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本研究工作,取激光显微发射光谱之所长,即用激光脉冲作用于试样,使其气化,形成由原子,分子以及微粒与熔珠所组成的激光羽,然后用载气把所形成的激光羽,输送到相应的吸收液中去。如果被测元素含量很低,为使基体吸收更完全,可以加大吸收液的用量,或者增加吸收管的长度或吸收液的浓度。本实验吸收液的浓度为70%的盐酸,体积为6ml。吸收管为φ10×180mm。在正式送入ICP光谱测定之前,可以对吸收液浓缩,其程度要在ICP光谱最低检出限之上。然后送入ICP光谱仪进行测定。测定相对标准误差为10%,实验过程中没有发现分馏现象和选择吸收现象。
In this work, take the director of laser micro-emission spectroscopy, that is, the role of laser pulses on the sample gasification, the formation of atoms, molecules and particles and beads formed by laser plume, and then with the carrier gas to the The formation of the laser plume, transported to the appropriate absorption solution to go. If the measured element content is very low, in order to absorb the matrix more completely, you can increase the amount of absorption solution, or increase the absorption tube length or absorption solution concentration. The experimental absorption liquid concentration of 70% hydrochloric acid, a volume of 6ml. Absorption tube is φ10 × 180mm. Absorbate solutions can be concentrated prior to formal introduction into ICP spectroscopy to a level above the detection limit of ICP. Then sent to the ICP spectrometer for measurement. The relative standard error of determination was 10%. No fractionation phenomenon and selective absorption phenomenon were found during the experiment.