- 行业: Printing & publishing
- Number of terms: 178089
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- Company Profile:
McGraw Hill Financial, Inc. is an American publicly traded corporation headquartered in Rockefeller Center in New York City. Its primary areas of business are financial, publishing, and business services.
In gas chromatography, the time at which the center, or maximum, of a symmetrical peak occurs on a gas chromatogram.
Industry:Chemistry
A separation technique involving passage of a gaseous moving phase through a column containing a fixed adsorbent phase; it is used principally as a quantitative analytical technique for volatile compounds.
Industry:Chemistry
A technique for separating substances from a fluid substrate; the sample is placed in a capillary tube which is then subjected to a high-voltage current that separates its chemical constituents.
Industry:Chemistry
In gas chromatography, the product of retention time and flow rate.
Industry:Chemistry
A form of gas chromatography in which the fixed phase (column packing) is a liquid solvent distributed on an inert solid support.
Industry:Chemistry
A highly efficient type of gas chromatography in which the gaseous sample passes through capillary tubes with internal diameters between 0.2 and 0.5 millimeter and lengths up to 100 meters, and adsorption takes place on a medium that is spread on the inner walls of these tubes.
Industry:Chemistry
A technique of bonded-phase chromatography in which the stationary phase is nonpolar and the mobile phase is polar.
Industry:Chemistry
An analytical technique for gases; the gas may be measured by instrumental methods or through chemical reactions with specific reagents.
Industry:Chemistry
A form of capillary electrophoresis in which a polyacrylamide gel (or other polymeric material) is placed inside the capillary and separation is based on size and charge; often used to separate oligonucleotides and proteins.
Industry:Chemistry
Paper chromatography in which the low-polarity phase (such as paraffin, paraffin jelly, or grease) is put onto the support (paper) and the high-polarity phase (such as water, acids, or organic solvents) is allowed to flow over it.
Industry:Chemistry
