- Optimization and validation of a method of analysis for fenitrothion and its main metabolites in forestry air samples using sorbent tubes with thermal desorption cold trap injection and gas chromatography-mass spectrometry. Baroja, O., Unceta, N., Sampedro, M.C., Goicolea, M.A., Barrio, R.J. Journal of chromatography. A. (2004)