Flaherty D K, Taylor P M, Hopkins W E, Holland M E, Schlueter D P
Immunology Group, Monsanto Company Environmental Health Laboratory, St Louis, Missouri 63110, USA.
J Occup Environ Med. 1995 Sep;37(9):1116-21. doi: 10.1097/00043764-199509000-00013.
A filter cartridge with a low air-flow resistance was designed for use on a modified half-face respirator worn during the application of alachlor (Lasso) herbicide. The filter trapped large concentrations of alachlor while retaining the ability to trap small respirable droplets. Moreover, alachlor could be recovered from the disassembled cartridge and analyzed by conventional methods. The test cartridges were used in combination with conventional personal air samplers to determine whether the filters trapped more alachlor when compared with personal samplers and to determine accurately the amount of alachlor reaching the breathing zone. Farmers sprayed alachlor in the form of alachlor (N = 7) or alachlor mixed with other herbicides or surfactant (N = 15). An average of 4 x 10(-2) mg or 2 x 10(-4) mg/kg of applied alachlor reached the respirator filters. This concentration was 10-fold higher than the alachlor recovered from the personal samplers. The new filter cartridge is better for determining the amount of alachlor reaching the breathing zone, and there is a low potential for significant inhalation exposure to alachlor during normal spraying operations.
设计了一种低气流阻力的滤筒，用于在使用甲草胺（拉索）除草剂时佩戴的改良型半面罩呼吸器上。该滤筒能截留高浓度的甲草胺，同时保持截留可吸入小液滴的能力。此外，甲草胺可从拆卸的滤筒中回收，并通过常规方法进行分析。将测试滤筒与传统的个人空气采样器结合使用，以确定与个人采样器相比，滤筒是否截留了更多的甲草胺，并准确测定到达呼吸区的甲草胺量。农民以甲草胺形式（N = 7）或甲草胺与其他除草剂或表面活性剂混合形式（N = 15）喷洒甲草胺。平均有4×10⁻²毫克或2×10⁻⁴毫克/千克施用量的甲草胺到达呼吸器滤筒。该浓度比从个人采样器中回收的甲草胺高10倍。新的滤筒更适合于测定到达呼吸区的甲草胺量，并且在正常喷洒操作期间，吸入大量甲草胺的可能性较低。
