[Testing of residues of vegetable drugs, organochlorine herbicides and polychlorinated biphenyls (PCB)].

According to the establishment of methods for the determination of PSM residues in vegetable drugs the authors tried to detect organo-chlorinated compounds, which are used in agriculture and industry thus becoming of interest for the quality control of vegetable drugs. In most of the cases the determination was carried out by liquid/liquid partition between acetonitrile/n-hexane in combination with the CC using florisil for sample purification and capillary GC with a methyl silicone rubber column. Some of the results required a confirmation using a Megabore D-608 column (J&W Scientific).

[Residues of lindane and DDT in drugs from wild medicinal plants in a cultivated forest. 2].

The results of testing the persistency of Lindane and DDT in wild medicinal plants collected in a forest after application of bercema-Aero-Super are demonstrated. They illustrate, that after the application the herbs from the first year of vegetation will not meet the state quality requirements. An estimation is given about the toxicological relevance of the pesticide residues in herbs which are used for tea infusions.

[Gas chromatographic determination of sym-triazine herbicides in drugs from vegetable sources (author's transl)].

Several separation phases were tested for effectiveness in the gas chromatographic determination of residues of sym-triazine herbicides in officinal drugs. Carbowax 20 M, OV 225 and OV 330 are well suited for separating this group of active agents. A NP-FID was used as a gas chromatographic detector.