Organic acid gas and liquid‐phase measurements in Po Valley fall‐winter conditions in the presence of fog
Organic acid gas and liquid‐phase measurements in Po Valley fall‐winter conditions in the presence of fog
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DOI：
10.1111/j.1600-0889.1988.tb00109.x
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发表时间：
1988-11
期刊：
影响因子：
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通讯作者：
W. Winiwarter;H. Puxbaum;S. Fuzzi;M. Facchini;G. Orsi;N. Beltz;K. Enderle;W. Jaeschke
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文献类型：
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作者：
W. Winiwarter;H. Puxbaum;S. Fuzzi;M. Facchini;G. Orsi;N. Beltz;K. Enderle;W. Jaeschke
本文报道了辐射雾期间气相和液相有机酸的同步测量结果。HCOOH和CH 3COOH的气相浓度在检测限（5 nmolm-3 0.1 ppb）~ 150 nmolm-3（3. 5 ppb）范围内变化很大. HCOOH和CH 3COOH的液相浓度范围分别为11-175和10-269 μM。当雾滴溶液的pH值高于5时，观察到HCOOH与亨利定律平衡的大偏差。我们的假设是，在这个范围内，批量样品的pH值可能不代表与气相平衡的单个液滴的酸度。有机酸在坡谷秋冬条件似乎起源于人为过程。DOI：10.1111/j.1600-0889.1988.tb00109.x
Concurrent gas and liquid phase organic acid measurements during radiation fog episodes are reported. Gas phase concentrations of HCOOH and CH 3 COOH exhibit large variations from the detection limit (5 nmol m -3 0.1 ppb) to 150 nmol m -3 (3.5 ppb). Liquid phase concentration ranges of 11-175 and 10-269 μM were observed for HCOOH and CH 3 COOH, respectively. Large deviations from Henry’s law equilibrium were observed for HCOOH when the pH of fog droplet solutions was above 5. Our hypothesis is that in this range, the bulk sample pH might not be representative of the acidity of individual droplets in equilibrium with the gas phase. The organic acids in the Po Valley fall-winter conditions seem to originate from anthropogenic processes. DOI: 10.1111/j.1600-0889.1988.tb00109.x