Airborne diazinon concentrations during and after outdoor spray application.
Airborne diazinon concentrations during and after outdoor spray application.
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户外喷雾施用期间和之后空气中的二嗪农浓度。
DOI：
10.1080/15459624.2010.486699
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发表时间：
2010
影响因子：
2
通讯作者：
Adgate,JohnL
中科院分区：
文献类型：
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作者：
Raynor,PeterC;Barteková,Andrea;Griggs,JGirard;Simcik,MattF;Adgate,JohnL
通过在喷洒了有机磷农药二氮磷的观赏植物床内的几个地点进行个人采样和区域采样，评估了有机磷农药二氮磷在空气中的浓度。作为测试原型农药监测器的田间工作的一部分，二氮农被用在背包喷雾器上的杜鹃花灌木上，在两个不同的场合。个人和区域采样用于在应用期间和在初始采样之后的多个时间尺度上测量浓度。面积测量表明，使用期间和使用后即刻的二氮磷浓度与空气中二氮磷10μg/m~3的普遍职业接触限值相似。施药者佩戴的个人样本所测得的浓度为申请期间职业限值的57%-82%。因此，喷洒二氮磷的观赏植物附近的施药者和其他任何人都应该使用个人防护装备，包括适当的呼吸保护。在随后的24小时内，浓度随时间大幅下降。2006年，美国环境保护署(EPA)将二氮磷应用于观赏植物后的限制进入间隔(REI)设置为2天，假设只有喷洒后的皮肤暴露是相关的。然而，这项研究的结果表明，使用美国环保局采用的风险评估方法，估计喷洒后吸入暴露造成的潜在剂量所构成的健康风险，与潜在皮肤剂量所造成的风险具有相同的量级。因此，美国环保局在未来开发二氮磷的REIS时，不应排除吸入暴露。
Airborne concentrations of the organophosphate pesticide diazinon were assessed using personal sampling on an applicator and area sampling at several locations within ornamental plant beds sprayed with the chemical. As part of field work testing a prototype pesticide monitor, diazinon was applied to azalea bushes, from a backpack sprayer, on two separate occasions. Personal and area sampling was used to measure concentrations during the application and over multiple time scales after the initial sampling. The area measurements indicated that diazinon concentrations during and immediately after application were similar to the consensus occupational exposure limit (OEL) of 10 μg/m3for airborne diazinon. Concentrations measured from personal samples worn by the applicator were 57–82% of the occupational limit during the application period. Therefore, an applicator and anyone else near ornamental plants being sprayed with diazinon should use personal protective equipment, including appropriate respiratory protection. Concentrations declined substantially with time during the subsequent 24-hr period. In 2006, the U.S. Environmental Protection Agency (EPA) set the restricted-entry interval (REI) after diazinon is applied to ornamental plants to 2 days, assuming only dermal exposures are relevant after spraying. However, the results of this study suggest that the health risks posed by estimated potential doses caused by inhalation exposures after spraying are of the same order of magnitude as the risks posed by potential dermal doses using the risk assessment methodology employed by EPA. Thus, EPA should not dismiss inhalation exposures when developing REIs for diazinon in the future.