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Risk Assessment of Human Exposure to Methidathion during Harvest of Cucumber in Green House
Byoun Ji-Youn,Choi Hoon,Moon Joon-Kwan,Park Hee-Won,Liu Kwang-Hyeon,Ihm Yang-Bin,Park Byeoung-Soo,Kim Jeong-Han Korean Society of ToxicologyKorea Environmental Mu 2005 Toxicological Research Vol.21 No.4
Farmers are generally expressed to pesticides through mixing loding, application activity and harvesting of crop after application of pesticides. The present work investigated the exposure and risk of furathiocarb to workers when harvesting of cucumber was carried out in green house after application of furathiocarb EC. Glove was used for the hand exposure assessment, socks for foot and dermal patches for the other parts of body. Personal air monitor equipped with a XAD-2 resin was used for the respiratory exposure assessment. During the harvest of cucumber in green house, the initial rate of potential dermal exposure (Day 1) for methidathion was 1.3 mg/hr. The major exposure parts were hand $(78\~83\%),\;thigh\;(5\~7\%)$ and arms $(6\~9\%)$ during 3 days' harvest. No exposure was detected from the respiratory monitoring. For risk assessment, the potential dermal exposure (PDE), the absorbable quantity of exposure (AQE) and the margin of safety (MOS) and margin of exposure (MOE) were calculated. In risk assessment of harvester exposure for 7days, all MOS was > 1 and MOE was > 100 indicating that possibility of risk was little.
Risk Assessment of Human Exposure to Methidathion during Harvest of Cucumber in Green House
Ji-Youn Byoun,Hoon Choi,Joon-Kwan Moon,Hee-Won Park,Kwang-Hyeon Liu,Yang-Bin Ihm,Byeoung-Soo Park,Jeong-Han Kim 한국독성학회 2005 Toxicological Research Vol.21 No.4
Farmers are generally expressed to pesticides through mixing loding, application activity and harvesting of crop after application of pesticides. The present work investigated the exposure and risk of furathiocarb to workers when harvesting of cucumber was carried out in green house after application of furathiocarb EC. Glove was used for the hand exposure assessment, socks for foot and dermal patches for the other parts of body. Personal air monitor equipped with a XAD-2 resin was used for the respiratory exposure assessment. During the harvest of cucumber in green house, the initial rate of potential dermal exposure (Day 1) for methidathion was 1.3 ㎎/hr. The major exposure parts were hand (78~83%), thigh (5~7%) and arms (6~9%) during 3 days’ harvest. No exposure was detected from the respiratory monitoring. For risk assessment, the potential dermal exposure (PDE), the absorbable quantity of exposure (AQE) and the margin of safety (MOS) and margin of exposure (MOE) were calculated. In risk assessment of harvester exposure for 7 days, all MOS was > 1 and MOE was > 100 indicating that possibility of risk was little.
최훈,김정한,Ji-Youn Byoun 한국응용생명화학회 2013 Applied Biological Chemistry (Appl Biol Chem) Vol.56 No.4
Determination of reentry interval for harvesters after application of insecticide methidathion on cucumber in greenhouse was performed. Dislodgeable foliar residue of methidathion ranged from 12.1~222.5 ng/cm2 for 7 days after application. First-order rate constant for methidathion residue on foliage was −0.4915,and half-life was 1.4 days. The reentry interval (REI) without personal protective clothing or equipment was calculated as 44 h (1.8 days), which is not practical, because cucumber is usually harvested everyday during production period due to its fast growing characteristics. However, when harvester wear personal protective clothing or equipment, −69 h (−2.9 days) of REI was determined, indicating they could reenter greenhouse on the day of application. Therefore, harvesters must wear personal protective clothing or equipment for safe harvesting activity in cucumber greenhouse on the day of application.
Choi, Hoon,Byoun, Ji-Youn,Kim, Jeong-Han 한국응용생명화학회 2013 Applied Biological Chemistry (Appl Biol Chem) Vol.56 No.4
Determination of reentry interval for harvesters after application of insecticide methidathion on cucumber in greenhouse was performed. Dislodgeable foliar residue of methidathion ranged from $12.1{\sim}222.5ng/cm^2$ for 7 days after application. First-order rate constant for methidathion residue on foliage was -0.4915, and half-life was 1.4 days. The reentry interval (REI) without personal protective clothing or equipment was calculated as 44 h (1.8 days), which is not practical, because cucumber is usually harvested everyday during production period due to its fast growing characteristics. However, when harvester wear personal protective clothing or equipment, -69 h (-2.9 days) of REI was determined, indicating they could reenter greenhouse on the day of application. Therefore, harvesters must wear personal protective clothing or equipment for safe harvesting activity in cucumber greenhouse on the day of application.