Supported by. Venezuelaâs economy is dominated by the oil industry, and it has the largest proven reserves of crude oil in the world. President Hugo Chavez, who was elected in 1998 on a populist platform, consolidated state control over the economy and nationalized its telephone and electricity companies.
Chromatography (/ËkroÊmÉËtÉÉ¡rÉfi/ ; from Greek ÏÏá¿¶Î¼Î± chroma which means color and Î³ÏÎ¬ÏÎµÎ¹Î½ graphein to write) is the collective term for a set of laboratory techniques for the separation of mixtures.he purpose of preparative chromatography is to separate the components of a mixture for more advanced use (and is thus a form of purification). Analytical chromatography is done normally with smaller amounts of material and is for measuring the relative proportions of analytes in a mixture.
Chromatography is such an important technique that two nobel prizes have been awarded to chromatographers. Over 60% of chemical analysis worldwide is currently done with chromatography or a variation thereon. Chromatography is used in many different ways. Some people use chromatography to find out what is in a solid or a liquid. It is also used to determine what unknown substances are. The Police, F.B.I., and other detectives use chromatography when trying to solve a crime. It is also used to determine the presence of cocaine in urine, alcohol in blood, PCB's in fish, and lead in water. Chromatography is used by many different people in many different ways. Chromatography is based on differential migration. The solutes in