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Common Background Contamination Ions in Mass …
Common Background Contamination Ions in Mass Spectrometry Common background contamination ions encountered in mass spectrometers are polyethylene glycol, polypropylene glycol, phthalates, organic solvent clusters, solvent modifiers, fatty acids, metal ions, tritons, tweens and siloxanes. Metal ions form adducts with varying numbers of
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What are the common contaminants in my GCMS
www.agilent.comTitle: What are the common contaminants in my GCMS Contamination is usually identified by excessive background in the mass spectra. It can come from the GC or from the MSD. The source of the contamination can sometimes be determined by identifying the contaminants. Some contaminants are much more likely to originate in the GC.
Sensitivity, Background, Noise, and Calibration in Atomic ...
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Section 1: Introduction to Radioactive Materials
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www.agilent.comSepta contamination in wash vials or inlet liners can be diagnosed by looking for siloxane polymers in your total ion chromatogram. Each peak in the chromatogram corresponds to a cyclized (ring structure) siloxane molecule. These molecules fragment with very similar patterns. Example spectrum: Common ions for siloxane molecules: 73 147 207 281 355
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X-ray Photoelectron Spectroscopy
assets.thermofisher.comAnother technique that employs ions for bombardment is ion scattering spectroscopy (ISS), which, as its name implies, measures the energy change as different ions are scattered off a surface. ISS is so surfacesensitive that sample contamination can be a serious problem; with careful use, however, ISS can be a useful companion
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www.waters.comCONTROLLING CONTAMINATION IN LC/MS SYSTEMS 715001307 REV.. G 4 OF 33 Use ultra‐pure water Use ultra‐pure water (defined as water that has been purified through a system that targets contaminants detrimental to UPLC®/MS and HPLC/MS systems). Note: See Recommended water purification process, page 29. Ultra‐pure water is sterile and contains no …