Cg. Zambonin et al., Solid phase microextraction coupled to gas chromatography mass spectrometry for the determination of the adsorption coefficients of triazines in soil, ANALYST, 123(12), 1998, pp. 2825-2828
Solid phase microextraction coupled to gas chromatography-mass spectrometry
(SPME-GC-MS) was used to determine the adsorption coefficients (K-oc) for
six target triazines in soil and sediment samples with different organic ma
tter contents and textures. SPME-GC-MS was used in conjunction with a conve
ntional batch equilibrium method. The recoveries of the selected triazines
from soils and sediments having organic carbon contents in the range 0.2-2.
4% were satisfactory. Drawbacks of conventional analytical techniques are a
voided; owing to the selectivity of SPIME-GC-MS, no sample pre-treatment or
solvent enrichment steps were required so that K-oc values could be easily
determined. Moreover, the sensitivity of the technique makes it possible t
o work at low triazine concentrations (50-500 ng g(-1)) where the Freundlic
h adsorption isotherm can be considered linear.