ORBi: Colinet Frédéric - Potential estimation of titratable acidity in cow milk using mid-infrared spectrometry

Reference : Potential estimation of titratable acidity in cow milk using mid-infrared spectrometry


	Document type :	Scientific congresses and symposiums : Paper published in a journal
	Discipline(s) :	Life sciences : Genetics & genetic processes Life sciences : Food science Life sciences : Animal production & animal husbandry
	To cite this reference:	http://hdl.handle.net/2268/63315

Title :	Potential estimation of titratable acidity in cow milk using mid-infrared spectrometry
Language :	English
Author, co-author :	Colinet, Frédéric [Université de Liège - ULg > Sciences agronomiques > Zootechnie >]
	Soyeurt, Hélène [Université de Liège - ULg > Sciences agronomiques > Zootechnie >]
	Anceau, Christine [Université de Liège - ULg > Chimie et bio-industries > Technologie des industries agro-alimentaires >]
	Vanlierde, Amélie [Université de Liège - ULg > Sciences agronomiques > Zootechnie > 2e an. master bioingé. : sc. agrono., fin. spéc. >]
	Keyen, Nicolas [Université de Liège - ULg > Chimie et bio-industries > Technologie des industries agro-alimentaires > >]
	Dardenne, Pierre [Centre Wallon de Recherches agronomiques > Qualité des productions agricoles > > >]
	Gengler, Nicolas [Université de Liège - ULg > Sciences agronomiques > Zootechnie >]
	Sindic, Marianne [Université de Liège - ULg > Chimie et bio-industries > Technologie des industries agro-alimentaires >]
Publication date :	2010
Journal title :	ICAR Technical Series
Publisher :	ICAR
Volume :	14
Special issue title :	Proceedings of ICAR 37th session
Pages :	239-243
On invitation :	No
Audience :	International
ISSN :	1563-2504
City :	Rome
Country :	Italy
Event name :	ICAR 37th Annual Meeting
Event date :	du 31 mai 2010 au 4 juin 2010
Event organizer :	ICAR
Event place (city) :	Riga
Event country :	Lettonie
Keywords :	[en] milk ; titratable acidity ; mid-infrared spectrometry ; MIR ; Dornic degree
Abstract :	[en] Milk coagulation has a direct effect on cheese yield. Several factors influence the milk coagulation kinetics. In addition to calcium and milk protein concentrations, titratable acidity influences all the phases of milk coagulation. The objective of this research was to study the feasibility of prediction of titratable acidity directly in bovine milk using mid-infrared spectrometry. In order to maximize the variability in the measurements of titratable acidity, milk samples were collected on basis of several criteria (e.g. breeds). The titratable acidity was recorded as Dornic degree. All samples were also analyzed by MIR spectrometry. Using partial least squares regressions and first derivative pretreatment of spectral data, a calibration equation was built to predict the Dornic degree in cow milk. First results were promising and showed the potentiality to this calibration. The calibration and cross-validation coefficients of determination were 92.25 and 89.88 %, respectively. Moreover, the ratio of standard error of prediction to standard deviation was 3.13 and permits us to consider the calibration equation as usable in most application such as scientific researches and the screening of the Walloon dairy herd particularly in order to improve the milk coagulation properties.
Research units :	EPAN - GAA
Funders :	Fonds Européen de Développement Régional - FEDER ; Région wallonne : Direction générale opérationnelle de l'Agriculture, des Ressources Naturelles et de l'Environnement - DGARNE
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/63315
Other URL :	http://www.icar.org
	http://www.icar.org/Documents/technical_series/tec_series_14_Riga.pdf

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