Volatility of elemental carbon
Volatility of elemental carbon
复制标题
单质碳的挥发性
DOI：
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复制
发表时间：
1994
期刊：
影响因子：
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通讯作者：
H. Cachier
中科院分区：
文献类型：
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作者：
S. Jennings;C. O’Dowd;W. Cooke;P. Sheridan;H. Cachier
一种挥发性技术，即气溶胶颗粒被加热到860 °C的相对较高的温度，被用来推断在爱尔兰西海岸附近的污染空气质量中的元素碳的存在。气溶胶中包含的亚微米尺寸颗粒的元素碳的体积是根据在约730-735 °C的临界起始温度下的数量浓度的下降来估计的，这也是针对实验室碳墨水气溶胶获得的。该技术允许确定元素碳的总细气溶胶体积的体积百分比，和大气气溶胶的黑碳馏分内所含的元素碳的丰度的估计。补充黑碳质量浓度的测量，获得了使用热法和蒸发仪吸收法。这项工作表明，元素碳可以确定使用的挥发性技术，它可以产生的大气气溶胶中的元素碳的分数的大小隔离的信息。
A volatility technique whereby aerosol particles are heated to the relatively high temperature of 860 °C is used to infer the presence of elemental carbon in polluted air masses in the vicinity of the west coast of Ireland. The volume of elemental carbon for submicrometre sized particles contained in the aerosol is estimated from the fall off in number concentration at a critical onset temperature of about 730–735 °C, as also obtained for laboratory carbon ink aerosol. The technique permits determination of the elemental carbon volume percentage of the total fine aerosol volume, and an estimation of the abundance of elemental carbon contained within the black carbon fraction of the atmospheric aerosol. Supplementary black carbon mass concentration measurements were obtained using a thermal method and an aethalometer absorption method. The work suggests that elemental carbon can be identified using the volatility technique and that it can yield size-segregated information on the fraction of elemental carbon in atmospheric aerosol.