Sample injection of aromatic compounds from concentrators into multicapillary column by the thermal desorption method

V. M. Gruznov; M. N. Baldin; A. O. Malysheva

doi:10.15826/analitika.2019.23.3.003

Sample injection of aromatic compounds from concentrators into multicapillary column by the thermal desorption method

Переведенное название: Ввод пробы ароматических соединений с концентраторов в поликапиллярную колонку методом термической десорбции

V. M. Gruznov, M. N. Baldin, A. O. Malysheva

Кафедра аналитической химии ФЕН

Результат исследования: Научные публикации в периодических изданиях › статья

Аннотация

Настоящее время возрос интерес к геохимическим методам поиска залежей углеводородов по выявлению на поверхности Земли ореолов углеводородов, мигрирующих из залежей, в частности ароматических углеводородов: бензола, толуола, ксилолов. Концентрации мигрирующих углеводородов на поверхности Земли, как правило низкие, и находятся на уровне пороговых значений для газоаналитических приборов. Поэтому для их регистрации применяют концентрирование, в частности пассивное. Для этого используют концентраторы, закладываемые на небольшие глубины на разведываемой площади. В технологии съёмки, разрабатываемой авторами, используются многоразовые концентраторы в виде полых трубок из нержавеющей стали с сорбентом на основе силоксана SE-30, нанесенного на внутреннюю поверхность. Концентраторы в аналитических контейнерах закладываются в грунт на 1-2 суток. Анализ проб с концентраторов осуществляется на портативном поликапиллярном газовом хроматографе в полевых условиях. Статья посвящена специальному устройству ввода пробы с пассивных концентраторов и экспериментальному определению оптимального режима термодесорбционного ввода пробы с концентраторов в поликапиллярную колонку. Приведена оригинальная схема ввода, в которой реализована газодинамическая изоляция камеры устройства ввода и поликапиллярной колонки во время нагрева концентратора и анализа пробы, определено оптимальное время нагревания концентраторов и время ввода пробы

Переведенное название	Ввод пробы ароматических соединений с концентраторов в поликапиллярную колонку методом термической десорбции
Язык оригинала	английский
Страницы (с-по)	370-376
Число страниц	7
Журнал	Analitika i Kontrol
Том	23
Номер выпуска	3
DOI	https://doi.org/10.15826/analitika.2019.23.3.003
Состояние	Опубликовано - 1 янв 2019

Ключевые слова

Column
Gas-dynamic isolation of the injection device
Passive concentrators
Thermal desorption sample injection

ГРНТИ

31.19 Аналитическая химия

Доступ к документу

10.15826/analitika.2019.23.3.003

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Цитировать

Gruznov, V. M., Baldin, M. N., & Malysheva, A. O. (2019). Sample injection of aromatic compounds from concentrators into multicapillary column by the thermal desorption method. Analitika i Kontrol, 23(3), 370-376. https://doi.org/10.15826/analitika.2019.23.3.003

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abstract = "At present, there is an increased interest in geochemical methods of searching for hydrocarbon deposits by detecting on the Earth's surface the scattering halos of hydrocarbons that migrated from those deposits, namely the aromatic hydrocarbons such as benzene, toluene, xylenes. The concentrations of the migrated hydrocarbons on the surface of the Earth are usually low and could only be detected at the threshold level of the gas analyzers. Therefore, for their registration, the concentration is applied, in particular, the passive preconcentration. For this purpose, the concentrators are used, which are laid at shallow depths in the explored area. The survey technology that is being developed by the authors uses the reusable concentrators in the form of stainless-steel tubes with SE-30 siloxane-based sorbent applied on their inner surface. The concentrators placed in the analytical containers are laid in the ground for 1-2 days. The analysis of the samples from the concentrators is carried out on a portable multicapillary gas chromatograph in the field conditions. The current article is devoted to the development of a special device for the sample injection from the passive concentrators and the experimental determination of the optimal mode of thermal desorption sample injection from the concentrators into the multicapillary column. The original injection scheme is given, where the gas-dynamic isolation of the injection device camera and the multicapillary column during the concentrator heating and sample analysis is implemented; the optimum concentrator heating time and the optimum sample injection time are determined.",

keywords = "Column, Gas-dynamic isolation of the injection device, Passive concentrators, Thermal desorption sample injection",

author = "Gruznov, {V. M.} and Baldin, {M. N.} and Malysheva, {A. O.}",

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Sample injection of aromatic compounds from concentrators into multicapillary column by the thermal desorption method. / Gruznov, V. M.; Baldin, M. N.; Malysheva, A. O.

В: Analitika i Kontrol, Том 23, № 3, 01.01.2019, стр. 370-376.

Результат исследования: Научные публикации в периодических изданиях › статья

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AB - At present, there is an increased interest in geochemical methods of searching for hydrocarbon deposits by detecting on the Earth's surface the scattering halos of hydrocarbons that migrated from those deposits, namely the aromatic hydrocarbons such as benzene, toluene, xylenes. The concentrations of the migrated hydrocarbons on the surface of the Earth are usually low and could only be detected at the threshold level of the gas analyzers. Therefore, for their registration, the concentration is applied, in particular, the passive preconcentration. For this purpose, the concentrators are used, which are laid at shallow depths in the explored area. The survey technology that is being developed by the authors uses the reusable concentrators in the form of stainless-steel tubes with SE-30 siloxane-based sorbent applied on their inner surface. The concentrators placed in the analytical containers are laid in the ground for 1-2 days. The analysis of the samples from the concentrators is carried out on a portable multicapillary gas chromatograph in the field conditions. The current article is devoted to the development of a special device for the sample injection from the passive concentrators and the experimental determination of the optimal mode of thermal desorption sample injection from the concentrators into the multicapillary column. The original injection scheme is given, where the gas-dynamic isolation of the injection device camera and the multicapillary column during the concentrator heating and sample analysis is implemented; the optimum concentrator heating time and the optimum sample injection time are determined.

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