【摘要】 对于火焰原子吸收/发射光谱分析来说,火焰温度是一个非常重要的参数。然而,一般的测量火焰温度的方法,如钠谱线翻转法等,是比较困难的。我们从Planck-Wein辐射定律出发,导出如下方程,该方程中的三个物理量,从实验上可方便地测得,这样就能准确地计算出火焰温度。该方程为:其中T_F是火焰温度;T_L是标准钨带灯的亮温;I_L是标准钨带灯在5890A处的相对辐射强度;I_F是钠谱线5890A的相对辐射强度;I_L+F是标准钨带灯的光通过钠火焰后,在Na5890A处的相对辐射强度;k是Boltzmann常数;C是光速;h是Planck常数。在实验上测I_L、I_F和I_L+F是比较方便的。实验证明,该方法是可靠的,它比之钠谱线翻转等方法要简单、快速。在任何一台火焰原子吸收/发射光谱仪上都可进行火焰温度的测量。更多还原

【Abstract】 Flame temperature is a very important parameter for flame atomic absorption/emission spectroscopy. However general approaches to meaasure flame temperature, such as sodium line reversal method, are difficult. A new method mesuring flame temperature is proposed here. The method based on the formula deduced by the author from Planck and Wein′s law is very easy. The formula is as follows:Where T_F is flame temperature, T_L is brightness temperature of standard tungsten ribbon lamp, I_L is relative radiation intensity of standard tungsten ribbon lamp in sodium spectral line, I_F is relative radiation intensity of sodium spectral line in the flame, I_L+F is relative radiation intensity emitted from flame superimposed on the relative radiation intensity of tungsten ribbon lamp, k is Boltzmann constant, C is the velocity of light and h is Planck′s constant. I_L, I_F and I_L+F are needed for obtaining flame temperature. This method is better than the sodium line reversal method and other methods for measuring flame temperature.更多还原