Electrospray ionization(ESI) and atmospheric pressure chemical ionization(APCI) techniques for liquid chromatography–tandem mass spectrometry(LC–MS/MS) determination of levonorgestrel were evaluated.In consideration of difference in ionization mechanism,the two ionization sources were compared in terms of LC...
Waters AllianceTM Systems for LC/MS ESI/APCI Applications MaxEnt:: An Advanced Maximum Entropy Based Tool for Disentangling the Electrospray Mass Spectra from Biopolymer Mixtures Highlights: The Electrospray (ESI) mass spectrum of a biopolymer (e.g. protein, glycoprotein, or oligonucleotide) is ...
Waters AllianceTM Systems for LC/MS ESI/APCI Applications The Utility of Maximum Entropy Processing Software as Applied to Insulin Analysis Using Electrospray Mass Spectrometry (ESI) on the Waters AllianceTM LC/MS System Featuring the Platform LCZ Detector Highlights: An insulin sample was investigated...
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Inconsideration of difference in ionization mechanism, the two ionization sources were compared in terms of LCconditions, MS parameters and performance of method. The sensitivity for detection of levonorgestrel with ESIwas 0.25 ng/mL which was lower than 1 ng/mL with APCI. Matrix effects were ...
In consideration of difference in ionization mechanism, the two ionization sources were compared in terms of LC conditions, MS parameters and performance of method. The sensitivity for detection of levonorgestrel with ESI was 0.25 ng/mL which was lower than 1 ng/mL with APCI. Matrix effects were...
detection window offer high selectivity with <2ppm mass difference between measured and calculated values for HMTD.This paper supports recent work performed using ESI-TOF and Orbitrap that demonstrates that the 207.0614 ion observed during the analysis of HMTD is in fact [TMDDD+H]+, and not [M...