ArticleAnalytical and bioanalytical chemistry2020
Uncover aldehydes in biomass hydrolyzates: disproportionation of aldehydes in alkaline solution and subsequent measurement using an automated HPAEC-PAD method.
Article in Analytical and bioanalytical chemistry, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
High-performance anion exchange chromatography coupled to pulsed amperometric detection (HPAEC-PAD) was used for developing a method for identifying and quantifying aldehydes in biomass hydrolyzates. This method was optimized to the requirements of HPAEC-PAD in order to allow for a simultaneous determination of aldehydes by respective Cannizzaro alcohols. To this end, sodium hydroxide concentration (0.1 to 5.0 mol/L), temperature (30 to 40 °C), and reaction time (0 to 24 h) were investigated for sufficient and reproducible disproportionation of the biomass-derived aldehydes. The optimized method for aldehyde disproportionation and subsequent measurement are 1 mol/L sodium hydroxide, 40 °C, and 1 h reaction time. The detection limits resulting from this method are lower than 68.55 mg/L and the sensitivity above 0.024 (nC min)/(mg/L) for 3,4-dimethoxybenzaldehyde. Linearity for aldehyde calibration always exceeded 0.98. Thus, HPAEC-PAD analysis allows for the quantification of biomass-derived compounds from all natural polymers and, therefore, it has exemplarily been used to quantify aldehyde concentration of beech wood, orange peel, and algae biomass hydrolyzates. Graphical abstract.
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