Гомологические Инкременты Газохроматографических Индексов Удерживания Как Характеристика Полярности Органических Соединений

Зенкевич, И.Г.; университет, Санкт-Петербургский государственный

doi:10.1134/s0044460x19030016

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“…Это сле дует из меньшей величины <i RI > = -37 ± 25 (ср. с <i RI > = -166 ± 22), так как такие го мологи чес кие инкременты индексов удерживания рекомендованы в качестве кри терия по ляр нос ти органических соединений [49].…”

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Chromato-mass spectrometric characterization of diethyl ketals of aliphatic carbonyl compounds

Зенкевич¹,

Lukina²

2019

АиК

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Section: Tableunclassified

Chromato-mass spectrometric characterization of diethyl ketals of aliphatic carbonyl compounds

Зенкевич¹,

Lukina²

2019

АиК

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Features of the Dependence of the Retention Indices of Sorbates in Reversed-Phase High-Performance Liquid Chromatography on the Content of Organic Solvents in the Eluent

Zenkevich,

Deruish,

Nikitina

2023

Russian Journal of Physical Chemistry

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Characterizing the dependence of the retention indices (RIs) of sorbates of different chemical origins on the content (С) of organic solvents (methanol, acetonitrile) in eluents used in reversed-phase HPLC shows that the coefficients dRI/dC of the same compounds for eluents of different compositions differ considerably. The range of variations in coefficients dRI/dC for water–methanol eluents (–5.6 to +4.6) is approximately twice that of water–acetonitrile eluents (−4.5 to +0.8). It is also found that for nonpolar compounds when using water–acetonitrile eluents, the dRI/dC values are typically lower than those for water–methanol eluents. The opposite is observed for polar compounds. The signs and absolute values of coefficients dRI/dC are largely determined by the polarity of the sorbates. dRI/dC 0 for nonpolar sorbates, and dRI/dC 0 for sorbates of higher polarity. Determination even of the sign of this coefficient therefore provides important information about the chemical nature of sorbates. It is shown that coefficients dRI/dC do not correlate with either the RI values or hydrophobicity logPlog⁡. However, they do correlate with homologous increments of hydrophobicity ilogP and the homologous increments of RI iRI for eluents of any composition. Quantities ilogP and iRI characterize the polarity of homologous series of sorbates, rather than the polarity of the particular sorbates.

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Гомологические Инкременты Газохроматографических Индексов Удерживания Как Характеристика Полярности Органических Соединений

Cited by 2 publications

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Chromato-mass spectrometric characterization of diethyl ketals of aliphatic carbonyl compounds

Chromato-mass spectrometric characterization of diethyl ketals of aliphatic carbonyl compounds

Features of the Dependence of the Retention Indices of Sorbates in Reversed-Phase High-Performance Liquid Chromatography on the Content of Organic Solvents in the Eluent

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