1. Burlingme, A. L., Maltby, D., Russell, D. H. & Holland, P. T., Anal. Chem., 60 (1988) 294R–342R.
2. Watson, J. T., Introduction to Mass Spectrometry. Raven, New York, 1985.
3. US EPA, Report, 600 Series Methods. EPA Publication N. EPA 600/4–82–057.
4. Hirschfeld, T., Anal. Chem., 52 (1980) 297A.
5. Gurka, D. F., Hiatt, M. & Titus, R., Anal. Chem., 56 (1984) 1102.