Identification of dyes in solid poly(methyl methacrylate) by means of laser desorption Fourier transform ion cyclotron resonance mass spectrometry

Hsu, Annjia T.; Marshall, Alan G.

doi:10.1021/ac00160a020

Cited by 21 publications

(6 citation statements)

References 35 publications

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“…The additive samples were obtained from Ciba-Geigy (Hawthorne, NY), Uniroyal Chemicals (Middlebury, CT), Borg-Warner Chemicals (Morgantown, WV), and Chem Service, Inc. (West Chester, PA). Probe samples were prepared by dissolving [10][11][12][13][14][15][16][17][18][19][20] mg in 1 mL of a suitable solvent (methylene chloride or methanol). Approximately 30 µ , of solution was placed on the probe tip, a 3/4 in.…”

Section: Sectionmentioning

confidence: 99%

“…These studies include direct mass spectrometric analysis of the rubber as well as analysis of the rubber extracts. Recently, 0003-2700/90/0362-0061 $02.50/0 © 1989 American Chemical Society Marshall et al (10) have applied laser desorption/ Fourier transform ion cyclotron resonance (LD/FT-ICR) mass spectrometry to identify dyes in poly(methyl methacrylate) polymers. Blease et al ( 11) and Wilkins et al (12) have also reported the spectra of several additives using LD/FT-ICR.…”

Section: Introductionmentioning

confidence: 99%

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Laser desorption Fourier-transform ion cyclotron resonance mass spectrometry of polymer additives

Asamoto¹,

Young²,

Citerin³

1990

Anal. Chem.

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Laser desorption/Fourler transform Ion cyclotron resonance mass spectrometry Is found to be a viable method for Identifying polymer additives In polyethylene extracts. Reference spectra were obtained for 18 antioxidants, 7 UV absorbers, and 4 amide waxes. The spectra were found to contain Intense quaslmolecular Ions (Na+ and K+ adducts) and also structurally Informative fragments, depending on conditions used. The molecular weights of several additives In the diethyl ether extracts of three commercial polyethylenes were determined by using the characteristic Na+/K+ adduct pairs observed In the laser desorption spectra. Two additives were Identified as phenolic antioxidants.

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Section: Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Laser desorption Fourier-transform ion cyclotron resonance mass spectrometry of polymer additives

Asamoto¹,

Young²,

Citerin³

1990

Anal. Chem.

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“…0003-2700/91 /0363-0815$02.50/0 a wide variety of ionization/mass analyzer combinations applied to identical polymer samples (6)(7)(8), it was found that laser desorption mass spectrometry (LD/MS) generally gave the most accurate numberand weight-average molecular weights, with minimal fragmentation of the observed pseudomolecular ions. LD/MS offers the additional advantage that sample preparation is essentially invariant for different compounds; thus, LD/MS is especially well suited for detection of impurities or additives in polymer mixtures (9,10).…”

Section: Introductionmentioning

confidence: 99%

Determination of molecular weight distributions of tert-octyephenol ethoxylate surfactant polymers by laser desorption Fourier transform ion cyclotron resonance mass spectrometry and high performance liquid chromatography

Liang¹,

Marshall²,

Westmoreland³

1991

Anal. Chem.

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Triton polymers are commercial surfactants whose molecular weight distributions are conventionally determined by means of high-performance liquid chromatography (HPLC). However, in the case of the important octylphenol ethoxylates [p-C8H17-C6H4-O-(CH2CH2O)n-H], HPLC cannot resolve individual oligomers of high molecular weight Triton surfactants (e.g., greater than 2000 u or so; u = unified atomic mass unit). In this paper, we show that laser desorption Fourier transform ion cyclotron resonance mass spectrometry (LD/FT/ICR/MS) provides a simple and accurate measure of such Triton surfactant molecular weight distributions up to at least 3500 u, based on a single-shot laser pulse measurement of a few seconds duration. Comparison of LD/FT/ICR/MS and HPLC molecular weight distributions of low molecular weight surfactants shows that laser desorption/ionization produces minimal fragmentation and thus offers an accurate measure of the relative abundances of the neutral oligomers, without the need for prior chromatographic separation of the components. Moreover, for all Triton polymer molecular weight distributions (700-3000 u), LD/FT/ICR/MS provides much more highly resolved profiles of oligomer relative abundances. Finally, LD/FT/ICR/MS reveals the presence of poly(ethylene oxide) side products of the polymerization process, which are not observed by HPLC with conventional ultraviolet absorption detection.

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“…Consequently, these techniques are not suitable for the determination of exact molecular weight distributions of the individual components of the polymer molecular weight distribution. In recent years it has been shown that mass spectrometric analysis can provide this information [3][4][5][6][7][8][9][10]. For mass spectrometric characterization of polymer systems, soft ionization techniques are commonly used to lift and convert the large molecules from the condensed phase to gas phase (quasi) molecular ions.…”

mentioning

confidence: 99%

“…The advantage of these techniques is that they minimize fragmentation of the molecular ions, even for high molecular weights, which is imperative for the measurement of the molecular weight distribution. Various "soft" ionization techniques have been used: secondary ion mass spectrometry [3], plasma desorption [4], fast-atom bombardment [5], laser desorption [6], electrospray ionization [7], and MALO!. Of these techniques, especially MALOI has evolved as an important ionization technique for molecular weight determinations of synthetic and biopolymers [8][9][10].…”

mentioning

confidence: 99%

High resolution end group determination of low molecular weight polymers by matrix-assisted laser desorption ionization on an external ion source fourier transform ion cyclotron resonance mass spectrometer

Rooij

Duursma

Heeren

et al. 1996

J. Am. Soc. Mass Spectrom.

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Matrix-assisted laser desorption ionization was performed on an external ion source Fourier transform ion cyclotron resonance mass spectrometer equipped with a 7-T superconducting magnet to analyze end groups of synthetic polymers in the mass range from 500 to 5000 u. Native, perdeutero methylated, propylated, and acetylated polyethylene glycol and polyvinyl pyrrolidone with unknown end-group elemental composition were investigated in the mass range up to 5000 u by using a 2,5-dihydroxybenzoic acid matrix. A small electrospray setup was used for the deposition of the samples. Two methods to process data were evaluated for the determination of end groups from the measured masses of the component molecules in the molecular weight ranges: a regression method and an averaging method. The averaging method is demonstrated to allow end-group mass determinations with an accuracy within 3 mu for the molecular weight range from 500 to 1400 and within 20 mu for the molecular weight range from 3400 to 5000. This is sufficient to identify the elemental composition of end groups in unknown polymer samples.

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Identification of dyes in solid poly(methyl methacrylate) by means of laser desorption Fourier transform ion cyclotron resonance mass spectrometry

Cited by 21 publications

References 35 publications

Laser desorption Fourier-transform ion cyclotron resonance mass spectrometry of polymer additives

Laser desorption Fourier-transform ion cyclotron resonance mass spectrometry of polymer additives

Determination of molecular weight distributions of tert-octyephenol ethoxylate surfactant polymers by laser desorption Fourier transform ion cyclotron resonance mass spectrometry and high performance liquid chromatography

High resolution end group determination of low molecular weight polymers by matrix-assisted laser desorption ionization on an external ion source fourier transform ion cyclotron resonance mass spectrometer

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