Extracting Vapor Pressure Data from Gas-Liquid Chromatography Retention Times. Part 2: Analysis of Double Reference Approach

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388963%3A_____%2F18%3A00500148" target="_blank" >RIV/61388963:_____/18:00500148 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1021/acs.jced.8b00699" target="_blank" >http://dx.doi.org/10.1021/acs.jced.8b00699</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jced.8b00699" target="_blank" >10.1021/acs.jced.8b00699</a>

Result language

angličtina

Original language name

Extracting Vapor Pressure Data from Gas-Liquid Chromatography Retention Times. Part 2: Analysis of Double Reference Approach

Original language description

The vapor pressures of 46 compounds including n-alkanes and their monofunctionalized derivatives, some monoterpenes, as well as chloro- and alkylbenzenes were determined by GLC exploring the Kovats retention indices (KI) technique, primarily in its basic form using two alkane references (GLC-RTKI).The fundamental advantage of the GLC-RTKI method is that it guarantees appropriate selection of alkane reference compounds. Typical relative errors in vapor pressures accompanying this method were below 30% for compounds of low polarity, while for polar compounds (nitriles, alcohols) the errors can reach percentages in the hundreds. In contrast, vapor pressures obtained from the modified Kovats method, relying on reference standards whose functional group matches that of the test compound (GLC-RTmKI), were found mostly within 5% of directly measured values. However, the success of this method is dependent on the availability of reliable vapor pressure data for compounds to serve as reference standards. As our methodology eliminates possible secondary error sources (e.g., data extrapolation, or recalculation from supercooled liquid-to-solid phase or vice versa), we propose that the results obtained are as accurate as is feasibly possible with GLC-RTKI and GLC-RTmKI methods. This study also yielded a novel set of directly measured (static method) data on the vapor pressures of C7-C9 alkyl nitriles.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10403 - Physical chemistry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

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

Name of the periodical

Journal of Chemical and Engineering Data

ISSN

0021-9568

e-ISSN

—

Volume of the periodical

63

Issue of the periodical within the volume

12

Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

4649-4661

UT code for WoS article

000453488000036

EID of the result in the Scopus database

2-s2.0-85056866418