Ytterbium purification by an electrolysis reduction in sulfuric acid medium was investigated without nitrogen or argon protection, in which Ru-Ir-Ti alloy nets and mercury were used as anode and cathode, respectively....Ytterbium purification by an electrolysis reduction in sulfuric acid medium was investigated without nitrogen or argon protection, in which Ru-Ir-Ti alloy nets and mercury were used as anode and cathode, respectively. How the conditions such as the acidities of cathode and anode solutions, and the concentration of Yb（ Ⅲ ） to affect the circuit and ratio of Yb（ Ⅱ ）/Yb （ Ⅲ ） in electrolysis reduction were studied.展开更多
An innovative method for the ultrasensitive detection of mercury by solution anode glow discharge atomic emission spectroscopy(SAGD-AES) coupled with hydride generation(HG) was first investigated.In this method,the me...An innovative method for the ultrasensitive detection of mercury by solution anode glow discharge atomic emission spectroscopy(SAGD-AES) coupled with hydride generation(HG) was first investigated.In this method,the mercury vapor generated by the HG was transmitted to the SAGD through the miniature hollow tungsten tube for excitation and detected by a miniaturized spectrograph.A thorough parametric evaluation of the HG and SAGD system was performed,including the type and concentration of ca rrier acid,He flow rate,concentrations of NaBH4,discha rge current and discharge gap.Under optimal operating conditions,the detection limit for Hg^(2+) achieved 0.03 μg/L,with a relative standard deviation of 1.1% at the Hg^(2+) concentration of 5 μg/L.Moreover,the correlation coefficient of the calibration curve was 0.9996 in the range between 0.1 and 10 μg/L.The accuracy and practicability of HG-SAGD-AES were verified by measuring GBW09101 b(human hair),GBW10029(fish),soil and rice samples.The results showed good agreement with the certified values and values from direct mercury analyzer(DMA).展开更多
As a kind of microplasma sustained in air,solution electrode glow discharge(SEGD)ignited between the liquid electrode and metal electrode is attractive to the fields of optical emission spectrometry and mass spectrome...As a kind of microplasma sustained in air,solution electrode glow discharge(SEGD)ignited between the liquid electrode and metal electrode is attractive to the fields of optical emission spectrometry and mass spectrometry due to its unique advantages,such as low power consumption and low carrier gas consumption.Moreover,the complex and efficient reactions in the liquid phase and plasma phase of SEGD make it considerable research potential in the fields of biology and medicine,material synthesis,electrochemistry.Considering the close relationship between the various fields on SEGD,here we are devoted to provide an overview of the development of SEGD in various fields.More importantly,a systematic discussion on the discharge mechanism is conducted based on the research process in various fields for getting deeper insight into the SEGD.展开更多
文摘Ytterbium purification by an electrolysis reduction in sulfuric acid medium was investigated without nitrogen or argon protection, in which Ru-Ir-Ti alloy nets and mercury were used as anode and cathode, respectively. How the conditions such as the acidities of cathode and anode solutions, and the concentration of Yb（ Ⅲ ） to affect the circuit and ratio of Yb（ Ⅱ ）/Yb （ Ⅲ ） in electrolysis reduction were studied.
基金the Instrument Development Project of the Chinese Academy of Sciences(No.YZ201539)the National Natural Science Foundation of China(No.21175145)Shanghai Technical Platform for Testing on Inorganic Materials(No.19DZ2290700)。
文摘An innovative method for the ultrasensitive detection of mercury by solution anode glow discharge atomic emission spectroscopy(SAGD-AES) coupled with hydride generation(HG) was first investigated.In this method,the mercury vapor generated by the HG was transmitted to the SAGD through the miniature hollow tungsten tube for excitation and detected by a miniaturized spectrograph.A thorough parametric evaluation of the HG and SAGD system was performed,including the type and concentration of ca rrier acid,He flow rate,concentrations of NaBH4,discha rge current and discharge gap.Under optimal operating conditions,the detection limit for Hg^(2+) achieved 0.03 μg/L,with a relative standard deviation of 1.1% at the Hg^(2+) concentration of 5 μg/L.Moreover,the correlation coefficient of the calibration curve was 0.9996 in the range between 0.1 and 10 μg/L.The accuracy and practicability of HG-SAGD-AES were verified by measuring GBW09101 b(human hair),GBW10029(fish),soil and rice samples.The results showed good agreement with the certified values and values from direct mercury analyzer(DMA).
基金supported by the Instrument Development Project of the Chinese Academy of Sciences(No.YZ201539)the National Natural Science Foundation of China(No.21175145)the Shanghai Technical Platform for Testing and Characterization on Inorganic Materials(No.19DZ2290700)。
文摘As a kind of microplasma sustained in air,solution electrode glow discharge(SEGD)ignited between the liquid electrode and metal electrode is attractive to the fields of optical emission spectrometry and mass spectrometry due to its unique advantages,such as low power consumption and low carrier gas consumption.Moreover,the complex and efficient reactions in the liquid phase and plasma phase of SEGD make it considerable research potential in the fields of biology and medicine,material synthesis,electrochemistry.Considering the close relationship between the various fields on SEGD,here we are devoted to provide an overview of the development of SEGD in various fields.More importantly,a systematic discussion on the discharge mechanism is conducted based on the research process in various fields for getting deeper insight into the SEGD.
