1 H-NMR in CDCl 3 and mass spectra
(APCI) in acetone allowed identification of the desired product.
The reagentless BAMS reflectron mass spectra
of Bacillus spores and vegetative cells have been limited to signals having masses of less than m/z 300.
The mass spectra
were acquired at a positive ion mode and an optimized interval of 1200-3000 m/z.
Even small amounts of salts (<1 [micro]mol/L) will significantly reduce ESI sensitivity, owing to the appearance of multiple cation adducts in the mass spectra
Features include a high signal-to-noise ratio, clean mass spectra
, low detector contamination and high peak shape.
Next, while production of fragment ions in mass spectra
was the bread-and-butter of the structural analyst, it obscured the desired molecular mass information in the spectrum.
In addition to providing a practical introduction to mass spectrometry, this book addresses the spectral interpretation of even electron mass spectra
generated from soft ionization techniques-a fast-growing area with tremendous potential in biomolecule analysis.
part of the required supplies are also updated library of mass spectra
precise masses of ions;
Peptide reference materials for evaluation and standardization of chromatographic separations should have favorable chromatographic retention characteristics, whereas those for MS should generate mass spectra
of established intensity and complexity.
Similarly, deconvolution treats complex mass spectra
as a series of simultaneous puzzles.
Deconvolution resolves the mixed mass spectra
of coelutions into individual mass spectra
for each analyte, including the accurate distribution of signal from masses shared by several components in the coelution.
Various fragmentation patterns are described together with analytical information that derives from the mass spectra