Bouyoucos S A, Melcher R G
Am Ind Hyg Assoc J. 1983 Feb;44(2):119-22. doi: 10.1080/15298668391404482.
A method is described for the collection of ammonia (NH3), monomethylamine (MMA), dimethylamine (DMA), and trimethylamine (TMA) from air and their subsequent determination by ion chromatography. Samples are collected with 800-mg silica gel sampling tubes at a flow rate of 1 L/min for 10 minutes or at 100 mL/min for up to 7.5 hours. Samples collected with sulfuric acid-treated tubes can be stored at room temperature for at least 21 days with no loss in recovery. Untreated samples can be stored in a refrigerator up to 32 days. The method has been validated from 2 to 50 ppm v/v when a 10 L air sample is taken. No loss in recovery was observed when sampling up to 23 L of air at 100% relative humidity. The recovery and total precision (95% confidence level) for NH3, MMA, DMA, and TMA were 91 +/- 12.5%, 93 +/- 10.3%, 92 +/- 9.6% and 84 +/- 17.6%, respectively.
本文描述了一种从空气中采集氨（NH₃）、甲胺（MMA）、二甲胺（DMA）和三甲胺（TMA）并随后通过离子色谱法进行测定的方法。使用800毫克硅胶采样管以1升/分钟的流速采集10分钟样品，或以100毫升/分钟的流速采集长达7.5小时的样品。用硫酸处理过的采样管采集的样品可在室温下保存至少21天，回收率无损失。未处理的样品可在冰箱中保存长达32天。当采集10升空气样品时，该方法在2至50 ppm v/v范围内得到验证。在100%相对湿度下采集多达23升空气时，未观察到回收率损失。氨、甲胺、二甲胺和三甲胺的回收率和总精密度（95%置信水平）分别为91±12.5%、93±10.3%、92±9.6%和84±17.6%。
