Determination of Polycyclic Aromatic Hydrocarbons in Soils and Bottom Sediments by Gas Chromatography–Mass Spectrometry with QuEChERS Sample Preparation

Journal of Analytical Chemistry - The work is dedicated to the determination of polyaromatic hydrocarbons (PAHs) in soils and bottom sediments by gas chromatography–mass spectrometry using...     

Chromatography–mass spectrometry identification of polyaromatic hydrocarbons in thermally modified petroleum products and thermal destruction products of organic materials of various origins

Polyaromatic hydrocarbons in samples of thermally treated petroleum products and thermal destruction products of organic materials of various origins are studied. Samples of kerosene, diesel fuel, and gasoline of different grades, that is, light flammable petroleum products often used as combustion initiators; wood; flooring (linoleum); and offset paper are selected as test samples. A pattern for determining these samples by chromatography–mass spectrometry against the background of other products formed under fire conditions is developed. It is suggested to use the limiting value of the intensity ratios of the peaks of tri- and bicyclic condensed arenes in trace residues of the combustion initiator, modified as a result of evaporation and burnup, as an identification parameter. This approach expands the range of tasks in identifying the source of environmental pollution and in determining traces of combustion initiator for forensic and fire-technical expertise.     

Antifouling Properties of Biocide-Containing Systems Incorporated into Thermally Expanded Graphite

Russian Journal of Applied Chemistry - A study was preformed of complex systems containing a biocide (isothiozolone-3) introduced into a carrier, thermally expanded graphite. It is shown that when...     

Some properties of 2-alkoxy-1-alken-3-ols

Conclusions The reaction of 2-alkoxyacroleins with Grignard reagent gave some new 2-alkoxy-1-alken-3-ols, which in the presence of p-toluenesulfonic acid are cyclodimerized to 2,3,5,6-tetraalkyl-2,5-dialkoxy-1,4-dioxanes, which tend to cleave ethanol to give 2,3,5,6-tetraalkyl-5-alkoxy-1,4-dioxenes.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2534–2538, November, 1980.The authors express their gratitude to V. I. Lavrent'ev and V. Yu. Vitkovskii for taking the mass spectra.     

Synthesis of acetoxyacetaldehyde

Conclusions A method was developed for the preparation of acetoxyacetaldehyde (60% yield) by the hydrolysis of 1-ethoxy-1, 2-diacetoxyethane. Acetoxyacetaldehyde oligomerizes even at room temperature.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1630–1631, July, 1976.