[Analysis of residues of organochlorine compounds in plant drugs. 3. Identification of residues of polychlorobiphenyl compounds by comparison of gas chromatography on packed and capillary columns and GCMS coupling]. / Untersuchung pflanzlicher Drogen auf Rückstände von Organochlorverbindungen. 3. Mitteilung: Identifizierung von Rückständen polychlorierter Biphenyle durch Vergleich von Gaschromatographie an gepackter und Kapillarsäule sowie GC/MS-Kopplung.

The identification of residues of polychlorinated biphenyls in a test sample of Flores Chamomillae could be achieved by the retention behavior at gas chromatographic analyses on packed and capillary columns compared with reference standard Clophen A 60, respectively as well as well by capillary GC/MS using single ion monitoring of substance-characteristic ion mass.

[Plant drugs with residues of organochlorine compounds. 2. Identification of residues of DDT and its analogs by comparison of gas chromatography on packed and capillary columns and GC/MS coupling]. / Untersuchung pflanzlicher Drogen auf Rückstände von Organochlorverbindungen. 2. Mitteilung: Identifizierung der Rückstände von DDT und seinen Analogen durch Vergleich von Gaschromatografie an gepackter und Kapillarsäule sowie GC/MS-Kopplung.

For the GC analysis of DDT isomers and metabolites in extracts of Flores Chamomillae end Radix Valerianae the separation on a packed QF-1/OV-17 column was compared with various capillary columns of the CP-Sil type. Identification of the individual compounds could be achieved by comparing the retention behavior, chemical transformation of DDT and DDE, as well as by capillary GC-MS using single ion monitoring of substance-characteristic ion mass. In this way, residues of p,p'-DDT, o,p'-DDE and p,p'-TDE could be identified.

[Residues of organochlorine compounds in plant drugs. 1. Gas chromatographic determination of residues of organochlorine insecticides]. / Untersuchung pflanzlicher Drogen auf Rückstände von Organochlorverbindungen. 1. Mitteilung: Gaschromatografische Bestimmung von Rückständen chlororganischer Insektizide.

A method for the identification and determination of HCH-and DDT-isomers and their respective metabolites in vegetable drugs is presented. The plant material is extracted with hexane in a Soxhlet apparatus in the presence of silicagel and sodium sulfate. For removing interfering endogenous plant constituents a Celite oleum column cleanup and usually and acetonitrile partitioning to follow are necessary. A mixed stationary phase OV-17/QF-1 has proved effective for the gc separation on packed columns. 3H-ECD is used for detection. For the quantitative determination by using an external standard the peak height measurement is recommended. Recoveries of all insecticides were in the order of 70-105% with coefficients of variation between 6 and 20%. To ensure the results the alkaline treatment and oxidation of extracts are proposed.