Results 321 to 330 of about 230,711 (334)
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Oxidation of peptides during electrospray ionization
Rapid Communications in Mass Spectrometry, 1993Abstract[M+H+16]+ ions were observed in the electrospray ionization mass spectra of several synthetic and maturally occurring peptides. Initial results have shown that the appearance of the modification is dependent on the field strength at the electrospray needle and the flow rate of the solution passing through the capillary.
Gert Talbo +2 more
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Electrospray ionization mass spectrometry of metalloporphyrins
Journal of Mass Spectrometry, 1998The magnesium, nickel, copper, zinc and vanadium metalloporphyrins from octaethylporphyrin, etioporphyrin I and tetraphenylporphyrin were characterized using electrospray ionization mass spectrometry (ESI-MS). The ion abundance of each of the porphyrins present in binary mixtures was monitored as a function of the porphyrin concentration and is ...
Patrick A. Limbach, Victor E. Vandell
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Secondary Electrospray Ionization
2014This chapter details the technique called extractive electrospray ionization (EESI) and describes its state-of-the-art developmental, mechanical and experimental aspects and shows its most important applications. EESI is a sensitive, matrix-tolerant secondary electrospray ionization technique, which is in the focus of ongoing investigations.
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Generating Electrospray Ionization on Ballpoint Tips
Analytical Chemistry, 2016In this study, we report a simple and economical ballpoint electrospray ionization mass spectrometry (BP-ESI-MS) technique. This combines a small ballpoint tip with a syringe pump for the direct loading and ionization of various samples in different phases (including solution, semisolid, and solid) and allows for additional applications in surface ...
Yan Zhou +5 more
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Electrospray Laser Desorption Ionization
2019Electrospray laser desorption ionization (ELDI) combines the features of both electrospray ionization and laser desorption. It allows direct, sensitive, and rapid analyses of chemical compounds on the sample surfaces. Chemical and biological compounds dissolved in polar and nonpolar solvents can also be characterized directly by ELDI-mass spectrometry (
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Special Feature on Electrospray Ionization
Journal of Mass Spectrometry, 2000Richard M. Caprioli, Graham Cooks
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