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M. Clauss et al. argues that retention time is not proportional to body mass above 500 grams. [10] That is, smaller species (that are above 500 grams but not too large) have been observed to rival larger species in their mean retention time. Retention time being proportional to food intake was only observed in non-ruminant animals, not ruminants.
In gas chromatography, the Kovats retention index (shorter Kovats index, retention index; plural retention indices) is used to convert retention times into system-independent constants. The index is named after the Hungarian-born Swiss chemist Ervin Kováts , who outlined the concept in the 1950s while performing research into the composition ...
Example chromatogram showing signal as a function of retention time. In chromatography, resolution is a measure of the separation of two peaks of different retention time t in a chromatogram. [1] [2] [3] [4]
A mass chromatogram is a representation of mass spectrometry data as a chromatogram, where the x-axis represents time and the y-axis represents signal intensity. [1] The source data contains mass information; however, it is not graphically represented in a mass chromatogram in favor of visualizing signal intensity versus time.
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Plotted on the x-axis is the retention time and plotted on the y-axis a signal (for example obtained by a spectrophotometer, mass spectrometer or a variety of other detectors) corresponding to the response created by the analytes exiting the system. In the case of an optimal system the signal is proportional to the concentration of the specific ...
Canned and jarred goods should have a "pop" if they are open for the first time, Matthias said. If they don't, this means that the seal could have been broken – putting a person at risk.
The definition of “absolute” in this case is that calibration of retention time on the column with a set of reference standards is not required to obtain molar mass or the hydrodynamic size, often referred to as hydrodynamic diameter (D H in units of nm). Non-ideal column interactions, such as electrostatic or hydrophobic surface ...