A method of gas chromatographymass (GC-MS) spectrometry was developed for the quantitative analysis of gasoline trace in fire debris. Eight compounds

such as aromatic hydrocarbons

nalkane and naphthalene

were selected as target compounds for quantitative analysis. The results showed that the linear range of eight compounds was 0.1～50 μg/mL with correlation coefficients r

2

more than 0.995．The relative standard deviation (n=7) was less than 5%. Fire debris analysis indicated toluene showed the highest content in fresh gasoline. Three compounds were detected in carpet residues after burning

while eight compounds were detected in cement bricks.