Palmgren M S, Lee T C
Am Ind Hyg Assoc J. 1984 Mar;45(3):168-71. doi: 10.1080/15298668491399587.
Insecticides applied to grain may be present in dust generated during grain handling and could expose workers to high insecticide concentrations, or be fed to animals in the form of pelleted grain dust. Residual levels of two organophosphate insecticides, malathion and diazinon, were measured in 31 samples of grain dust collected from six terminal grain elevators along the Mississippi River in the New Orleans area. These grain elevator samples and additional spiked samples were extracted and analyzed by gas chromatography. The lower limit of detection for malathion was 0.1 micrograms/g and for diazinon, 0.01 micrograms/g. Recovery of malathion from samples spiked with less than 1 micrograms/g was erratic. Mean recoveries of both malathion and diazinon from spiked samples ranged from 83 to 92% at levels of 1 to 50 micrograms/g of dust. Samples of grain dust from the elevators contained 0.17 to 32 micrograms of malathion/g of dust, but diazinon was not detectable at the 0.01 micrograms/g limit of detection.
施用于谷物的杀虫剂可能存在于谷物处理过程中产生的粉尘中，这可能会使工人暴露于高浓度的杀虫剂中，或者以颗粒状谷物粉尘的形式被动物摄入。在新奥尔良地区密西西比河沿岸六个码头谷物升降机采集的31份谷物粉尘样本中，测量了两种有机磷杀虫剂马拉硫磷和二嗪农的残留水平。这些谷物升降机样本以及额外的加标样本通过气相色谱法进行提取和分析。马拉硫磷的检测下限为0.1微克/克，二嗪农的检测下限为0.01微克/克。从加标量低于1微克/克的样本中回收马拉硫磷的情况不稳定。在粉尘含量为1至50微克/克的加标样本中，马拉硫磷和二嗪农的平均回收率在83%至92%之间。升降机的谷物粉尘样本中，每克粉尘含有0.17至32微克的马拉硫磷，但在0.01微克/克的检测限下未检测到二嗪农。
