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 County is a county located in the U.S. state of Tennessee. As of the 2010 census, the population was 927,644. It is the state's largest county both in terms of population and geographic area. Its county seat is Memphis, the most populous city in Tennessee. The county was named for Governor Isaac Shelby (1750â1826) of Kentucky. Shelby County is part of the Memphis, TN-MS-AR Metropolitan Statistical Area. It is bordered on the west by the Mississippi River. Within the Mississippi Delta, the county developed as a center of cotton plantations in the antebellum era, and cotton continued as an important commodity crop well into the 20th century.