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首页> 外文期刊>Environmental toxicology and chemistry >VAPOR PRESSURE OF TEN POLYCHLORINATED BIPHENYL CONGENERS AND TWO COMMERCIAL FLUIDS AS A FUNCTION OF TEMPERATURE
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VAPOR PRESSURE OF TEN POLYCHLORINATED BIPHENYL CONGENERS AND TWO COMMERCIAL FLUIDS AS A FUNCTION OF TEMPERATURE

机译：十个多氯联苯和两个商业流体的蒸气压作为温度的函数

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摘要

The Knudsen mass-loss effusion technique was used to measure the vapor pressures of commercial Kanechlor fluids (Kanechlor 300 and Kanechlor 500) and 10 major individual polychlorinated biphenyls (PCBs) in Kanechlors as a function of temperature and ortho-chlorine substitution. From the temperature dependence of vapor pressure, the thermodynamic parameters, such as enthalpies and entropies of sublimation and vaporization, were derived using the Clausius-Clapeyron equation. The results were compared with both experimental and calculated literature values. The ortho-chlorine substitution effects on the vapor pressure of major PCB congeners in Kanechlor mixtures were studied on the same homologous series. Within this series, the greater the number of chlorine substitutions in the ortho-positions, the higher the vapor pressure, because of the ortho-effect.
机译：使用Knudsen质量损失渗出技术来测量商用Kanechlor流体（Kanechlor 300和Kanechlor 500）和Kanechlors中的10种主要的多氯联苯（PCBs）的蒸气压，这些压力是温度和邻氯取代的函数。根据蒸气压的温度依赖性，使用Clausius-Clapeyron方程导出热力学参数，例如升华和蒸发的焓和熵。将结果与实验和计算的文献值进行比较。在相同的同源系列上研究了邻氯取代对主要氯仿混合物中主要PCB同类物的蒸气压的影响。在该系列中，由于邻位效应，邻位的氯取代数越多，蒸气压越高。

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