Natural polymers, humic acid and lignins, were investigated by laser desorption (LD) Fourier transform mass spectrometry. In the vapor phase under LD conditions only positive ions of humic acid were observed up to m/z 700. Under the same conditions all the lignins investigated prefer to form negativ
β¦ LIBER β¦
Laser desorption-Fourier transform mass spectrometry for the characterization of polymers
β Scribed by Brown, Robert S.; Weil, David A.; Wilkins, Charles L.
- Book ID
- 126037350
- Publisher
- American Chemical Society
- Year
- 1986
- Tongue
- English
- Weight
- 775 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0024-9297
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## Abstract Detailed structural information can be obtained without derivatization for a variety of naturally occurring pteridines by using laser desorption Fourier transform mass spectrometry. Laser desorption provides a soft ionization technique for these nonβvolatile compounds and generates char