Gel permeation chromatography (GPC) is a type of molecular sieving chromatography, where a sample is separated into its constituent parts based on their molecular sizes. This is accomplished by dissolving the sample in a mobile phase (solvent) and passing it through a porous column packing. ...
If you want to master the art of interpreting a chromatogram, you first need to know exactlywhat a chromatogram is. But before moving on to that, let’s first take a look at chromatography, its advantages, types, and other details that will further help in the understanding of a chromatogr...
If you performed chromatography or other process at a slower or faster rate than is usual, state the rate. If you used controls, permit no doubt about their nature. The reader may not be able to guess what you omitted for each control. Resuits 4 of 24 1/ 10/2006 5:30 PM VIVOS ...
How Reversed-Phase Liquid Chromatography Works.The keys to understanding reversed-phase liquid chromatography (LC) are provided at the molecular mechanism level as determined by high accuracy molecular simulation. The essential features of C18 stationary-phase chains in contact with methanol-water and ...
How Gas Chromatography Works First, a liquid sample is prepared. The sample is mixed witha solventand is injected into the gas chromatograph. Typically the sample size is small -- in the microliters range. Although the sample starts out as a liquid, itis vaporizedinto the gas phase. An ine...
In order to test one of these formulations, it is generally recommended that the API be first saturated into the oil phase, which can be done by stirring overnight and filtering and testing API content by ultraviolet (UV) spectroscopy or high-performance liquid chromatography. Oil phases (oil ...
Another area of focus for lab managers and researchers should be to focus on improving the speed of liquid chromatography (LC) separation techniques and using higher-performance columns such as micropac columns to achieve faster sample throughput and consistency. Additionally, an automated, connected ...
Inductively Coupled Mass Spectroscopy (ICP-MS), Ion Exchange Chromatography (IEC)There are other methods that can also be used for targeted analyzes of expected components.The use of appropriate analytical techniques is very important, but this is just a starting point for a successful analysis. Al...
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The thermal desorption gas chromatography system (TD-VOC-GC) was directly connected to the output of the absorption cell of the FTIR beside the FID and O2 sensor. The functional principle of the TD-VOC-GC and other applications e.g. measurements of ozone precursor levels in ambient air and ...