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, Alabama. Shelby County is a county of the U.S. state of Alabama. As of the 2010 census the population was 195,085. The county seat is Columbiana. The county is named in honor of Isaac Shelby, Governor of Kentucky from 1792 to 1796 and again from 1812 to 1816. Shelby County is included in the Birmingham-Hoover, AL Metropolitan Statistical Area