User:T.FurgusonII/sandbox
 | This userpage has been blanked. If this is your userpage, you can retrieve the contents of this page in the page history. Alternatively, if you would like it deleted, simply replace the content of this page with {{db-u1}}. |
WP:COPYARTICLE of AH-7921 with additions that were incorporated into the live article by others anyway
Gas Chromatography edit for Chromatography[edit]
Gas chromatography[edit]
There are two types of gas chromatography currently used in lab applications: gas-liquid chromatography (GLC) and gas-solid chromatography (GSC).
Gas-liquid chromatography[edit]
Gas-liquid chromatography (GLC) is the most widely used gas-based chromatographic method across all scientific fields and therefore, is most commonly referenced in the abbreviated form, gas chromatography (GC). Gas chromatography is a separation technique in which an anyalyte is partitioned between a gaseous mobile phase (often helium) and a liquid phase adsorbed or bonded to a solid surface of an inert solid packing material (often silica) or on the walls of a coil of capillary tubing. The working principle of gas chromatography is based on the partition equilibrium of analyte between gas and liquid phases.
The columns used in gas chromatography can either be of the "packed" or "capillary" varieties. Packed columns are the routine work horses of gas chromatography as they often yield adequate performance at a reduced cost (relative to capillary columns). Capillary columns, in contrast, generally provide far superior resolution, especially for complex mixtures. Both types of column are made of non-adsorbent and chemically inert materials relative to the reactivity constraints for an analyte of a particular study. Stainless steel and glass are the usual materials for packed columns and quartz or fused silica for capillary columns.
The working principle of Gas chromatography is based on the partition equilibrium of an analyte between either a solid or viscous liquid stationary phase (often a liquid silicone-based material) and a mobile gas (most often helium). The stationary phase is adhered to the inside of a small-diameter (commonly 0.53 – 0.18mm inside diameter) glass or fused-silica tube (a capillary column) or a solid matrix inside a larger stainless steel tube (a packed column). It is widely used in analytical chemistry; though the high temperatures used in GC make it unsuitable for high molecular weight biopolymers or proteins (heat denatures them), frequently encountered in biochemistry, it is well suited for use in the petrochemical, environmental monitoring and remediation, and industrial chemical fields. It is also used extensively in chemistry research.
Gas-solid chromatography[edit]
Gas-solid chromatography (GSC) is the less popular form of gas-based chromatographic separations. GSC relies on a solid stationary phase in which retention of analytes results from physical adsorption. GSC is limited in practice due to the semipermanent retention of polar molecules and tailing of elution peaks. Because of such factors, GSC is primarily indicated for the separation of gaseous species with a low molecular mass.
Offshore Leaks Information Needed/Request[edit]
Recent developments on the Panama Papers have lead me to investigate several internally linked subjects that plays a pivotal role in the development and understanding of the international impact of these data leaks. As of April 26, the ICIJ has reported that they will be releasing a database with information on more than 200,000 offshore corporations assoc. with the Panama Papers. This is to be combined with information on more than 100,000 entities assoc. with the Offshore Leaks of 2013. Apparently the latter of the two did not receive as much coverage in English-speaking countries; though the German version of the page seems to have enough content, one would be off to a good start with proper translation/migration to the english page.