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 used to separate pigments. The word comes from the Greek: 'chroma' meaning colour and 'graphein' meaning to write.To analyse a mixture, thin layer chromatog â¦ raphy (TLC) is commonly used (often simple paper chromatography is carried out in schools).hromatography is used to separate pigments. The word comes from the Greek: 'chroma' meaning colour and 'graphein' meaning to write.