Rapid gas-chromatographic determination of marking agents added to the industrial plastic explosives in air

Gruznov, V. M.; Балдин, М. Н.; Efimenko, A. P.; Maksimov, E. M.; Naumenko, I. I.; Pronin, V. G.

doi:10.1134/s1061934814120053

Cited by 9 publications

(7 citation statements)

References 3 publications

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“…Концентраторы изготовлены в виде трубок из нержавеющей стали длинной 30 мм, внешним диаметром 6.5 мм с толщиной стенок 0.3 мм (объем концентраторов 0.8 см 3 ), на внутреннюю поверхность трубок нанесен толстый слой (до 100 мкм) хроматографической фазы -полидиметилсилоксана SE-30 [5]. Фаза SE-30 нанесена золь-гель технологией, обеспечивающей её иммобилизацию [7].…”

Section: экспериментальная частьunclassified

“…Портативный поликапиллярный газовый хроматограф (ГХ) ЭХО-В-ФИД [6] Достижение максимальной амплитуды хроматографического пика анализируемого вещества с концентратора выражали через достижение максимального коэффициента концентрирования (КК) К h , определяемого отношением высоты А К хроматографического пика анализируемого вещества в пробе с концентратора, пришедшего в равновесие со средой, к высоте А Г хроматографического пика анализируемого вещества в среде насыщения [5]:…”

Section: экспериментальная частьunclassified

“…В технологии геохимической съёмки по ароматическим углеводородам, разрабатываемой авторами [1], используются пассивные концентраторы в виде трубок из нержавеющей стали с сорбентом из силоксана SE-30, нанесенного на внутреннюю поверхность. Авторами показана перспективность геохимической съёмки с такими концентраторами для оконтуривания потенциальных залежей углеводородов [2][3][4][5].…”

Section: Introductionunclassified

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

Gruznov¹,

Балдин²,

Malysheva³

2019

АиК

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В 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 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 концентратора и время ввода пробы. Ключевые слова: пассивные концентраторы, ввод методом термической десорбции, газодинамическая изоляция устройства ввода и колонки.

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Section: экспериментальная частьunclassified

Section: Introductionunclassified

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

Gruznov¹,

Балдин²,

Malysheva³

2019

АиК

Self Cite

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“…A different preconcentration technique was used by Gruznov et al, consisting of a woven metal wire grid, also in combination with a chromatography column . It was found that a relative humidity of 26% decreased the amplitude of the GC peak for DMNB by 7 times, and thereafter dry air was used for their measurements.…”

Section: Introductionmentioning

confidence: 99%

Nanoporous Silica Preconcentrator for Vapor-Phase DMNB, a Detection Taggant for Explosives

2020

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The detection of trace amounts of explosives in the vapor phase is of great importance. Preconcentration of the analyte is a useful technique to lower the detection limit of existing sensors. A nanoporous silica (pSiO 2 ) substrate was evaluated as a preconcentrator for gas-phase 2,3-dimethyl-2,3-dinitrobutane (DMNB), a volatile detection taggant added by law to plastic explosives. After collection in pSiO 2 , the DMNB vapor was thermally desorbed at 70 °C into a gas chromatography–mass spectrometry sorbent tube. This was analyzed for the total mass of DMNB collected in pSiO 2 . The loading time and loading temperature of pSiO 2 were varied systematically between 15 and 60 min and 5–20 °C, respectively. The preconcentrator’s performance was compared to that of a nonporous substrate of the same material as a control. The collection efficiency of pSiO 2 was calculated as approximately 20% of the total DMNB that passed over it in 30 min, at a concentration of 0.5 ppm in N 2 carrier gas. It had enhancement factors compared to the nonporous substrate of 12 and 16 for 0.5 and 4.1 ppm DMNB, respectively, under the same conditions. No advantage was found with cooling pSiO 2 below room temperature during the loading phase, which removes any need for a cooling system to aid preconcentration. The low desorption temperature of 70 °C is an advantage over other preconcentration systems, although a higher temperature could decrease the desorption time.

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“…Active samplers have often used Tenax TA (polydiphenylphenylene oxide, PPPO) and Tenax GR (polydiphenylphenylene oxide with graphite, PPPO-GR) as a vapour pre-concentrator for explosives such as TNT and DMNB in occupational health exposure studies 15 – 18 . Thin layers of PPPO have recently been investigated as planar-type pre-concentrators for a small number of marking agents used in plastic explosives such as 4-NT and DMNB (also via active sampling in combination with subsequent GC-MS analysis) 19 . More recently, PPPO has been coated on micro pre-concentrators as an adsorbent solution for the selective pre-concentration of 2,4-DNT with sensitivity measured at mid ppb level 20 .…”

Section: Introductionmentioning

confidence: 99%

Sorbent Film-Coated Passive Samplers for Explosives Vapour Detection Part A: Materials Optimisation and Integration with Analytical Technologies

McEneff

Murphy

Webb

et al. 2018

Sci Rep

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A new thin-film passive sampler is presented as a low resource dependent and discrete continuous monitoring solution for explosives-related vapours. Using 15 mid-high vapour pressure explosives-related compounds as probes, combinations of four thermally stable substrates and six film-based sorbents were evaluated. Meta-aramid and phenylene oxide-based materials showed the best recoveries from small voids (~70%). Analysis was performed using liquid chromatography-high resolution accurate mass spectrometry which also enabled tentative identification of new targets from the acquired data. Preliminary uptake kinetics experiments revealed plateau concentrations on the device were reached between 3–5 days. Compounds used in improvised explosive devices, such as triacetone triperoxide, were detected within 1 hour and were stably retained by the sampler for up to 7 days. Sampler performance was consistent for 22 months after manufacture. Lastly, its direct integration with currently in-service explosives screening equipment including ion mobility spectrometry and thermal desorption mass spectrometry is presented. Following exposure to several open environments and targeted interferences, sampler performance was subsequently assessed and potential interferences identified. High-security building and area monitoring for concealed explosives using such cost-effective and discrete passive samplers can add extra assurance to search routines while minimising any additional burden on personnel or everyday site operation.

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Rapid gas-chromatographic determination of marking agents added to the industrial plastic explosives in air

Cited by 9 publications

References 3 publications

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

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

Nanoporous Silica Preconcentrator for Vapor-Phase DMNB, a Detection Taggant for Explosives

Sorbent Film-Coated Passive Samplers for Explosives Vapour Detection Part A: Materials Optimisation and Integration with Analytical Technologies

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