Direct injection of oil or fat into a moderately heated injector enables performance of a kind of head-space technique in the injector: oil or fat is diluted 1:1 with acetone and injected into a vaporizing chamber at 200°C. Components, for example organophosphorus insecticides, evaporate from the oil on the insert wall and are transferred into the column in the splitless mode; the oil slowly flows along the wall to the bottom of the insert and is retained there in a kind of a bag. Using a flame photometric detector, detection limits are below 10 µg/kg.
Determination of organophosphorus insecticides in edible oils and fats by splitless injection of the oil into a gas chromatograph (injector-internal headspace analysis) / Grob, K.; Biedermann, M.; Giuffre', A. M.; Giuffre', Angelo Maria. - In: ZEITSCHRIFT FUER LEBENSMITTEL-UNTERSUCHUNG UND-FORSCHUNG. - ISSN 0044-3026. - 198:(1994), pp. 325-328. [10.1007/BF01193183]
Determination of organophosphorus insecticides in edible oils and fats by splitless injection of the oil into a gas chromatograph (injector-internal headspace analysis)
GIUFFRE', Angelo Maria
1994-01-01
Abstract
Direct injection of oil or fat into a moderately heated injector enables performance of a kind of head-space technique in the injector: oil or fat is diluted 1:1 with acetone and injected into a vaporizing chamber at 200°C. Components, for example organophosphorus insecticides, evaporate from the oil on the insert wall and are transferred into the column in the splitless mode; the oil slowly flows along the wall to the bottom of the insert and is retained there in a kind of a bag. Using a flame photometric detector, detection limits are below 10 µg/kg.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.