The developed procedure allowed the individual identification and quantification of benzene and toluene and the determination of the sum of ethylbenzene and xylenes. As it can be seen, benzene was undetected in actual samples, probably as a result of the easy evaporation of this compound, as well as its low concentration in petroleum derivatives (less than 5%, v/v).
Shelby, North Carolina. Shelby is a city in and the county seat of Cleveland County, North Carolina, United States. It lies near the western edge of the Charlotte combined statistical area. The population was 20,323 at the 2010 census.
Shelby, Montana, the county seat of Toole County, is located in north central Montana, approximately 30 miles south of the Canadian border and about 80 miles east of Glacier National Park. The Burlington Northern/Santa Fe east-west main line tracks pass through Shelby linking Chicago to Seattle, and Interstate I-15 gives quick access to north and south destinations.