Extraction, Separation, and Intramolecular Carbon Isotope Characterization of Athabasca Oil Sands Acids in Environmental Samples

被引：23

作者：

Ahad, Jason M. E. ^{[1
]}

Pakdel, Hooshang ^{[2
]}

Savard, Martine M. ^{[1
]}

Simard, Marie-Christine ^{[1
]}

Smirnoff, Anna ^{[1
]}

机构：

[1] Nat Resources Canada, Geol Survey Canada, Quebec City, PQ, Canada

[2] INRS Eau Terre Environm, Quebec City, PQ, Canada

来源：

ANALYTICAL CHEMISTRY | 2012年 / 84卷 / 23期

关键词：

NAPHTHENIC ACIDS; MASS-SPECTROMETRY; ORGANIC-ACIDS; HYDROUS PYROLYSIS; CARBOXYLIC-ACIDS; DEEP SUBSURFACE; WATER SAMPLES; CRUDE-OIL; BIODEGRADATION; PETROLEUM;

D O I：

10.1021/ac302680y

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Here we report a novel approach to extract, isolate, and characterize high molecular weight organic acids found in the Athabasca oil sands region using preparative capillary gas chromatography (PCGC) followed by thermal conversion/elemental analysis-isotope ratio mass spectrometry (TC/EA-IRMS). A number of different "naphthenic acids" surrogate standards were analyzed as were samples from the bitumen-rich unprocessed McMurray Formation, oil sands process water, groundwater from monitoring wells, and surface water from the Athabasca River. The intramolecular carbon isotope signature generated by online pyrolysis (delta C-13(pyr)) showed little variation (+/- 0.6 parts per thousand) within any given sample across a large range of mass fractions separated by PCGC. Oil sand, tailings ponds, and deep McMurray Formation groundwater were significantly heavier (up to similar to 9 parts per thousand) compared to surface water and shallow groundwater samples, demonstrating the potential use of this technique in source apportionment studies.

引用

页码：10419 / 10425

页数：7

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