Chemistry Commons^™

Ultimate Detectability Of Volatile Organic Compounds: How Much Further Can We Reduce Their Ambient Air Sample Volumes For Analysis?, Ki-Hyun Kim

Ki-Hyun Kim

To understand the ultimately lowest detection range of volatile organic compounds (VOCs) in air, application of a high sensitivity analytical system was investigated by coupling thermal desorption (TD) technique with gas chromatography (GC) and time of flight (TOF) mass spectrometry (MS). The performance of the TD-GC-TOF MS system was evaluated using liquid standards of 19 target VOCs prepared in the range of 35 pg to 2.79 ng per μL. Studies were carried out using both total ion chromatograms (TIC) and extracted ion chromatograms (EIC) mode. EIC mode was used for calibration to reduce background and to improve signal to noise. …

Nanocrystalline Amn2o4 (A = Co, Ni, Cu) Spinels For Remediation Of Volatile Organic Compounds—Synthesis, Characterization And Catalytic Performance, Ali Hosseini, Ali Niaei, Darioush Salari, Reza Nabavi

Seyed Reza nabavi

Nanocrystalline AMn2O4 (A = Co, Ni, Cu) manganite spinels were prepared by using the sol–gel auto combustion method under the same

synthesis conditions and their physico-chemical properties were studied by XRD, UV–vis DRS, SEM, BET and FTIR. Besides, the reducibility of

oxides was studied by temperature-programmed reduction (TPR). The relationship between the properties and activity of spinels in oxidation of 2-

propanol and toluene was investigated. Among all, nickel manganite exhibited the most promising activity, in which the completed conversion of 2-

propanol and toluene occurred at 250 and 350 8C, respectively. Higher activity of nickel manganite oxide was explained …