• Asian-Australasian Journal of Animal Sciences
• /
• v.13 no.8
• /
• pp.1050-1053
• /
• 2000

Biological evaluation of residual malathion after 168 hrs of single dipping exposure of White Leghorn hens to different concentrations (0, 0.5, 1.0 and 1.5%) of pesticides was investigated. Thirty-two male albino rats divided into four groups of eight each were kept on 20% isoproteinous diet prepared from the meat of these malathion dipped hens. After 30 days feeding trial, the rats were killed by decapitation. No significant change was found in erythrocytes. However, the triglyceride concentration in brain tissue was increased significantly (p<0.05) when dose level of pesticide was 1% in dipping solution. Similarly, malathion exposed poultry meat failed in altering any significant change in the pancreatic amylase and lipase activities of rats. This study concludes the virtual absence of toxic accumulation of pesticide in the meat of birds after 168 hrs of exposure in usual concentration range upto 1.5%.

• Journal of Food Hygiene and Safety
• /
• v.1 no.2
• /
• pp.181-186
• /
• 1986

Organophosphorus insecticide residues were investigated in six kinds of fruits and five kinds of vegetables.The materials used in this experiment were grape, musk melon, apple, peach, plum, apricot, lettuce, green pepper, cucumber, pumpkin and tomato which were collected from June to september 1986 in Seoul. Residual pesticides investigated were Diazinon, Parathion, MEP (Fenitrothion), Malathion, EPN, MPP (Fenthion), PAP (Phenthoate) and Dimethoate and all samples were analysed by gas chromatographic technique with NPD (Nitrogen Phosphorus Detector). No sample was found to approach proposed national maximum residue limits in Korea.

• The Korean Journal of Pesticide Science
• /
• v.13 no.2
• /
• pp.70-78
• /
• 2009

Processing factors of pesticides in milling process of wheat grain, which are consumed and imported at large quantity were examined to establish reasonable MRL of the processed food. Azinphos-methyl, chlorpyrifos, chlorpyrifos-methyl, fenitrothion, malathion, and trichlorfon were selected for the study according to annual usage and the previous detection record in wheat grain. Dipping process for pesticide application was performed in laboratory, while milling process was conducted under pilot plant system. Processing factors were calculated by analyzing residual pesticides on wheat grain and processing products as wheat flour, bran and red dog. Processing factors were 0.05 for azinphos-methyl, 0.06 for chlorpyrifos, 0.05 for chlorpyrifos-methyl, 0.07 for fenitrothion, 0.07 for malathion, 0.06 for trichlorfon, respectively. Recovery test was also performed to establish extraction efficiency of analytical procedure. The recovery value ranged from 93.2% to 98.6% with standard deviation of 0.1-0.9%.

• Journal of Food Hygiene and Safety
• /
• v.7 no.4
• /
• pp.149-156
• /
• 1992

This study was carried out to determine residues of 17 pesticides and provide basic information on dietary safety of 35 kinds of Kangweon-do agricultural products. Residual leyels of organochlorine and organophosphorus pesticides were analyzed by using GLC-ECO and GLC-NPD, respectively. A total of 157 agricultural products of Kangweon-do were analyzed. At least one kind of pesticide residues were detected in 48.4% of the analyzed samples and two or more kinds were found in 15.3%. Residue of Captan was detected in 43 samples of 81 agricultural products which was 53.1%. But residues of Endrin, Captafol, Parathion, Fenitrothion, Fenthion and EPN were not found in the all samples tested. Ranges of the pesticide residue leyels detected were ND-0.142 ppm for organochlorine pesticides, ND-0.075 ppm for organophosphorus pesticides and ND-1.067 ppm for Captan. Results of this monitoring study demonstrated that pesticide residue leyels in Kangweon-do agricultural supply were generally well below regulatory limits.

• Journal of Food Hygiene and Safety
• /
• v.37 no.1
• /
• pp.1-8
• /
• 2022

In this study, the pesticide residues in 106 commercial cereal grains were monitored from February to July 2021. For the investigation, 40 domestic and 66 imported products from large, small-to-medium sized offline and online distribution channels, were collected and analyzed by using the multiresidue method for 341 pesticides on GC/ECD, GC/NPD, GC/MSMS, UPLC/PDA, HPLC/FLD, LC/MSMS. Pesticides were detected in total of 8 samples (7.5%), of which one was from big box retailers, two from small and medium-sized distribution stores, and five from online shopping mall. Five (4.7%) samples were found to have pesticide residues greater than the maximum residue limits (MRLs). The detected pesticides in kidney beans (1 case), mung beans (6 cases), and sorghum (1 case), were MGK-264, chlorpyrifos, thiamethoxam, malathion, piperonyl butoxide, and pirimiphos-methyl. Specifically, an excessive amount of thiamethoxam was found from the imported mung bean (5 cases).

• Journal of Food Hygiene and Safety
• /
• v.35 no.2
• /
• pp.136-145
• /
• 2020

This study was conducted to evaluate pesticide residues and foreign metallic matter on a total of 104 powdered agricultural products in Incheon. Residue testing for 373 pesticides was conducted by GC-MS/MS, LC-MS/MS, GC-ECD, GC-NPD and HPLC-UVD. Foreign metallic matter was detected by magnetic rod. As a result pesticide testing, 7 of the 104 products were found to be within the MRL of the pesticides. The detected pesticides were chlorpyrifos, etofenprox, fenoxanil, malathion, permethrin, tebuconazole and tetraconazole. As for foreign metallic matter, 16 samples were above the allowable limits set by Korean regulations. Therefore, the inspection of residual pesticides in raw material, and the removal of foreign metallic matter will require further stringent attention for the safety of powdered agricultural products.

• The Korean Journal of Pesticide Science
• /
• v.15 no.4
• /
• pp.441-452
• /
• 2011

This study was carried out to survey the residual characteristics of endocrine disruptor (ED)-suspected pesticides in greenhouse soils and assess their leachabilites to groundwater. Greenhouse soils were collected from 40 sites of greenhouse in 2008 in Korea. Sixteen ED-suspected pesticides which had been using in Korea, such as alachlor, benomyl, carbaryl, cypermethrin, 2,4-D, dicofol, endosulfan, fenvalerate, malathion, mancozeb, metribuzin, metiram, methomyl, parathion, trifluralin, and vinclozolin, in the soils, were analyzed by chromatographic methods using GLC-ECD and HPLC-DAD/FLD. Limits of detection (LODs) of the test pesticides ranged from 0.0004 to 0.005 mg/kg. Recoveries of the target pesticides from soil ranged from 72.69 to 115.28%. Four pesticides including cypermethrin were detected in the range of from 0.001 to 2.019 mg/kg, representing that their detection rate from greenhouse soils was 37.5%. The highest detection rate was observed from endosulfan which was detected from 16 site soils of the total samples, indicating that endosulfan is persistent in soil because of its very low mobility and high adsorption characteristics in soil. Based on the groundwater ubiquity scores (GUSs) of the pesticides detected from greenhouse soils, most of them have little possibilities of groundwater contamination except the fungicide vinclozolin with some leaching potential because of high water solubility and very low soil adsorption property.