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首页> 外文期刊>Applied Spectroscopy >Determination of Glucose and Cellobiose Dissolved in the Ionic Liquid 1-Ethyl-3-Methylimidazolium Acetate Using Fourier Transform Infrared Spectroscopy
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Determination of Glucose and Cellobiose Dissolved in the Ionic Liquid 1-Ethyl-3-Methylimidazolium Acetate Using Fourier Transform Infrared Spectroscopy

机译：傅立叶变换红外光谱法测定离子液体1-乙基-3-甲基咪唑鎓乙酸盐中溶解的葡萄糖和纤维二糖

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The conversion of biogenic carbohydrate feedstock to chemicals or energy equivalents is a promising approach to solve the problem of limited fossil fuel reserves. Some concepts to accomplish these transformations are based on ionic liquids (ILs) due to their ability to dissolve biopolymers, such as cellulose, and even complex biopolymer mixtures, such as wood. However, concerning control of such conversions, a reliable tool for process analytics is required. In this paper we demonstrate the applicability of Fourier transform infrared (FT-IR) spectroscopy to perform quantitative concentration measurements of glucose and cellobiose as two examples of carbohydrates dissolved in the room-temperature ionic liquid [EMIM][OAc] (1-ethyl-3-methylimidazolium acetate). For this purpose, binary mixtures in the range 0–20 wt% have been studied. A previously developed method for the data analysis, which was based on the Beer–Lambert relation, has been universalized by employing empirical correlations between the measured quantity (i.e., extinction) and the carbohydrate concentration. In the entire spectral range under investigation (500–4000 cm−1) numerous individual wave-numbers have been identified, allowing quantitative measurements with high accuracy and precision.
机译：将生物碳水化合物原料转化为化学物质或能源等价物是解决化石燃料储量有限的问题的一种有前途的方法。由于离子液体具有溶解生物聚合物（例如纤维素）甚至复杂的生物聚合物混合物（例如木材）的能力，因此，完成这些转换的某些概念基于离子液体（IL）。但是，关于控制此类转换，需要一种可靠的过程分析工具。在本文中，我们证明了傅里叶变换红外（FT-IR）光谱法可用于对葡萄糖和纤维二糖进行定量浓度测量，这是溶解在室温离子液体[EMIM] [OAc]（1-乙基- 3-甲基咪唑乙酸盐）。为此，已经研究了0至20 wt％范围内的二元混合物。以前开发的基于比尔-兰伯特关系的数据分析方法，已经通过利用测量量（即消光）和碳水化合物浓度之间的经验相关性得到了普遍应用。在所研究的整个光谱范围（500–4000 cm −1 ）中，已经识别出许多单独的波数，从而可以进行高精度和高精度的定量测量。

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    《Applied Spectroscopy》 |2009年第9期|1041-1049|共9页
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