在激光诱导等离子体满足局部热平衡的情况下,玻尔兹曼曲线法是计算等离子体温度的一种重要手段,对该方法的应用进行了引申和扩展。实验验证激光诱导等离子体处于局部热平衡状态,利用Fe的多条原子谱线建立玻尔兹曼曲线,根据建立的曲线对Fe的其他原子谱线强度进行了反演,反演结果与实验测量结果误差在15%以内。土壤中Fe、Ti、Ca等元素的特征谱线较多,易与其他元素的特征谱线产生重叠,通过这种方法能实现部分谱线的识别与判定,通过建立Mn的玻尔兹曼曲线,求出了Mn 405.89 nm谱线的强度,并分析其对Pb 405.78 nm谱线的影响。研究结果表明,玻尔兹曼曲线法可以对谱线识别起到辅助作用,并且可以加深对定标曲线截距的认识。 The Boltzmann curve method is an important method to calculate the plasma temperature under the condition that the laser-induced plasma satisfies the local thermal equilibrium. The application of the method is extended and extended. The experiments show that the laser-induced plasma is in a state of local thermal equilibrium, and the Boltzmann curve is established by using a plurality of atomic lines of Fe. Based on the established curve, the intensities of other atomic lines of Fe are inverted, and the inversion results and the experimental measurement results The error is less than 15%. Soil Fe, Ti, Ca and other elements of the characteristic spectrum more easily with other elements of the characteristic spectral overlap, through this method can be part of the spectrum identification and determination, through the establishment of Mn Boltzmann curve The intensity of the Mn 405.89 nm line was calculated and its effect on the spectral line of Pb 405.78 nm was analyzed. The results show that the Boltzmann curve method can help to identify the spectral lines and deepen the understanding of the intercept of the calibration curve.