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Elemental analysis of airborne particulate matter and cooling water in west Texas residences

机译：德州西部居民住宅中空气传播的颗粒物和冷却水的元素分析

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Ten residences in El Paso, TX were monitored in the summer of 2001 for concurrent indoor and outdoor PM_(2.5) and PM_(10) 10-min mass concentrations in an attempt to establish the indoor-outdoor PM correlation for typical west Texas residences equipped with evaporative coolers. Simultaneously, the modified tapered element oscillating microbalance instruments were used to collect 48-h PM_(2.5) and PM_(10) samples, both indoor and outdoor, for elemental analysis. Water samples were also taken at each home for chemical and PM correlation analysis. The air and water samples were analyzed by inductively coupled plasma―mass spectrometry, with 30 elements identifiable above detection limits in the outdoor PM_(10) samples and fewer elements in the PM_(2.5) and indoor PM_(10). Indoor elemental concentrations in PM_(10) were found to be approximately 50―70% lower than outdoor concentrations in nine of ten homes, consistent with the PM_(10) indoor/outdoor (I/O) mass concentrations previously reported. PM_(2.5) I/ O ratio correlations were not as strong as for PM_(10); however, reduced correlations could be attributed to a pattern of recurring outlier data pairs, consisting of the same three or four elements in all ten homes. Comparison of the elemental concentrations of the evaporative cooler supply water and indoor PM demonstrated little or no correlation, yielding a conclusion that the evaporative cooler was not introducing dissolved solids from the supply water into indoor air. Overall, evaporative cooling appears to provide a cleansing of indoor air.
机译：2001年夏季，对德克萨斯州埃尔帕索的10个住宅进行了监测，监测室内和室外同时存在的PM_（2.5）和PM_（10）10分钟质量浓度，以尝试为配备了典型西德克萨斯住宅的室内外PM相关性与蒸发冷却器。同时，使用改进的锥形元素振荡微量天平仪器收集室内和室外的48小时PM_（2.5）和PM_（10）样品，以进行元素分析。还从每个家庭中抽取水样进行化学和PM相关性分析。空气和水样品通过电感耦合等离子体质谱法进行了分析，其中室外PM_（10）样品中有30种元素高于检测极限，而PM_（2.5）和室内PM_（10）中元素较少。发现十个家庭中有九个家庭的PM_（10）中的室内元素浓度比室外浓度低约50-70％，与先前报道的PM_（10）室内/室外（I / O）质量浓度一致。 PM_（2.5）I / O比的相关性不如PM_（10）。但是，减少的相关性可以归因于重复出现的异常数据对的模式，该数据对由所有十个房屋中相同的三个或四个元素组成。蒸发冷却器给水和室内PM的元素浓度的比较显示很少或没有相关性，得出的结论是蒸发冷却器没有将来自供水的溶解固体引入室内空气。总体而言，蒸发冷却似乎可以净化室内空气。

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