EVAPORATION RATES OF MONODISPERSE ORGANIC AEROSOLS IN THE 0.02-MU-M-DIAMETER TO 0.2-MU-M-DIAMETER RANGE
EVAPORATION RATES OF MONODISPERSE ORGANIC AEROSOLS IN THE 0.02-MU-M-DIAMETER TO 0.2-MU-M-DIAMETER RANGE
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DOI：
10.1080/02786828708959137
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发表时间：
1987-01-01
影响因子：
5.2
通讯作者：
SMITH, S
中科院分区：
文献类型：
--
作者：
RADER, DJ;MCMURRY, PH;SMITH, S
采用串联差分迁移率分析仪（TDMA）技术测量了0.02 ~ 0.2 μm直径范围内单分散有机气溶胶液滴的蒸发速率。所调查的物质包括邻苯二甲酸二辛酯（DOP）、癸二酸二酯（DOS）和油酸，所有这些物质都经常用于生产用于仪器校准的单分散气溶胶标准。过渡状态传质表达式用于根据测量的蒸发速率确定蒸汽压力。在25.7°C时，DOP的蒸气压与报道值（2.36 × 10−4dynes/cm2）吻合良好。油酸和DOS在25℃时的蒸汽压分别为2.2 × 10−4dynes/cm2和2.6 × 10−5dynes/cm2。这些数据为这些物种的开尔文方程的有效性提供了直接证据。此外，这些结果表明，由于其蒸气压较低，DOS比其他物种更稳定，因此更适合用作单分散气溶胶标准的材料。
The tandem differential mobility analyzer (TDMA) technique was used to measure evaporation rates of monodisperse organic aerosol droplets in the 0.02- to 0.2-μm-diameter range. The species investigated include dioctyl phthalate (DOP), diocytl sebacate (DOS), and oleic acid, all of which are frequently used to produce monodisperse aerosol standards for instrument calibration. Transition regime mass transfer expressions were used to determine vapor pressures from measured evaporation rates. The vapor pressure of DOP at 25.7°C was found to be in good agreement with reported values (2.36 × 10−4dynes/cm2). Vapor pressures at 25° C for oleic acid and DOS were 2.2 × 10−4dynes/cm2and 2.6 × 10−5dynes/cm2, respectively. The data provide direct evidence for the validity of the Kelvin equation for these species. Also, these results suggest that because of its lower vapor pressure, DOS is more stable than the other species, and is therefore more suitable for use as a material for monodisperse aerosol standards.