Petroleum technician

Petroleum Technician This science technician uses instruments to measure and record physicai and geoiogicai information about oii or gas weiis. For exampie, a petroieum technician might test a geoiogicai sampie to determine its petroieum content and its minerai or eiement composition. For more information on chemistry careers, visit qlencoe.com. 

The best method for urinary estrogens of clinical importance is that devised by Brown (B20, B21). This depends on the modification of the Kober-Ittrich color reaction to provide an extremely sensitive fluorescence reaction (see also S2). Acid hydrolysis (15 minutes) is followed by either extraction (2X1 volume) evaporation to dryness a partition between petroleum ether-benzene and water (estriol) and 1.6% NaOH (estradiol, estrone). The two solutions are methylated (10 minutes) and extracted with ether the ether is evaporated, and the residues are run on alumina columns. In the original procedure the less specific and sensitive form of the Kober reaction required more extensive purification one technician could complete four estimations in 1.5-2 days. The new procedure enables four determinations to be made every 5-6 hours. An ultrarapid version of this method for specialized obstetric use has been devised by Gemzell and his group and will be published shortly. By this method, twelve samples can be measured in 3 hours by one technician. 

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