The research group led by Prof. Zhang Weijun at Anhui Institute of Optics and Fine Mechanics under Hefei Institutes of Physical Science has made new progress on the vacuum ultraviolet (VUV) photoionization mass spectrometry ...
General Physics
May 19, 2020
0
7
Researchers from Daegu Gyeongbuk Institute of Science and Technology (DGIST) have developed an innovative method to visualize up to tens of different proteins simultaneously in the same cell. This technology could help scientists ...
Bio & Medicine
May 12, 2020
0
23
Utrecht scientists have succeeded in measuring the mass of individual molecules. By modifying an existing mass spectrometer and developing special software, the researchers succeeded in making ultra-sensitive measurements. ...
General Physics
Mar 09, 2020
0
475
Current air pollution studies largely rely upon aerosol mass spectrometers, most of which can only measure submicron aerosol (PM1) species—particulate matter with aerodynamic diameter less than 1 μm.
Environment
Mar 09, 2020
1
5
As the ice sheet covering most of Greenland retreats, Florida State University researchers are studying the newly revealed landscape to understand its role in the carbon cycle.
Environment
Mar 05, 2020
3
358
We've all heard, and seen, how a picture paints a thousand words. Now, in a scientific twist on that saying, researchers at the Florida State University-headquartered National High Magnetic Field Laboratory (National MagLab), ...
Analytical Chemistry
Jan 24, 2020
0
342
We typically think about antibiotics as drugs that our doctors prescribe. But they are actually molecular bullets that bacteria use to kill each other—humans merely borrowed and adapted these bioactive compounds to fight ...
Cell & Microbiology
Dec 19, 2019
0
159
Sometimes robots need a place to stay in space, too. NASA is attaching a "robot hotel" to the outside of the International Space Station with the upcoming launch of the Robotic Tool Stowage (RiTS), a protective storage unit ...
Space Exploration
Dec 04, 2019
0
71
It is one of the most common forms of carbon in space: C60, a soccer ball-shaped carbon molecule, but one that has an extra proton attached to it. This is the conclusion of research carried out at Radboud University, which ...
Astronomy
Nov 25, 2019
0
788
A microscopic polymer in the form of a common kitchen implement could give industry exquisite control over coatings.
Polymers
Nov 14, 2019
0
15
Mass spectrometry (MS) is an analytical technique for the determination of the elemental composition of a sample or molecule. It is also used for elucidating the chemical structures of molecules, such as peptides and other chemical compounds. The MS principle consists of ionizing chemical compounds to generate charged molecules or molecule fragments and measurement of their mass-to-charge ratios. In a typical MS procedure:
MS instruments consist of three modules: an ion source, which can convert gas phase sample molecules into ions (or, in the case of electrospray ionization, move ions that exist in solution into the gas phase); a mass analyzer, which sorts the ions by their masses by applying electromagnetic fields; and a detector, which measures the value of an indicator quantity and thus provides data for calculating the abundances of each ion present. The technique has both qualitative and quantitative uses. These include identifying unknown compounds, determining the isotopic composition of elements in a molecule, and determining the structure of a compound by observing its fragmentation. Other uses include quantifying the amount of a compound in a sample or studying the fundamentals of gas phase ion chemistry (the chemistry of ions and neutrals in a vacuum). MS is now in very common use in analytical laboratories that study physical, chemical, or biological properties of a great variety of compounds.
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