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水泥中铝和铁含量是对水泥进行分类和质量监督的一个重要依据。通过采用激光诱导击穿光谱技术对水泥样品中的Al和Fe含量进行了定量分析。从光谱强度以及特征谱线信噪比出发,确定单脉冲能量为30 m J光谱积分延迟时间为1μs为最佳实验参数并以此为基础采用内标法去定量分析水泥样品中的Al和Fe。通过内标法建立的Al和Fe元素的定量分析曲线的线性度分别达到了0.998和0.997,同时通过循环反演的方式去检测定量分析的精度,得到铝和铁的最大测量相对偏差分别为2.32%和5.11%,平均相对偏差为1.34%和2.40%。实验结果表明:采用激光诱导击穿光谱去定量分析水泥样品中的Al和Fe在一定的误差范围内是可行的。
Aluminum and iron content in cement is an important basis for the classification and quality supervision of cement. The contents of Al and Fe in cement samples were quantitatively analyzed by laser-induced breakdown spectroscopy. Based on the spectral intensity and the signal-to-noise ratio of the characteristic spectrum, the single pulse energy of 30 m J was determined as the best experimental parameter for the spectral integral delay and based on this, the internal standard method was used to quantify the Al and Fe in the cement samples . The linearity of the quantitative analysis curves of Al and Fe elements established by the internal standard method reached 0.998 and 0.997, respectively. At the same time, the accuracy of the quantitative analysis was tested by means of cyclic inversion. The maximum relative deviations of aluminum and iron were 2.32 % And 5.11% respectively. The average relative deviations were 1.34% and 2.40% respectively. The experimental results show that it is feasible to quantitatively analyze Al and Fe in cement samples by laser induced breakdown spectroscopy.