Evaluating Atmospheric pressure Solids Analysis Probe (ASAP) mass spectrometry for the analysis of low molecular weight synthetic polymers

Smith, Michael J. P.; Cameron, Neil R.; Mosely, Jackie A.

doi:10.1039/c2an35556f

Cited by 60 publications

(69 citation statements)

References 55 publications

(82 reference statements)

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“…Evaporation is followed by proton transfer ionisation in the presence of H 3 O + to produce [M + H] + ions [84]. Interestingly, non-polar molecules are ionised in ASAP as molecular radical cations, which may be advantageous for structural characterisation of complex analytes [85]. An important advantage of ASAP-MS is that poorly soluble compounds can be probed without using solvents.…”

Section: Ambient Surface Ionisation Techniquesmentioning

confidence: 99%

New mass spectrometry techniques for studying physical chemistry of atmospheric heterogeneous processes

Laskin

Nizkorodov

2013

International Reviews in Physical Chemistry

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Ambient particles and droplets have a significant effect on climate, visibility and human health. Once formed, they undergo continuous transformations through condensation and evaporation of water, uptake of low-volatility organic molecules and photochemical reactions involving various gaseous and condensed-phase species in the atmosphere. These transformations determine the physical and chemical properties of airborne particles, such as their ability to absorb and scatter solar radiation and nucleate cloud droplets. The complexity, heterogeneity and size of ambient particles make it challenging to understand the kinetics and mechanisms of their formation and chemical transformations. Mass spectrometry (MS) is a powerful analytical technique that enables detailed chemical characterisation of both small and large molecules in complex matrices. This capability makes MS a promising tool for studying chemical transformations of particles and droplets in the atmosphere. This review is focused on new and emerging experimental MS-based approaches for understanding the kinetics and mechanisms of such transformations. Some of the techniques discussed herein are best suited for ambient samples, while the others work best in laboratory applications. However, in combination, they provide a comprehensive arsenal of methods for characterisation of particles and droplets. In addition, we emphasise the role of fundamental physical chemistry studies in the development of new methods for chemical analysis of ambient particles and droplets.

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Section: Ambient Surface Ionisation Techniquesmentioning

confidence: 99%

New mass spectrometry techniques for studying physical chemistry of atmospheric heterogeneous processes

Laskin

Nizkorodov

2013

International Reviews in Physical Chemistry

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“…ASAP (Fig. 60 The desorption temperature, ranging from 50 to 650°C, plays an 3 Conversions of 1-iodoperfluorohexane and oligo(HFPO)-CF-(CF 3 )CF 2 I and the formation of the undesired hydrogen end-capped (HEC) compound for the radical addition of 1-iodoperfluoro(alkoxy)alkanes onto allyl alcohol and allyl-O-PEG-OCH 3 . S32 †) spectra were critical for determining the coupling of the two oligomers.…”

Section: 2mentioning

confidence: 99%

A new oligo(hexafluoropropylene oxide)-b-oligo(ethylene oxide) diblock surfactant obtained by radical reactions

et al. 2015

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The synthesis and characterization of a new oligo(hexafluoropropylene oxide)-b-oligo(ethylene oxide), oligo(HFPO)-b-oligo(PEG), diblock co-oligomer are presented. First, the model reactions dealing with the radical addition of 1-iodoperfluorohexane (C 6 F 13 I) onto allyl alcohol and allyl-O-PEG-OCH 3 were optimized in terms of the choice of the initiator (azobisisobutyronitrile [AIBN], tert-butylperoxypivalate [TBBPi], and benzoyl peroxide [BPO]) and of the solvent, temperature, and time. Allyl-O-PEG-OCH 3 was obtained from the etherification of ω-hydroxy-PEG with allyl bromide. End-capping of oligo(HFPO) with PEG was successfully achieved by the radical addition of 1-iodoperfluoropropyl-2-oligo(hexafluoropropylene oxide) [oligo(HFPO)-CF(CF 3 )CF 2 I] onto allyl-O-PEG-OCH 3 using the best conditions of the model reactions. Although TBPPi failed and led to oligo(HFPO)-isobutyl iodide, AIBN and BPO yielded oligo (HFPO)-CH 2 CHICH 2 -oligo(PEG). The selective reduction of the latter compound led to oligo(HFPO)-boligo(PEG) in 77% yield, the surface tension properties of which were compared to those of commercially available ammonium perfluorooctanoate (APFO) and perfluorooctanoic acid (PFOA). Its critical micelle concentration was 0.04 g mol −1 . All models, intermediates, and diblock co-oligomers were characterized by 1 H, 19 F, and 13 C NMR spectroscopy as well as matrix assisted laser desorption ionization (MALDI) and atmospheric pressure solids analysis probe (ASAP) time-of-flight mass spectrometry (TOF-MS). † Electronic supplementary information (ESI) available. See Scheme 1 Synthesis of oligo(hexafluoropropylene oxide)-b-polyethylene glycol, oligo(HFPO)-b-PEG diblock surfactant by radical addition of [oligo(HFPO)] primary iodide onto allyl PEG followed by a selective reduction of the iodine atom. Paper Polymer Chemistry 80 | Polym. Chem., 2015, 6, 79-96This journal is

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“…Samples may be characterized directly on the probe without sample preparation. This technology has been successfully applied for the determination of drugs (Petucci and Diffendal 2008), steroids (McEwen and Larsen 2009), contaminants (Bruns et al 2010), crude oils (Ahmed et al 2011), and synthetic polymers (Smith, Cameron, and Mosely 2012). However, few studies on coal have employed this technique.…”

Section: Introductionmentioning

confidence: 98%

Characterization of Extracts from Geting Bituminous Coal

Wei

Yang

et al. 2014

Analytical Letters

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Geting bituminous coal (GBC) was exhaustively extracted by isometric carbon disulfide/acetone at ambient temperature to provide twenty extracts and a residue. The extracts were characterized Downloaded by [University of Connecticut] at 10:45 01 April 2015 2 by gas chromatography -mass spectrometry, Fourier-transform infrared spectroscopy, and atmospheric pressure solids analysis probe time-of-flight mass spectrometry. Geting bituminous coal and its residue were also characterized by scanning electron microscopy. In total, approximately 11.5 percent of the organic material was extracted. The yield from Geting bituminous coal significantly decreased with increased extraction time. Gas chromatographymass spectrometry indicated that the extracts were primarily composed of alkanes, cyclanes, arenes, cyclenes, and heteroatomic compounds. The arenes were the most abundant species. The organic species decreased and had higher molecular weights at longer extraction times. The combination of multiple techniques was capable of identifying the composition of the extractable species from coal.

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Evaluating Atmospheric pressure Solids Analysis Probe (ASAP) mass spectrometry for the analysis of low molecular weight synthetic polymers

Cited by 60 publications

References 55 publications

New mass spectrometry techniques for studying physical chemistry of atmospheric heterogeneous processes

New mass spectrometry techniques for studying physical chemistry of atmospheric heterogeneous processes

A new oligo(hexafluoropropylene oxide)-b-oligo(ethylene oxide) diblock surfactant obtained by radical reactions

Characterization of Extracts from Geting Bituminous Coal

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