Edwards R D, Lioy P J
Joint Graduate Program In Exposure Measurement and Assessment, Rutgers University and The University Of Medicine And Dentistry of New Jersey-Robert Wood Johnson Medical School, Piscataway 08854, USA.
J Expo Anal Environ Epidemiol. 1999 Sep-Oct;9(5):521-9. doi: 10.1038/sj.jea.7500048.
Indirect sampling techniques to estimate dermal exposure to pesticides on housedust-laden indoor surfaces should demonstrate collection efficiencies, for both particles and pesticide residues, which are similar to those that would adhere to the human skin. A spring-loaded press sampler has been developed that approximated the particle- and pesticide-collection efficiencies of a hand press of a human participant. Particle-collection efficiencies for the hand press and EL sampler, using housedust sieved to <250 microm in diameter, indicated that both sampling techniques collected similar particle fractions over the range of particle sizes. Pesticide-collection efficiencies measured on the participants hand (seven paired tests) were 42+/-7% atrazine, 29+/-8% diazinon, 43+/-8% malathion and 21+/-5% chlorpyrifos. The EL sampler collected 35+/-5%, 31+/-3%, 32+/-5% and 18+/-3% respectively. The collection efficiencies of the two sampling techniques were highly correlated for atrazine, diazinon, and chlorpyrifos (correlation coefficient=0.840, 0.815, and 0.706), but not for malathion (correlation coefficient=0.086).
用于估算室内布满灰尘的表面上皮肤接触农药情况的间接采样技术，应能证明对于颗粒和农药残留的收集效率，与附着在人体皮肤上的情况相似。已开发出一种弹簧加载压力采样器，其颗粒和农药收集效率近似于人类参与者手动按压的情况。使用直径筛分到小于250微米的室内灰尘，对手动按压和EL采样器的颗粒收集效率进行测定，结果表明两种采样技术在该粒径范围内收集的颗粒比例相似。在参与者手上测得的农药收集效率（七组配对测试）分别为：莠去津42±7%、二嗪农29±8%、马拉硫磷43±8%、毒死蜱21±5%。EL采样器分别收集了35±5%、31±3%、32±5%和18±3%。两种采样技术对于莠去津、二嗪农和毒死蜱的收集效率高度相关（相关系数分别为0.840、0.815和0.706），但对于马拉硫磷则不然（相关系数=0.086）。
