Interlaboratory study of ethanol usage as an internal standard in direct determination of volatile compounds in alcoholic products
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F19%3A10409578" target="_blank" >RIV/00216208:11310/19:10409578 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1051/bioconf/20191502030" target="_blank" >https://doi.org/10.1051/bioconf/20191502030</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/bioconf/20191502030" target="_blank" >10.1051/bioconf/20191502030</a>
Alternative languages
Result language
angličtina
Original language name
Interlaboratory study of ethanol usage as an internal standard in direct determination of volatile compounds in alcoholic products
Original language description
A collaborative interlaboratory study on the method of direct quantitation of volatile compounds in spirit drinks and alcoholic products was conducted. The discussed method applies ethanol, the major volatile component of an alcoholic product, as an internal standard. In this study 9 laboratories from 4 different countries were supplied with standard solutions for gas chromatographic measurements. Five aqueous ethanol 40% (v/v) standard solutions containing target compounds in concentrations ranging from 10 mg/L to 400 mg/L of absolute alcohol were prepared and sent to the participants for quantification of acetaldehyde, methyl acetate, ethyl acetate, methanol, 2-propanol, 1-propanol, 2-methyl-1-propanol, 1-butanol and 3-methyl-1-butanol. The interlaboratory study was evaluated according to the ISO 5725 standards and the Eurachem guide. The within-laboratory precision varied between 0.4% and 7.5% for all samples and compounds, showing a sufficiently high repeatability of the method. The between-laboratory precision was found to vary within a satisfactory range of 0.5% o 10.0%. Precision of the method was well within the range predicted by the Horwitz equation for all analytes. The analysis of trueness showed that the bias of the method is insignificant at the significance level alpha = 5%. The determined concentrations of the analytes compared well to the gravimetrical values thus showing very satisfactory accuracy of the method. The results of the interlaboratory study confirmed that "Ethanol as Internal Standard" method is robust and reliable and can be used as a standard reference method for analysing volatile compounds in water-ethanol samples. The possibilities of method validation according to the previously obtained experimental data were shown.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10406 - Analytical chemistry
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
42nd World Congress of Vine and Wine
ISBN
978-2-85038-010-5
ISSN
2117-4458
e-ISSN
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Number of pages
8
Pages from-to
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Publisher name
E D P Sciences
Place of publication
CEDEX A
Event location
Geneva
Event date
Jul 15, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000509352700066