The extraction capability of auram with di-(2-ethylhexyl)monothiophosphoricacid from hydrochloric acid solution has been studied. The extraction capability decreases with theincrease of acidity. It is showed by the sa...The extraction capability of auram with di-(2-ethylhexyl)monothiophosphoricacid from hydrochloric acid solution has been studied. The extraction capability decreases with theincrease of acidity. It is showed by the saturation method and equal Moore series method that thecomposition of the extraction complex is AuR_3. IR and ~1H NMR studies indicate that the extractionmechanism is a cation exchange process through coordination with P=S bonds.展开更多
Determination of soil Se by anodic stripping voltammetry (ASV) with aurum thin-film electrode (ATFE) over-comes the interference of gold peak with selenium peak, and thus has a higher sensitivity with the mininiumdete...Determination of soil Se by anodic stripping voltammetry (ASV) with aurum thin-film electrode (ATFE) over-comes the interference of gold peak with selenium peak, and thus has a higher sensitivity with the mininiumdetectable concentration being 0.017 μg/mL, the standard deviation of the measured results less than 0.012 μg/g,the coefficient of variation lower than 10%, and the recovery rate between 86% to 103%. Besides the measurementconditions, the digestion of soil sample was also studied in detail.展开更多
MO x and Au/MO x catalysts were prepared by the coprecipitation method and their catalytic performance for CO oxidation was evaluated through the feeding gas with or without water vapor. The results showed that the ac...MO x and Au/MO x catalysts were prepared by the coprecipitation method and their catalytic performance for CO oxidation was evaluated through the feeding gas with or without water vapor. The results showed that the activity and the stability of MO x catalysts are greatly dependent on the kinds of metal oxides. The activity order of MO x is Co 3O 4>NiO>Fe 2O 3>CuO>MnO x>ZnO>Al 2O 3>Cr 2O 3>CaO>La 2O 3. The water has negative effect on the activity of MO x (M=Co, Cu, Fe, Mn, Ni and Zn) catalysts. The catalytic activity and stability of Au/MO x catalysts are greatly dependent on the properties of MO x. The water has negative effect on the activity of Au/MO x (M=Ca, Cr, Cu,La and Mn) and on the stability of Au/MO x (M=Al, Co, Fe, Mn, Ni and Zn) at ambient temperature.展开更多
文摘The extraction capability of auram with di-(2-ethylhexyl)monothiophosphoricacid from hydrochloric acid solution has been studied. The extraction capability decreases with theincrease of acidity. It is showed by the saturation method and equal Moore series method that thecomposition of the extraction complex is AuR_3. IR and ~1H NMR studies indicate that the extractionmechanism is a cation exchange process through coordination with P=S bonds.
文摘Determination of soil Se by anodic stripping voltammetry (ASV) with aurum thin-film electrode (ATFE) over-comes the interference of gold peak with selenium peak, and thus has a higher sensitivity with the mininiumdetectable concentration being 0.017 μg/mL, the standard deviation of the measured results less than 0.012 μg/g,the coefficient of variation lower than 10%, and the recovery rate between 86% to 103%. Besides the measurementconditions, the digestion of soil sample was also studied in detail.
文摘MO x and Au/MO x catalysts were prepared by the coprecipitation method and their catalytic performance for CO oxidation was evaluated through the feeding gas with or without water vapor. The results showed that the activity and the stability of MO x catalysts are greatly dependent on the kinds of metal oxides. The activity order of MO x is Co 3O 4>NiO>Fe 2O 3>CuO>MnO x>ZnO>Al 2O 3>Cr 2O 3>CaO>La 2O 3. The water has negative effect on the activity of MO x (M=Co, Cu, Fe, Mn, Ni and Zn) catalysts. The catalytic activity and stability of Au/MO x catalysts are greatly dependent on the properties of MO x. The water has negative effect on the activity of Au/MO x (M=Ca, Cr, Cu,La and Mn) and on the stability of Au/MO x (M=Al, Co, Fe, Mn, Ni and Zn) at ambient temperature.