气相色谱法估算多环芳烃蒸汽压  

Estimation of Vapor Pressure of Polynuclear Aromatic Hydrocarbons by Gas Chromatography

作　　者：潘绍先[1] 吴弢[1] 姚清晨 贾陈忠 

机构地区：[1]山西大学环境科学系,太原030006

出　　处：《分析化学》1996年第8期906-909,共4页Chinese Journal of Analytical Chemistry

摘　　要：提出用气相色谱相对比保留体积（Vg（r））估算多环芳烃蒸汽压。测定了5种多环芳烃在9种麦克雷诺常数固定相上的Vg（r），用饱和气流法测定其在25℃时蒸汽压（P°），建立了lgP°与1／Vg（r）的回归方程，用该方程估算多环芳烃的P°，绝对值平均误差4．3％，9个方程估算同一多环芳烃，相对标准偏差18．5％。固定相极性对回归方程的相关性无明显影响。讨论了不同估算方法误差。Vapor pressure (P°) of polynuclear aromatic hydrocarbons (PAH) can be estimated by determining gas chromatographic relative specific retention (Vg(r) ). Vg(r) of five PAH on nine stationary phases have been determined. The P° of PAH was determined using saturated gas flow method, and unitary regression equations of lgP° and l/Vg(r) were then established. The P°for different PAH might be estimated with these equations. The relative error and the relative standard deviation of estimated value for the same PAH were 4. 394 and 18. 5% respectively. The P°-Vg(r) correlation was not affected by the polarity of stationary phases. The errors resulting from different methods were also discussed.

关 键 词：气相色谱法 多环芳烃 蒸汽压 

分 类 号：O625.15[理学—有机化学] O657.71[理学—化学]