2002
DOI: 10.1093/jaoac/85.1.182
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Determination of Dissolved Naphthenic Acids in Natural Waters by Using Negative-Ion Electrospray Mass Spectrometry

Abstract: Naphthenic acids (NAs) have been implicated as some of the most toxic substances in oil sands leachates and identified as priority substances impacting on aquatic environments. As a group of compounds, NAs are not well characterized and comprise a large group of saturated aliphatic and alicyclic carboxylic acids found in hydrocarbon deposits (petroleum, oil sands bitumen, and crude oils). Described is an analytical method using negative-ion electrospray ionization mass spectrometry (ES/MS) of extracts. Preconc… Show more

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Cited by 129 publications
(85 citation statements)
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“…OSPW samples, or OSPW extracts, were analyzed by ESI‐MS using loop injection and a Quattro Ultima mass spectrometer (Micromass, Manchester, UK) equipped with an ESI interface operating in the negative ion mode 15. The MS conditions were: source temperature 90°C, desolvation temperature 220°C, cone voltage 62 V, capillary voltage 2.63 kV, cone gas (nitrogen0 flow rate 158 L h −1 , desolvation gas (nitrogen) flow rate 489 L h −1 , and the multiplier set at 450 V. Full scan MS was employed in the m/z 50–550 range.…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…OSPW samples, or OSPW extracts, were analyzed by ESI‐MS using loop injection and a Quattro Ultima mass spectrometer (Micromass, Manchester, UK) equipped with an ESI interface operating in the negative ion mode 15. The MS conditions were: source temperature 90°C, desolvation temperature 220°C, cone voltage 62 V, capillary voltage 2.63 kV, cone gas (nitrogen0 flow rate 158 L h −1 , desolvation gas (nitrogen) flow rate 489 L h −1 , and the multiplier set at 450 V. Full scan MS was employed in the m/z 50–550 range.…”
Section: Methodsmentioning
confidence: 99%
“…A recent interlaboratory comparison demonstrated substantial misclassification of NA isomer class profiles using unit‐resolution GC/MS, compared with HPLC/HRMS, although it remained unclear to what extent the volatile silyl derivatives used for GC or the inherent mass resolution differences were responsible for the errors produced by GC/MS 11. Since many investigators currently utilize unit‐resolution ESI‐MS to characterize and semi‐quantify environmental NA mixtures,9, 10, 13–15 the objective of the current work was to compare the characterization and quantification of NA mixtures by interlaboratory analysis of common samples and standards using: (i) direct injection ESI‐MS and (ii) HPLC/ESI‐HRMS.…”
mentioning
confidence: 99%
“…extraction cartridges (Biotage) [12,17]. The resulting solidphase extraction extract for a given hydroponic medium sample was concentrated to a final extract volume of 1 ml in 50:50 acetonitrile:water and 0.1% NH 4 OH.…”
Section: Na Analysismentioning
confidence: 99%
“…When coupled with negative electrospray ionization (ESI), FTMS facilitates the accurate mass determination of [M-H] À ions. [4][5][6] Further, by varying the ionization technique employed in conjunction with FTMS, Barrow et al were able to more broadly characterize NA samples that also contain compounds with poor ESI efficiencies. [7] In addition to atmospheric pressure ionization (API) sources, a recent study showcased the characterization of NAs by derivatization followed by gas chromatography (GC), coupled to ultra-high-resolution MS. [8] Electron ionization, CH 4 chemical ionization, and NH 3 chemical ionization were evaluated, correlating compound elemental composition with respect to retention time.…”
Section: Introductionmentioning
confidence: 99%