Pesková J, Parízek P, Vecera Z
Institute of Analytical Chemistry, Academy of Sciences of the Czech Republic, Brno.
J Chromatogr A. 2001 May 18;918(1):153-8. doi: 10.1016/s0021-9673(01)00733-6.
The wet effluent diffusion denuder (WEDD) preconcentration technique for the determination of methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 1-pentanol, acetone, methyl ethyl ketone, diethyl ketone and methyl n-propyl ketone in air is discussed. The compounds are continuously collected into a thin film of deionized water flowing down the inner wall of the cylindrical wet effluent diffusion denuder. The concentrate is analysed by gas chromatography. Detection limits of alcohols and ketones are as low as 1 microg/l (GC-flame ionization detection) and/or 1 ng/l (GC-MS). This technique could be applicable for the continuous monitoring of ppb (v/v) levels of both alcohols and ketones in the air.
讨论了用于测定空气中甲醇、乙醇、1-丙醇、2-丙醇、1-丁醇、1-戊醇、丙酮、甲乙酮、二乙酮和甲基正丙基酮的湿流出物扩散剥蚀器（WEDD）预浓缩技术。这些化合物被连续收集到沿圆柱形湿流出物扩散剥蚀器内壁向下流动的去离子水薄膜中。浓缩物通过气相色谱法进行分析。醇类和酮类的检测限低至1微克/升（气相色谱-火焰离子化检测）和/或1纳克/升（气相色谱-质谱联用）。该技术可适用于对空气中醇类和酮类的十亿分比（体积/体积）水平进行连续监测。
