Study of an analytical method for butyl alcohol in workplace air by GC

A Known volume of air was drawn through a charcoal tuhe to trap butyl alcohol present. Then the analyte was desorbed with carbon disulfide containing 1% iso-propyl alcohol. An aliquot of the desorbed sample was injected into a Gas chromatograph. The height of the resulting peak was determined and compared with heights obtained from injection of standards. Uuder the experimcnt conditions the variation coefficient of the method was less than 1.6%, and desorption efficiency, breakthrough capaciiy and detection limit were 97.9%, 15.03mg/100mg charcoal and 5.3×10^-4μg, respcctively. Through the field-test, the method can be used in monitoring for industrial hygiene. GC conditions: flame ionization detector, Column (2m stainless steel) packed with 10%/FFAP on 60/80 mesh chromosorb W-AW, 5oml/min Nitregen Carrier gas flow, 80℃ column temperature. 180℃ manifold temperature.