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Articles by Xiandeng Hou
Total Records ( 2 ) for Xiandeng Hou
  Yuelan Xuan , Jing Hu , Kailai Xu , Xiandeng Hou and Yi Lv
  When carbon disulfide (CS2) was passing through the surface of nanosized-CeO2 (nano-CeO2), strong chemiluminescence (CL) emission was observed. Based on this phenomenon, a novel sensitive gas sensor was demonstrated for the determination of CS2. The luminescence characteristics and optimal parameters, such as the morphology of the CeO2, wavelength, temperature and the flow rate of carrier gas, were investigated in detail. Under the optimal conditions, the CL intensity versus the concentration of CS2 was linear in the range of 0.9–12.6 μg mL–1, with a linear correlation coefficient (R) of 0.999 and a limit of detection (S/N = 3) of 3.7 ng mL–1 for CS2. The relative standard deviation (R.S.D.) for the determination of 3.6 μg mL–1 CS2 was 1.2% (n = 5). There is no or weak response to foreign substances, such as alcohol (methanol, ethanol, and n-butanol), aldehyde (formaldehyde and acetaldehyde), acetone, ethyl acetate, chloroform, carbon tetrachloride, toluene, chlorobenzene, hexane and hydrogen sulfide. The stability and durability of the sensor were examined by sampling 7.2 μg mL–1 CS2 vapor into the sensor everyday for 3 h over two weeks, with a long-term R.S.D. of less than 6.0%. Finally, the proposed sensor was applied to the determination of CS2 in artificial air samples.
  Peng Wu , Yunchang Zhang , Rui Liu , Yi Lv and Xiandeng Hou
  Flame furnace atomic absorption spectrometry (FF-AAS) is a newly developed flame atomic absorption spectrometric technique based on arranging a flame furnace onto the top of the flame burner head. In this fundamental investigation, 25 elements were carefully tested by using either thermospray FF-AAS or tungsten coil electrothermal vaporization FF-AAS, of which 15 volatile and semi-volatile elements (Cd, Tl, Ag, Pb, Zn, Hg, Cu, Sb, Bi, Te, In, As, Se, Sn and Au) exhibited better limits of detection compared to those by conventional FAAS; however, non-volatile or refractory elements (Fe, Co, Ni, Cr, Mn, Pd, Pt, Al, Be and V) showed inferior sensitivities by the proposed methods.
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