Determination of Micro Quantities of Some Chlorinated Organic Pesticide Residues in Edible Fats and Oils

1963 ◽  
Vol 46 (2) ◽  
pp. 182-186
Author(s):  
Martin Eidelman
Keyword(s):  
Dimethyl Sulfoxide ◽  
Pesticide Residues ◽  
Edible Oils ◽  
Detection System ◽  
Fats And Oils ◽  
Fish Oils ◽  
Edible Fats ◽  
Background Material ◽  
Chlorinated Organic

Abstract The dimethyl sulfoxide procedure was extended to eleven edible oils and fish oils. After cleanup, the detection system of choice may be used. If extracts of samples larger than 20 g are injected into the microcoulometric detection system, halogenated background material will make evaluation difficult. In fish oils, when paper chromatography is used for evaluation, an Rf indicating aldrin must be further investigated, since it is possible that a spot at this Rf might be background material.

The Extraction and Determination of Polynuclear Hydrocarbons in Paraffin Waxes

1963 ◽  
Vol 46 (6) ◽  
pp. 933-941
Author(s):  
John W Howard ◽  
Edward O Haenni
Keyword(s):  
Dimethyl Sulfoxide ◽  
Absorption Spectra ◽  
Partition Coefficients ◽  
Paraffin Wax ◽  
Chromatographic Techniques ◽  
Polynuclear Compounds ◽  
Pure Compounds ◽  
Background Material ◽  
Paraffin Waxes

Abstract A method for the isolation and determination of polynuclear hydrocarbons in paraffin wax has been developed in which polynuclear compounds are extracted from the wax by diluting a melted wax solution with an aliphatic solvent and extracting the resulting solution with dimethyl sulfoxide. Paper chromatographic techniques are used to separate the compounds from the background material extracted from the wax. The hydrocarbons are rechromatographed until their ultraviolet absorption spectra are comparable to those obtained for pure compounds. Recoveries of 19 polynuclear hydrocarbons added to 100 g samples of paraffin wax at levels of 0.1 ppm or less ranged from 62 to 96%. Recoveries of benzo(a)pyrene and dibenz(a, h) anthracene added to 100 g or 500 g of wax at levels as low as 0.02 ppm or 0.005 ppm, respectively, were in the range 90—100%. The variations in the recoveries are apparently caused by differences in the partition coefficients of the hydrocarbons between the aliphatic solvent and dimethyl sulfoxide and at lower levels by the tendency of some of the compounds to be oxidized. The method has been utilized for the determination of polynuclear hydrocarbons in commercial waxes.

Collaborative Study of the Sweep Co-Distillation Cleanup for Chlorinated Pesticide Residues in Edible Fats and Oils

1969 ◽  
Vol 52 (4) ◽  
pp. 790-797
Author(s):  
Bernadette Malone ◽  
Jerry A Burke
Keyword(s):  
Soybean Oil ◽  
Electron Capture ◽  
Pesticide Residues ◽  
Collaborative Study ◽  
Fats And Oils ◽  
Heptachlor Epoxide ◽  
Chlorinated Pesticides ◽  
Edible Fats

Abstract A collaborative study was made of the sweep co-distillation cleanup method for multiple residues of chlorinated pesticides in edible fats and oils with determination by electron capture GLC using a column of 15% QF-1/10% DC-200 on 80–100 Gas Chrom Q. Heptachlor epoxide, p,p’-DDE, dieldrin, p,p’-TDE, and p,p’-DDT were added at two levels to butterfat and soybean oil. Mean recoveries of pesticides ranged from 86.0 to 102.1% in soybean oil and 86.4 to 98.8% in butter.

Report of the committee on the determination of stability of edible fats and oils

1936 ◽  
Vol 13 (8) ◽  
pp. 203-203 ◽  
Author(s):  
C. A. Coffey ◽  
E. W. Eckey ◽  
J. W. Flynn ◽  
J. B. Geiger ◽  
A. H. Gill ◽  
...  
Keyword(s):  
Fats And Oils ◽  
Edible Fats

scholarly journals Bioactive Compounds in Edible Oils and Their Role in Oxidative Stress and Inflammation

2021 ◽  
Vol 12 ◽  
Author(s):  
Alessandra Mazzocchi ◽  
Valentina De Cosmi ◽  
Patrizia Risé ◽  
Gregorio Paolo Milani ◽  
Stefano Turolo ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Fatty Acids ◽  
Chronic Diseases ◽  
Bioactive Compounds ◽  
Unsaturated Fatty Acids ◽  
Edible Oils ◽  
Fats And Oils ◽  
Bioactive Lipids ◽  
Edible Fats ◽  
Anti Inflammatory

Diet and inflammatory response are recognized as strictly related, and interest in exploring the potential of edible fats and oils for health and chronic diseases is emerging worldwide. Polyunsaturated fatty acids (PUFAs) present in fish oil (FO), such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), may be partly converted into oxygenated bioactive lipids with anti-inflammatory and/or pro-resolving activities. Moreover, the co-presence of phenolic compounds and vitamins in edible oils may prevent the development of chronic diseases by their anti-inflammatory, antioxidant, neuroprotective, and immunomodulatory activities. Finally, a high content in mono-unsaturated fatty acids may improve the serum lipid profile and decrease the alterations caused by the oxidized low-density lipoproteins and free radicals. The present review aims to highlight the role of lipids and other bioactive compounds contained in edible oils on oxidative stress and inflammation, focusing on critical and controversial issues that recently emerged, and pointing to the opposing role often played by edible oils components and their oxidized metabolites.

scholarly journals Smartphone-based molecularly imprinted sensors for rapid detection of thiamethoxam residues and applications

PLoS ONE ◽  
2021 ◽  
Vol 16 (11) ◽  
pp. e0258508
Author(s):  
Sihua Peng ◽  
Aqiang Wang ◽  
Yuyang Lian ◽  
Xi Zhang ◽  
Bei Zeng ◽  
...  
Keyword(s):  
Pesticide Residues ◽  
Rapid Detection ◽  
Rapid Determination ◽  
Detection System ◽  
Residue Analysis ◽  
Differential Pulse ◽  
Detection Technology ◽  
Screen Printed Carbon Electrode ◽  
Relative Standard

In order to achieve rapid detection of thiamethoxam residues in mango, cowpea and water, this study modified the screen printed carbon electrode (SPCE) to make a specific molecular imprinting sensor (Thiamethoxam-MIP/Au/rGO/SPCE) for thiamethoxam. An integrated smartphone platform was also built for thiamethoxam residue analysis. The performance of the complete system was analyzed by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The system was then applied for the rapid determination of thiamethoxam residues in water, mango and cowpea samples. The results showed that the molecular sensor showed good linearity in the range 0.5–3.0 μmol/L of thiamethoxam. The detection limit of thiamethoxam was 0.5 μmol/L. Moreover, the sensor had good reproducibility and anti-interference performance. The average recovery rates of the pesticide residues in water, mango and cowpea samples were in the range of 90–110% with relative standard deviations < 5%. The rapid detection system for thiamethoxam residue constructed in this study was simple, reliable, reproducible and had strong anti-interference. It has broad application prospects in the field detection of thiamethoxam residue, and serves as a valuable reference for the further development of rapid detection technology of pesticide residues in the field of environment and food safety.

scholarly journals Palm Oil Use in North Africa and West Asia

1994 ◽  
Vol 15 (2) ◽  
pp. 1-2
Author(s):  
Mohamed Amr Hussein
Keyword(s):  
Vegetable Oils ◽  
Palm Oil ◽  
North Africa ◽  
Edible Oils ◽  
Fats And Oils ◽  
Local Production ◽  
Potential Harm ◽  
Animal Fats ◽  
Edible Fats ◽  
Excessive Consumption

Edible oils and fats are important sources of food energy in North Africa and West Asia. Because of the high cost of animal fats and increased awareness of potential harm from their excessive consumption, the rise of vegetable oils is increasing. Palm oil has recently been introduced in response to the shortfall in the local production of edible fats and oils, and it is predicted that it will gain increasing acceptance and use because of its versatility and safety.

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