Comparison of Various Methods for Determination of Water in White Yoghurts

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F09%3A00008396" target="_blank" >RIV/00216275:25310/09:00008396 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Comparison of Various Methods for Determination of Water in White Yoghurts

Original language description

Water content was determined in 11 samples of white yoghurts. Several techniques, namely Karl Fischer (KF) volumetric titration, near and middle infrared spectroscopy (MIR), oven drying and moisture analyser were used. Optimisations of solvent, titrationtemperature and extraction time were carried out for the KF titration. Methanol at room temperature with 5 min extraction period was used as final conditions. For the infrared spectroscopy (FTIR) the suitable solvent and the appropriate wavenumbers forwater analysis were chosen. The measurement in the near infrared (NIR) region at the wavenumber 10270 cm-1 using acetonitrile as solvent and transmission method was evaluated as the best of the FTIR methods. Based on the comparison of individual methodsthe oven drying at 105 degrees C seems to be the most suitable, but it is the most time consuming. However, KF volumetric titration and especially FTIR methods appear to be good alternatives to the drying methods.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CB - Analytical chemistry, separation

OECD FORD branch

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Project

<a href="/en/project/GA203%2F08%2F1536" target="_blank" >GA203/08/1536: Progressive methods in chemical, food and clinical analysis</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2009

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Food Chemistry

ISSN

0308-8146

e-ISSN

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Volume of the periodical

115

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

5

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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