The sister peaks in the EIMS differing from one another by fourteen mass units
which are characteristic of saturated hydrocarbon chains.
Scientists had used Cassini's Ion and Neutral Mass Spectrometer, which can only measure up to 100 atomic mass units
, to detect relatively simple organic compounds.
"Now we've found organic molecules with masses above 200 atomic mass units
. That's over ten times heavier than methane."
With use of a relatively inexpensive triply deuterated leucine as the labeled amino acid, a mass increment of 3 atomic mass units
(amu) is added to the mass of each tryptic peptide that contains a labeled leucine residue.
Digital gold currency (or DGC) is a form of electronic money (or digital currency) based on mass units
In light of the above discussion on the limitations of applying the PM values from NAAQS indoors, and the necessary assumptions (often inaccurate) to convert PM counts to mass units
, there is value in using count concentrations and aiming for "lower is better" or a percent reduction rather than a fixed target when addressing indoor PM.
By doing some simple math we can see that the total mass of the silicone repeating unit is 74 atomic mass units
. Of this amount, 30 atomic mass units
(40% of the total) will be lost during decomposition while the other 60% will remain.
Up to now the question of motion mass units
was left undiscussed.
For example, with HRMS, glucose has a measured mass of 179.0556 atomic mass units
(amu), compared with 179 amu as detected by a regular mass spectrometer.
It is comprised of a rosinous or sugar-based matrix material in admixture with a particulate colloidal silica and a polyethylene in the form of a homopolymer, wherein the polyethylene is substantially linear or non-branched, has a molecular weight from about 250 to about 800 unified mass units
, and is present in an amount in the range 0.1% to 5% by weight of the composition.
So while most mass specs can distinguish between compounds weighing between 407 and 408 atomic mass units
(amu) and between 408 and 409 amu, for example, the FT-ICR-MS can detect a substance with a mass of 407.0259 amu.