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对“超声调制激光微区光谱仪”主要参数,采取混合型正交表L_(18)(2~1×3~7)进行最优化选择试验,得到了一组最优水平组合:A_2B_3C_2D_3E_1F_2G_1H_3。用该水平组合对同一标准样品中的Mg(λ=279.08纳米)和Al(λ=396.15纳米)做了相对标准偏差(RSD)的测定,分别为6.54%和7.56%。此结果表明,其稳定性可与民德LMA-10型激光微区光谱仪相媲美。影响摄谱质量的因素除超声调制固体激光器,辅助电极,主、辅电源和摄谱仪等四个基本部分外,还和干板及其处理,样品的种类及其物理性质等诸因素有关。故摄谱是一种多因素实验,如何使此诸多因素皆处于最佳状态,以保证摄出的谱线质量最好,我们选了一种最有希望的方法——“多因素选优法”。用此方法,恰当安排试验,可减少试验次数,缩短试验时间和避免盲目性,能迅速而有效的得到满意的试验结果。
The optimal selection experiment of “Ultrasonic Modulation Laser Micro-spectrometer ” with mixed orthogonal table L_ (18) (2 ~ 1 × 3 ~ 7) was carried out, and a set of optimal level combination A_2B_3C_2D_3E_1F_2G_1H_3 was obtained. The relative standard deviations (RSDs) of Mg (λ = 279.08 nm) and Al (λ = 396.15 nm) in the same standard sample were measured by this horizontal combination, and were 6.54% and 7.56%, respectively. This result shows that its stability is comparable to that of the German LMA-10 laser micro-spectrometer. The factors that influence the quality of the pictures are related to the four basic parts of ultrasonic solid-state lasers, auxiliary electrodes, main and auxiliary power supplies, and spectrographs, as well as factors such as the dry board and its handling, the type of samples and their physical properties. Therefore, spectrum is a multi-factor experiment, how to make these many factors are in the best condition, in order to ensure the best quality of the spectral line, we have chosen one of the most promising method - “multi-factor optimization law”. With this method, the proper arrangements for the test, can reduce the number of tests, shorten the test time and avoid blindness, can quickly and effectively get satisfactory test results.