quadrupole mass spectrometer
Magnetically enhanced quadrupole mass spectrometer
... A rival “soft” ionisation technique for ionising biomolecules and large organic molecules was originally invented by Tanaka (who shared the Nobel prize for chemistry in 2002 with Fenn) [67]. The method was further ...
252
Chemical ionization quadrupole mass spectrometer with an electrical discharge ion source for atmospheric trace gas measurement
... a mass-to- charge ratio (m/z) of ...time-of-flight mass spectrome- ters (I-CIMS-TOF), which have a high mass resolution and exploit the iodine mass defect for the identification of the el- ...
20
Induced in-source fragmentation pattern of certain novel (1Z,2E)-N-(aryl)propanehydrazonoyl chlorides by electrospray mass spectrometry (ESI-MS/MS)
... triple quadrupole mass spectrometer system (QQQ) typically yields more abundant fragment ions than those produced with resonance excitation in the presence of helium gas in the ion trap (IT) ...low ...
8
Exploring Fundamental Aspects of Proteomic Measurements: Increasing Mass Measurement Accuracy, Streamlining Absolute Quantification, and Increasing Electrospray Response
... the mass measurement accuracy of FT-ICR instruments, the decision was made to develop a method to be utilized for quantification of a protein of interest, C-Reactive Protein ...dilution mass spectrometry ...
174
Quadrupole mass filter operation under the influence of magnetic field
... a quadrupole mass spectrometer for the operation of scanning ion microscope by combining an ion microprobe with the quadrupole equipped secondary ion mass ...
174
A Mass Spectrometric Study of Kratom Compounds by Direct Infusion Electrospray Ionization Triple Quadrupole Mass Spectrometry
... Mitragynine (MG) and its major metabolites 7-hydroxymitragynine (7-OH-MG) are two of the ma- jor components of the plant extract Kratom, which is a tree planted in Southeast Asia. Kratom has long been used by ...
8
PTR-QMS versus PTR-TOF comparison in a region with oil and natural gas extraction industry in the Uintah Basin in 2013
... reaction quadrupole mass spectrometer (PTR-QMS) with a new proton-transfer-reaction time of flight mass spectrom- eter (PTR-TOF) during the Uintah Basin Winter Ozone Study 2013 (UBWOS2013) ...
10
Studies with the aerosol mass spectrometer
... P-TOF mass distribution measurements) or to block/clear the particle beam for “mass spectrum” mode measurements ...the quadrupole mass spectrometer for determination of their ...
57
Gas phase characterization of the noncovalent quaternary structure of Cholera toxin and the Cholera toxin B subunit pentamer
... TOF mass spectrometer (LCT, Waters MS Technologies, Manchester, UK) and a triple quadrupole mass spectrometer (Quattro Ultima, Manchester, ...triple quadrupole instrument, tandem ...
10
The development of a quinquaquadrupole mass spectrometer the study of ion molecule reactions in the gas phase using multiple quadrupole instruments
... triple quadrupole mass spectrometer has also been shown to be useful for the rapid determ ination of carbon monoxide in gas mixtures resulting from the pyrolysis of ...first quadrupole and ...
215
Rapid Identification of Anthocyanin in Ficus Aurata Fruits by Liquid Chromatography-Mass Spectrometry Approach
... The aim of this study was to identify the chemical structure of anthocyanins in the fruits of Ficus aurata. The anthocyanin was detected and characterized using the liquid chromatography system with UV-Vis detection ...
5
Index Catalog // Carolina Digital Repository
... triple quadrupole mass spectrometer with an electrospray ionization source operated in the positive ion ...triple quadrupole allowed for increased sensitivity due to the ability of the first ...
64
The Planet B neutral gas mass spectrometer
... The low limit density value in Table 1 cannot always be realized because background gases, identical to those to be measured, are being emitted from the surrounding surfaces or because of interference at some mass ...
8
The application of beam transport theory to mass spectrometer design
... On his arrival at the A.N.U., the author, under the supervision of Dr W. Compston, who was responsible for the original conception of the project, began a review of the existing ion optical theory. During this period ...
166
A Chemical Ionization Mass Spectrometer for ambient measurements of Ammonia
... Fig. 2. Typical mass spectra taken for the background (red), ambi- ent (blue dotted), and ambient plus calibration mode (green dashed). The main reagent ion signals were (C 2 H 5 OH)H + (47 amu), (C 2 H 5 OH) 2 H ...
13
A new time-of-flight mass spectrometer.
... the mass to charge ratios of the ...every mass spectrometer; the ion source, a mass analyser, and an ion ...the mass analysis may be effected by the use of electrostatic, magnetic, or ...
67
A Time of Flight Mass Spectrometer.
... t Mass S p e c tro m e te r h a s b een c o n s t r u c t e d ...New mass r e s o l u t i o n fo rm u la e w hich a g r e e w ith e x p e r im e n ta l o b s e r v a t i o n s , a r e p r e s e n t e d ...
45
Quadrupole mass filter with fuzzy initial conditions
... The employment of the fuzzy method to solve differential equations has been well studied. In this article, Mathieu differential equations of the quadrupole mass filter (QMF) have been solved by using the fuzzy ...
12
Simulation of Magnetic Field Topology in a Saddle-Shaped Coil of Nuclear Quadrupole Resonance Spectrometer
... nuclear quadrupole resonance (NQR) method ...nuclear quadrupole resonance (NQR) and electron paramagnetic resonance (EPR) microwave spectrometers is their sensitivity which is mostly determined by the ...
7