This study examined the residue rates of 92 insecticide in the 152 vegetable farming lands in 11 Cities of Gyeongnam. The results from the examination of residual characteristics of Endosulfan which showed the highest detection rate and amount were as follows:
Residues analysis of 92 compounds ...
This study examined the residue rates of 92 insecticide in the 152 vegetable farming lands in 11 Cities of Gyeongnam. The results from the examination of residual characteristics of Endosulfan which showed the highest detection rate and amount were as follows:
Residues analysis of 92 compounds was conducted using GC, HPLC, GC/MS And recovery and CV value of 92 pesticides are 71.5~119.8%, 0.25~10.42% and limit of detection is 0.001~0.05mg/kg.
Among 152 soils the insecticide is detected in 104, which showed 68.4% of detection rate. In the other 48 soils no pesticide was detected. Among the 94 insecticide for analysis, total 24 insecticides were detected including 17 GC compounds such as Bifenthrin and Causafos and 7 LC ingredients such as Carbofuran and Clothianidin. The other 68 compounds were not detected. The range of detected pesticides was 0.005 mg/kg ~ 8.333 mg/kg, among which Endosulfan showed the highest concentration level.
As for the detection frequency, Endosulfan were detected 83 times (54.6%); Chlorfenapyr 37 times (24.3%); Chlorpyrifos and Cadusafos 15 times (9.9%); Lufenuron 14 times (9.2); EPN and Fenobucarb 13 times (8.6%); Bifenthrin 12 times (7.9%), in respective order. Endosulfan showed the highest detection frequency. As for the detection results for each type of pesticide, the organochlonic pesticides (e.g., Endosulfan) were detected 83 times (54.6%), which showed the highest detection rate; organophosphorus pesticides (Cadusafos, Chlorpyrifos, Diazinon, Ethoprophos, EPN) 56 times (36.8%); pyrrole pesticides (Chlorfenapyr) 37 times (24.3%); pyrathroid pesticides (Bifenthrin, Tralomethrin, Fenvalerate, Cypermethrin) 20 times (13.2%), in respective order.
Meanwhile, a variety of insecticides were detected across different regions for various factors including cultivated items, farming environment and farmer's preference for pesticides. Endosulfan with high detection rate was detected in 11 regions; Chlorfenapyr in 7 regions; Chlorpyrifos in 3 regions; Cadusafos in 5 regions; Lufenuron in 4 regions. Thus, Endosulfan, although it is banned, is widely used for the vegetable farming lands and frequently detected in the agricultural products.
When α,β-endosulfan is dissolved, it is transformed into the sulfate form and stays as a toxic metabolite. The pesticide has been sprayed up to recent, or even though it is not sprayed recently, it residues after being dissolved into sulfate.
The excessively sprayed pesticides stay in the soil for a long time and contaminate the environment. In addition, taking the contaminated water or pesticide has negative impacts on human body, so the consistent education for correct use of pesticide is required. In addition, it is also required to monitor the residual amount of some pesticides with high detection frequency to accurately identify the contamination degree of the land and expand the study to the absorption by other crops.
This study examined the residue rates of 92 insecticide in the 152 vegetable farming lands in 11 Cities of Gyeongnam. The results from the examination of residual characteristics of Endosulfan which showed the highest detection rate and amount were as follows:
Residues analysis of 92 compounds was conducted using GC, HPLC, GC/MS And recovery and CV value of 92 pesticides are 71.5~119.8%, 0.25~10.42% and limit of detection is 0.001~0.05mg/kg.
Among 152 soils the insecticide is detected in 104, which showed 68.4% of detection rate. In the other 48 soils no pesticide was detected. Among the 94 insecticide for analysis, total 24 insecticides were detected including 17 GC compounds such as Bifenthrin and Causafos and 7 LC ingredients such as Carbofuran and Clothianidin. The other 68 compounds were not detected. The range of detected pesticides was 0.005 mg/kg ~ 8.333 mg/kg, among which Endosulfan showed the highest concentration level.
As for the detection frequency, Endosulfan were detected 83 times (54.6%); Chlorfenapyr 37 times (24.3%); Chlorpyrifos and Cadusafos 15 times (9.9%); Lufenuron 14 times (9.2); EPN and Fenobucarb 13 times (8.6%); Bifenthrin 12 times (7.9%), in respective order. Endosulfan showed the highest detection frequency. As for the detection results for each type of pesticide, the organochlonic pesticides (e.g., Endosulfan) were detected 83 times (54.6%), which showed the highest detection rate; organophosphorus pesticides (Cadusafos, Chlorpyrifos, Diazinon, Ethoprophos, EPN) 56 times (36.8%); pyrrole pesticides (Chlorfenapyr) 37 times (24.3%); pyrathroid pesticides (Bifenthrin, Tralomethrin, Fenvalerate, Cypermethrin) 20 times (13.2%), in respective order.
Meanwhile, a variety of insecticides were detected across different regions for various factors including cultivated items, farming environment and farmer's preference for pesticides. Endosulfan with high detection rate was detected in 11 regions; Chlorfenapyr in 7 regions; Chlorpyrifos in 3 regions; Cadusafos in 5 regions; Lufenuron in 4 regions. Thus, Endosulfan, although it is banned, is widely used for the vegetable farming lands and frequently detected in the agricultural products.
When α,β-endosulfan is dissolved, it is transformed into the sulfate form and stays as a toxic metabolite. The pesticide has been sprayed up to recent, or even though it is not sprayed recently, it residues after being dissolved into sulfate.
The excessively sprayed pesticides stay in the soil for a long time and contaminate the environment. In addition, taking the contaminated water or pesticide has negative impacts on human body, so the consistent education for correct use of pesticide is required. In addition, it is also required to monitor the residual amount of some pesticides with high detection frequency to accurately identify the contamination degree of the land and expand the study to the absorption by other crops.
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