1.THE STUDY ON EFFECT OF PARTICLE SIZE IN BOTANICAL STANDARD SAMPLE ANALYSIS BY SLURRY SAMPLING AND FLUORINATION ELECTROTHERMAL VAPORIZATION (ETV)-ICP-AES
THE STUDY ON EFFECT OF PARTICLE SIZE IN BOTANICAL STANDARD SAMPLE ANALYSIS BY SLURRY SAMPLING AND FLUORINATION ELECTROTHERMAL VAPORIZATION（ETV）－ICP－AES
2.In this paper,the vaporization behaviors of refractory elements (Boron,Chromium,Molybdenum and Silicon)in graphite furnace ETV-ICP-AES have been investigated,and a polytetrafluoroethylene slurry was used as chemical modifier to improve the vaporization of the refractory elements. The factors which influenced the fluorination vaporization process were systematically explored, and a proper vaporization mechanism was proposed.
研究了难熔元素硼、铬、钼和硅在石墨炉电热蒸发进样──ICP－AES中的蒸发行为，探讨了以聚四氟乙烯为氟化剂改善难熔元素蒸发的方法．系统地考察了影响难熔元素氟化蒸发的因素，提出了难熔元素的蒸发机理．
3.The results also indicate that the vaporization rate for UDMH is greater than that for N2O4. So we can draw a conclusion that under oridinary working conditions of liquid propellant rocket engine UDMH behaves supercritical vaporization and N2O4 behaves subcritical vaporization and combustion process is controled by the vaporization rate of N2O4. These have been confirmed by testing of liquid propellant rocket engine.
计算还表明,UDMH的蒸发速度大于N_2O_4的蒸发速度。 因而可以得出结论:在一般液体火箭发动机的工作条件下,UDMH为超临界蒸发,而N_2O_4为亚临界蒸发,而且发动机的燃烧过程主要受N_2O_4的蒸发速度所控制。
4.Data of bubble- point vapor pressure and equilibrium temperature for 11 samples with different compositions originated from two kinds of hydrocarbon fuels were measured by using an inclined ebulliometer with a pump- like stirrer on the basis of the principle of quasi- static method. Correlation between vapor pressures and equilibrium temperatures by the Antoine equation was given with satisfactory precision, from which the vaporization enthalpy and vaporization entropy values were estimated.
采用拟静态沸点计法测定两种碳氢燃料在11种不同配比下的泡点蒸气压和平衡温度,用Antoine方程关联了蒸气压与温度的关系,精度良好,同时计算了气化焓和气化熵.
5.The mechanisms of vaporization/atomization of Cr,Ni,Zr,Nb and Yb in graphite furnace have been studied using electrothermal vaporization inductively coupled plasma mass spectrometry(ETV-ICP-MS).
本文以电热蒸发电感耦合等离子体质谱(ETV-ICP-MS)为手段,探讨了Cr、Ni、Zr、Nb和Yb在石墨炉中的蒸发/原子化机理;
6.The vaporization behaviors of analytes with different volatilities in electrother- mal vaporization(ETV)/inductively coupled plasma(ICP)-atomic emission spectrometry (AES)were studied.
本文考察了电热蒸发进样 ETV/ICP-AES 技术中蒸发电流对不同挥发性元素的信号强度及峰形的影响;
7.A method for the direct determination of B in botanical samples by fluorination electrothermal vaporization (ETV) -ICP-AES technique has been described. The effect of boron on particle diameter, influences of matrix and vaporization behaviour in ETV-ICP-AES was studied in detail.
本文提出了用聚四氟乙烯(PTFE)悬浮体制样电热蒸发(ETV)-ICP-AES直接测定植物试样中硼的新方法,研究了上述元素在该技术中的粒度效应、基体效应和(PTFE)存在下的蒸发行为.
8.The mechanism explains the influence law from several phases such as break of hydrogen molecules, action of plasma cathode current, carrier function of hydrogen bubble for fusible metal molecule vaporization and escape of hydrogen bubble. Hydrogen bubble as molecule vaporizing carrier unit not only enhances the unit productive rate, but also improve the effective vaporization acreage.
该机制从氢的离解、等离子体阴极射流磁泵作用、氢微气相作为熔融金属分子蒸发载体、氢微气相的逃逸等几个阶段来探讨氢对产率的影响机理,认为氢气泡相当于熔融金属的“分子蒸发单元”,这不仅使得氢微气相内蒸发的单位产率很高,也使有效蒸发面积远远大于阳极熔池表面的蒸发面积,从而大幅提高纳米金属粉体产率;
9.Self made polytrifluorochloroethylene slurry(PTFCE) is used as halogenation agent which promotes the vaporization of Ti in electrothermal vaporization inductively coupled plasma atomic emission spectrometry(ETV ICP AES) for the determination of Ti.
本文首次提出以聚三氟氯乙烯（PTFCE）为化学改进剂，应用于悬浮体制样ETV－ICP－AES直接测定固体生物试样中微量钛。
10.From the relation between vaporization heat(or normal boiling point) and carbon number,the correlation between vaporization heat and normal boiling point was theoretically deduced,and a simple but valid equation was fitted:Hυ=23.234×BP~(1.21256)+1502.13.Applied to hundreds of non-polar organics,that equation produces fairly good results.
通过对正烷烃蒸发热、正常沸点与碳数关系的研究,理论推导出蒸发热与正常沸点之间的关系,并拟合得一简单适用的公式:Hυ=23.234×BP1.21256+1502.13。 应用于上百种常见非极性有机物,误差较小。
