Pesticide Residues, Rapid Combustion and Determination of Residues of Chlorinated Pesticides Using a Modified Schoniger Method

1960 ◽  
Vol 8 (2) ◽  
pp. 119-121 ◽  
Author(s):  
D. J. Lisk
Keyword(s):  
Pesticide Residues ◽  
Chlorinated Pesticides ◽  
Rapid Combustion

Simple, Low-Cost Method for Determination of Selected Chlorinated Pesticides in Fat Samples

1982 ◽  
Vol 65 (3) ◽  
pp. 677-679 ◽  
Author(s):  
Stefan M Waliszewski ◽  
Grzegorz A Szymczyński
Keyword(s):  
Gas Chromatography ◽  
Petroleum Ether ◽  
Electron Capture ◽  
Silica Gel ◽  
Pesticide Residues ◽  
Low Cost ◽  
Electron Capture Detection ◽  
Chlorinated Pesticides ◽  
Qualitative Determination

Abstract A method is described for the quantitative and qualitative determination of selected chlorinated pesticides in fat samples. Pesticide residues are extracted with petroleum ether and separated from fat with concentrated H2SO4 instead of the commonly used adsorbents Florisil, alumina, or silica gel. Residues were analyzed by gas chromatography with electron capture detection. Recoveries of fortified samples were approximately 100%.

Estimation of Chlorinated Pesticide Residues in Animal and Vegetable Oils

1968 ◽  
Vol 51 (1) ◽  
pp. 45-47
Author(s):  
J Singh ◽  
J D Lanthier
Keyword(s):  
Pesticide Residues ◽  
Cottonseed Oil ◽  
Chlorinated Pesticides ◽  
Butter Oil ◽  
Average Recovery ◽  
Qualitative And Quantitative ◽  
Basic Alumina ◽  
Seal Oil ◽  
Alumina Activity

Abstract A procedure for the determination of chlorinated pesticide residues in cottonseed oil, hydrogenated marine oil, seal oil, butter oil, and processed beef tallow is described. The oil is spread in the form of a thin film over a large surface area provided by Celite 545. The pesticides are extracted from the oil-coated Celite with 80% aqueous acetonitrile, partitioned into Skellysolve F, and cleaned up on a basic alumina (activity III) column. Gas chromatography with an electron capture detector is used for qualitative and quantitative estimations. The average recovery of six commonly used chlorinated pesticides (aldrin, dieldrin, heptachlor, heptachlor epoxide, lindane, and p,p'-DDT) at levels of 0.1 and 0.25 ppm ranged from 82 to 106%.

Determination of Chlorinated Pesticide Residues in Fat by Electron Capture Gas Chromatography

1964 ◽  
Vol 47 (4) ◽  
pp. 652-659
Author(s):  
K A Mccully ◽  
W P Mckinley
Keyword(s):  
Gas Chromatography ◽  
Stationary Phase ◽  
Electron Capture ◽  
Pesticide Residues ◽  
Screening Method ◽  
Fats And Oils ◽  
Methyl Silicone ◽  
Chlorinated Pesticides ◽  
Pesticide Mixture

Abstract A general screening method has been developed for the cleanup and estimation of chlorinated pesticide residues in fats and oils. The fats were dissolved in benzene-acetone (1 + 19) and then precipitated at — 70 °C. The precipitated fat was removed by filtration through a column of Darco G-60 and Solka Floe in a jacketed filtering funnel. The filtrate was concentrated to a standard volume and an aliquot was analyzed by electron capture gas chromatography. With the exception of a few pesticides in butterfat and aldrin in beef fat, recoveries were 81 to 112% after a mixture of 12 chlorinated pesticides had been added to the fats prior to precipitation. A Pyrex gas chromatographic column containing a 10% stationary phase of mixed silicones (4% SE-30 methyl silicone + 6% QF-1 fluoro silicone) was used to resolve this pesticide mixture. The compounds eluted from the column in the following order: lindane, heptachlor, aldrin, Telodrin, heptachlor epoxide, p,p’-DDE, dieldrin, o,p’-DDT, Rhothane, p,p’-DDT, endrin, and methoxychlor.

Determination of Chlorinated Pesticide Residues in Foods. II. Potassium Permanganate Oxidation for Cleanup of Some Vegetable Extracts

1979 ◽  
Vol 62 (3) ◽  
pp. 685-688
Author(s):  
Takashi Suzuki ◽  
Kiyoshi Ishikawa ◽  
Nobutoshi Sato ◽  
Kei-Ichi Sakai
Keyword(s):  
Sulfuric Acid ◽  
Potassium Permanganate ◽  
Pesticide Residues ◽  
Room Temperature ◽  
Test Tube ◽  
Chlorinated Pesticides ◽  
Dilute Sulfuric Acid ◽  
Radish Root ◽  
Hexane Phase

Abstract A potassium permanganate-dilute sulfuric acid KMnO4/dilute H2SO4 oxidation procedure was developed to supplement Florisil cleanup of some vegetable extracts. Following sample preparation and Florisil cleanup, a reaction mixture of the n-hexane eluate from the Florisil cleanup, 4% KMnO4, and 40% H2SO4 (l+l+l) was shaken in a test tube 2 min at room temperature and then centrifuged. The n-hexane phase was washed with 2 mL 0.1N NaOH and analyzed by GLC. Twelve chlorinated pesticides were completely recovered in the n-hexane phase. Aldrin was not recovered because its extreme instability caused it to decompose even in neutral solutions. Chlorinated pesticide residues in onion, garlic, carrot, and radish root were easily analyzed by the application of this oxidation procedure.

Determination of the Chlorinated Pesticides Residues in Soils Treated with Modern Pesticides

2017 ◽  
Vol 62 (1) ◽  
pp. 75-82
Author(s):  
Vlad Pănescu ◽  
◽  
Sorin Pop ◽  
Mircea Anton ◽  
Mihail Simion Beldean-Galea ◽  
...  
Keyword(s):  
Chlorinated Pesticides ◽  
Pesticides Residues
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