Determination of Glucose and Cellobiose Dissolved in the Ionic Liquid 1-Ethyl-3-Methylimidazolium Acetate Using Fourier Transform Infrared Spectroscopy

2009 ◽  
Vol 63 (9) ◽  
pp. 1041-1049 ◽  
Author(s):  
Johannes Kiefer ◽  
Katharina Obert ◽  
Jürgen Fries ◽  
Andreas Bösmann ◽  
Peter Wasserscheid ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Fourier Transform ◽  
Fourier Transform Infrared ◽  
Measured Quantity ◽  
Carbohydrate Concentration ◽  
Quantitative Measurements ◽  
Accuracy And Precision ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

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 wavenumbers have been identified, allowing quantitative measurements with high accuracy and precision.

scholarly journals Determination of Glucose in Dried Serum Samples by Fourier-Transform Infrared Spectroscopy

1999 ◽  
Vol 45 (9) ◽  
pp. 1530-1535 ◽  
Author(s):  
Cyril Petibois ◽  
Vincent Rigalleau ◽  
Anne-Marie Melin ◽  
Annie Perromat ◽  
Georges Cazorla ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Ir Spectroscopy ◽  
Glucose Oxidase ◽  
Glucose Concentration ◽  
Internal Standard ◽  
Fourier Transform Infrared ◽  
Serum Samples ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Abstract Background: Practical improvements are needed to allow measurement of glucose concentrations by Fourier- transform infrared (FT-IR) spectroscopy. We developed a new method that allows determination of the glucose concentration in dried sera. Methods: We studied 32 serum samples after fourfold dilution and desiccation before FT-IR analyses on a spectrometer operated at a resolution of 2.0 cm−1. We integrated all spectral windows at the surface of the spectrum in the C—O region. For comparison, glucose was measured in the sera by a glucose oxidase method. Results: One peak within the spectrum was most specific for glucose (997–1062 cm−1). Its surface integration showed a strong relationship with reference data (r = 0.998; P <0.001). FT-IR analyses of five glucose solutions were performed to determine its specific absorption at the same peak. In this way, glucose concentrations in serum spectra could be measured. For the first time while using FT-IR spectroscopy, no manipulation of spectra nor use of internal standard was necessary to obtain results in high accordance with glucose concentration measured by a conventional (glucose-oxidase) method (Sy|x = 0.25 mmol/L; r = 0.998). Conclusions: FT-IR spectroscopy appears to be an easy and accurate method to determine glucose concentration and could be widely used to simultaneously identify and quantify several metabolites in biological fluids or tissues.

Quick determination of melamine in infant powder and liquid milk by Fourier transform infrared spectroscopy

2014 ◽  
Vol 6 (14) ◽  
pp. 5269-5273 ◽  
Author(s):  
Sana Jawaid ◽  
Farah N. Talpur ◽  
Hassan Imran Afridi ◽  
Shafi M. Nizamani ◽  
Abid A. Khaskheli ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Ir Spectroscopy ◽  
Cost Effective ◽  
Fourier Transform Infrared ◽  
Ft Ir ◽  
Liquid Milk ◽  
Quick Determination ◽  
Ft Ir Spectroscopy

A simple, cost-effective and environmentally friendly analytical method was developed for the quantification of melamine (MEL) in liquid milk and infant powder by using transmission Fourier transform infrared (FT-IR) spectroscopy.

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