Rapid method for the determination of 5-hydroxymethylfurfural and levulinic acid using a double-wavelength UV spectroscopy.
Zhang, Junhua; Li, Junke; Tang, Yanjun; Xue, Guoxin.
Afiliação
  • Zhang J; Engineering Research Center for Eco-Dyeing and Finishing of Textiles, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China ; Key Lab. of Biomass Energy and Material, Nanjing 210000, China.
ScientificWorldJournal ; 2013: 506329, 2013.
Article em En | MEDLINE | ID: mdl-24228006
This study reports on a rapid method for the determination of levulinic acid (LA) and 5-hydroxymethylfurfural (HMF) in acid hydrolyze system of glucose based on UV spectroscopy. It was found that HMF and LA have a maximum absorption at the wavelengths of 284 nm and 266 nm, respectively, in a water medium, and the absorptions of HMF and LA at 284 nm and 266 nm follow Beer's law very well. However, it was found that a major spectral interference species will arise in the quantification of HMF and LA; nonetheless, this interference can be eliminated through the absorption treatment of charcoal. Therefore, both HMF and LA can be quantified with a double-wavelength technique. The repeatability of the method had a relative standard deviation of less than 4.47% for HMF and 2.25% for LA; the limit of quantification (LOQ) was 0.017 mmol/L for HMF and 4.68 mmol/L for LA, and the recovery ranged from 88% to 116% for HMF and from 94% to 105% for LA. The present method is simple, rapid, and accurate. It is suitable to use in the research of the preparation of HMF and LA in biorefinery area.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Espectroscopia Fotoeletrônica / Furaldeído / Ácidos Levulínicos Idioma: En Revista: ScientificWorldJournal Assunto da revista: MEDICINA Ano de publicação: 2013 Tipo de documento: Article País de afiliação: China

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Espectroscopia Fotoeletrônica / Furaldeído / Ácidos Levulínicos Idioma: En Revista: ScientificWorldJournal Assunto da revista: MEDICINA Ano de publicação: 2013 Tipo de documento: Article País de afiliação: China