Quantitative analysis of polycyclic aromatic hydrocarbons using high‐performance liquid chromatography‐photodiode array‐high‐resolution mass spectrometric detection platform coupled to electrospray and atmospheric pressure photoionization sources

Polycyclic aromatic hydrocarbons (PAHs) are common pollutants present in atmospheric aerosols and other environmental mixtures. They are of particular air quality and human health concerns as many of them are carcinogenic toxins. They also affect absorption of solar radiation by aerosols, therefore...

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Veröffentlicht in:	Journal of mass spectrometry. Jg. 57; H. 2; S. e4804 - n/a
Hauptverfasser:	Hettiyadura, Anusha Priyadarshani Silva, Laskin, Alexander
Format:	Journal Article
Sprache:	Englisch
Veröffentlicht:	England Wiley Subscription Services, Inc 01.02.2022
Schlagworte:	absorbance Absorption Absorption coefficient Absorptivity Acidification Aerosols Air quality analysis of complex mixtures Aromatic compounds Aromatic hydrocarbons Arrays Atmospheric aerosols Atmospheric pressure atmospheric pressure photoionization carcinogenicity Carcinogens Chemical composition chemical species Chromatography climate Collision dynamics Detection Detection limits Electromagnetic absorption electrospray ionization electrospray ionization mass spectrometry Electrospraying Environmental chemistry Experiments Formic acid Geochemistry high performance liquid chromatography human health Ionization Ions Light absorption Liquid chromatography Mass mass spectrometry Organic compounds Photochemical reactions photodiode array detector Photodiodes Photoionization Pollutants Polycyclic aromatic hydrocarbons Quantitation Quantitative analysis Radiative forcing Resolution Solar radiation Spectrometry Toxins Wavelength wavelengths photodiode array detector atmospheric pressure photoionization high performance liquid chromatography quantitation analysis of complex mixtures mass spectrometry electrospray ionization polycyclic aromatic hydrocarbons
ISSN:	1076-5174, 1096-9888, 1096-9888
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Beschreibung
Zusammenfassung:	Polycyclic aromatic hydrocarbons (PAHs) are common pollutants present in atmospheric aerosols and other environmental mixtures. They are of particular air quality and human health concerns as many of them are carcinogenic toxins. They also affect absorption of solar radiation by aerosols, therefore contributing to the radiative forcing of climate. For environmental chemistry studies, it is advantageous to quantify PAH components using the same analytical technics that are commonly applied to characterize a broad range of polar analytes present in the same environmental mixtures. Liquid chromatography coupled with photodiode array and high‐resolution mass spectrometric detection (LC‐PDA‐HRMS) is a method of choice for comprehensive characterization of chemical composition and quantification of light absorption properties of individual organic compounds present in the environmental samples. However, quantification of non‐polar PAHs by this method is poorly established because of their imperfect ionization in electrospray ionization (ESI) technique. This tutorial article provides a comprehensive evaluation of the quantitative analysis of 16 priority pollutant PAHs in a standard reference material using the LC–MS platform coupled with the ESI source. Results are further corroborated by the quantitation experiments using an atmospheric pressure photoionization (APPI) method, which is more sensitive for the PAH detection. The basic concepts and step‐by‐step practical guidance for the PAHs quantitative characterization are offered based on the systematic experiments, which include (1) Evaluation effects of different acidification levels by formic acid on the (+)ESI‐MS detection of PAHs. (2) Comparison of detection limits in ESI+ versus APPI+ experiments. (3) Investigation of the PAH fragmentation patterns in MS2 experiments at different collision energies. (4) Calculation of wavelength dependent mass absorption coefficient (MACλ) of the standard mixture and its individual PAHs using LC‐PDA data. (5) Assessment of the minimal injected mass required for accurate quantification of MACλ of the standard mixture and of a multi‐component environmental sample.
Bibliographie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23
ISSN:	1076-5174 1096-9888 1096-9888
DOI:	10.1002/jms.4804