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本文研究了不同反应条件下热水预抽提过程中糠醛(F)和羟甲基糠醛(HMF)的生成规律。结果表明:H因子(分别为Hp和Hh因子)及氢离子浓度能很好地描述抽提液中F和HMF生成量的变化规律。据此,分别建立了竹子热水预抽提液中F和HMF浓度的预测模型,即CF0.5=0.0005713×HP、C0F.6=9453.8×[H+]和C0H.M4F=0.000189×Hh+0.0545、C0H.M6F=2394.6×[H+]+0.0112。为了控制F和HMF的生成量,预抽提的Hp因子和Hh因子应分别控制在2000和2400以下,抽提液的氢离子浓度不应高于0.0013mol/L。这将为竹子热水预抽提过程中F和HMF生成的控制提供理论依据和技术支持。
In this paper, the formation of furfural (F) and hydroxymethylfurfural (HMF) during hot water pre-extraction under different reaction conditions were studied. The results showed that the factor H (Hp and Hh, respectively) and hydrogen ion concentration could well describe the variation of F and HMF production in the extract. Therefore, the prediction models of F and HMF concentration in bamboo hot water pre-extraction liquid were established respectively, that is, CF0.5 = 0.0005713 × HP, C0F.6 = 9453.8 × [H +] and C0H.M4F = 0.000189 × Hh + 0.0545 , C0H.M6F = 2394.6 × [H +] + 0.0112. In order to control the production of F and HMF, the pre-extracted Hp factor and Hh factor should be controlled below 2000 and 2400 respectively, and the hydrogen ion concentration of the extract should not exceed 0.0013 mol / L. This will provide a theoretical basis and technical support for the control of F and HMF generation in the process of bamboo hot water pre-extraction.