Gluck S J, Melcher R G
Am Ind Hyg Assoc J. 1980 Dec;41(12):932-4. doi: 10.1080/15298668091425897.
A method has been developed and validated for the determination of airborne propylene glycol butyl ether ester and the dipropylene glycol butyl ether ester of 2,4-dichlorophenoxyacetic acid. The method is designed to collect samples in the breathing zone of workers for 4 hours at 150 mL/min. using a tube containing 750 mg of Amberlite XAD-2 resin and a portable pump. Recoveries of 85.2% and 81.4% were obtained for the two esters over a range of 0.67 and 13.3 mg/m3 by desorption wih hexane. The extracts were analyzed by electron capture gas chromatography using a highly efficient and inert bonded Carbowax 20-M column packing. The recovery was not affected by 80% relative humidity or refrigerated storage for two weeks. Some loss in recovery was observed for the 0.67 mg/m3 level when samples were stored at room temperature for two weeks. The overall precision of the method for the two esters is +/- 17% and +/- 16% at the 95% confidence level.
已开发并验证了一种用于测定空气中丙二醇丁醚酯和2,4-二氯苯氧基乙酸二丙二醇丁醚酯的方法。该方法旨在使用装有750毫克Amberlite XAD-2树脂的采样管和便携式泵，以150毫升/分钟的流速在工人呼吸带采集4小时的样品。通过用己烷解吸，在0.67至13.3毫克/立方米的范围内，两种酯的回收率分别为85.2%和81.4%。提取物通过电子捕获气相色谱法进行分析，使用高效惰性键合Carbowax 20-M柱填料。80%的相对湿度或冷藏两周对回收率没有影响。当样品在室温下储存两周时，在0.67毫克/立方米水平观察到回收率有一些损失。该方法对两种酯的总体精密度在95%置信水平下为±17%和±16%。
