engleski

Significance of the Florisil Quality During Organochlorine Pesticide Analysis

Abstract During the determination of chlorinated pesticides in animal fat tissue by application of matrix solid phase dispersion method, in spite of the use of gas chromatograph with a higly selective capillary column, two peaks occur: one with a retention time very similar to that of lindane, and the other almost identical to that of dieldrin. The obtained results indicated that those peaks resulted from florisil of local origin, not from the original FlorisilR. By applying a combined GC/MS system, the results have shown that neither lindane nor diledrin were present. The removal of the first peak (lindane) is possible by the heating of florisil of domestic origin at 680 oC for 4 hours, but for the removal of the other peak (dieldrin), obviously, some other method is required. This was the proof that, in such demanding analyses, it is extremely important to use the original pesticide grade substances to avoid possible interference and misinterpretation of results.

florisil; organochlorinated pesticides; analysis; fat

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