from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various techniques for the separation of complex mixtures that rely on the differential affinities of substances for a gas or liquid mobile medium and for a stationary adsorbing medium through which they pass, such as paper, gelatin, or magnesia.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of various techniques for the qualitative or quantitative separation of the components of mixtures of compounds; all characterised by the use of a mobile phase (gas or liquid) moving relative to a stationary phase (liquid or solid) - the differences between the rates of migration of the compounds between the two phases effects the separation.
from the GNU version of the Collaborative International Dictionary of English
- n. A treatise on colors.
- n. an analytical and preparative technique for separating substances by differences in their selective adsorption to solids, by passing a liquid over the solid, to which the substances to be separated have usually been adsorbed in a preliminary step. The major variations are column chromatography, in which the substances to be separated are adsorbed to a column with any of a wide variety of adsorbing solids in powdered or granulated form; paper chromatography, in which the solids are applied as a spot at one end of a strip of absorbent paper (such as filter paper), and the liquid is percolated through the paper by capillary action; and thin-layer chromatography (TLC), which is similar to paper chromatography, but the adsorbent material is, instead of paper, a thin layer of finely powdered material, such as cellulose or silica, on a backing of glass or plastic, called a TLC plate. A modern version of column chromatography is high-performance liquid chromatography, usually referred to as HPLC.
from The Century Dictionary and Cyclopedia
- n. A treatise on colors.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a process used for separating mixtures by virtue of differences in absorbency
Chromatography was first developed more than a century ago and solid state gas chromatography is more than 60 years old.
Essentially, chromatography is a filtering process that allows distinct compounds or molecules to be separated by molecular size and weight.
Screening for high-oleic acid by any breeding programs was done by measuring fatty acid content of the seeds by using gas chromatography, which is a destructive method.
High-fructose corn syrup is made through a process called chromatography, or a distillation of the fructose, in which it is exposed to a series of enzymes to convert cornstarch to 90 percent fructose.
Traditionally, these analyses are done with gas chromatography, which is expensive, time-consuming and requires bulky devices and skilled analysts.
This process of separating molecules by size and weight is called chromatography ” so named because it was first used in the laboratory to separate colored dyes.
They analyze a wide variety of chemical compounds, using testing methods such as chromatography or spectroscopy.
Have a thorough understanding of laboratory procedures and laboratory skills, the practices, principles, and theory of specific disciplines such as chromatography, raw material analysis, laboratory instrumentation, etc (essential)
Lastly, the answer is no, we haven't in fact we've had an incredibly strong being full in gas chromatography which is probably the bell weather to that industry for us, no we haven't seen anything turning down since then.
Like flow cytometry, gas chromatography and gas chromatography-mass spectrometry, the technologies used to detect the presence of the chemicals used in the production of plastic, are well established.