Back to Search
Start Over
Beer quality screening by FT-IR spectrometry: Impact of measurement strategies, data pre-processings and variable selection algorithms
- Source :
-
Journal of Food Engineering . Oct2011, Vol. 106 Issue 3, p188-198. 11p. - Publication Year :
- 2011
-
Abstract
- Abstract: In the presented research three measurement strategies of Fourier transform infrared (FT-IR) spectrometry (horizontal- and micro-attenuated total reflection (HATR and μATR, respectively) and a novel high throughput transmission (HTT)) in combination with extensive chemometric approach have been applied for analysis of beer. Fifty Belgian beer samples were analyzed: lager and white beers, dark and blonde ales, lambic and Trappist beers. Partial least square (PLS) regression was used for prediction of different physicochemical parameters of beer based on mid-IR data, modified with different spectral preprocessing and variable selection algorithms for higher prediction performance. It was found that HATR and μATR have the same prediction capability with a slight advantage of μATR and excellent correlations between spectra and reference values were demonstrated for original (R 2 0.95), apparent (R 2 0.89) and real (R 2 0.95) extracts, real and apparent degrees of fermentation (R 2 0.91 and 0.89), alcohol content (R 2 0.94) and energetic value (R 2 0.95). Good results (R 2 0.83) were obtained from the HTT experiments for prediction of real extract and allow measurement of large sample numbers in short time (1 sample/minute) with further potential increase in a sample throughput and has the possibility for automation. The obtained results indicate that mid-IR spectrometry in combination with advanced pre-processing and variable selection methods is a valuable analytical tool for high throughput measurement of beer quality attributes and thus has potential for use in product development and quality control. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 02608774
- Volume :
- 106
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Journal of Food Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 61484765
- Full Text :
- https://doi.org/10.1016/j.jfoodeng.2011.05.003