Laser-induced breakdown spectroscopy (LIBS) quantification technology highly evaluated

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The expert group of the appraisal committee was composed of Academician Jin Guozhao, Academician Zhang Yukui, Academician You Zheng, Academician Gu Dazhao and three experts. The appraisal meeting was presided over by Yan Zecheng, director of the Institute for Science and Technology, and Wu Youhua, executive vice president of the Academy attended the meeting and delivered a welcome speech.

Wu Youhua, Executive Vice President of China Institute of Instrumentation, delivered a welcome speech

(LIBS) can provide in-situ, on-line, or rapid key elemental concentration information for the production process due to its unique advantages of fast multi-element simultaneous measurement, no sample preparation, non-destructive, remote measurement, etc., known as "Future Chemistry Analyze superstars." However, due to the influence of uncontrollable laser-substance interactions (which cannot be precisely controlled by sample preparation), followed by laser-plasma (generated by laser ablation), plasma-ambient gas, plasma-shock (Induced by rapid plasma collisions) Influenced by a variety of uncertainties in the interaction process, resulting in higher signal measurement uncertainty and poor repeatability accuracy in LIBS systems; measurement errors due to matrix effects relatively bigger. These two bottlenecks have led to the large-scale commercialization of LIBS.

The thermal energy department of Tsinghua University is the bottleneck for the existence of LIBS. By studying the laser-induced breakdown spectroscopy laser-samples, laser-plasma, plasma-environmental gas interactions and the influence on the LIBS spectrum, a set of LIBS is proposed. Accurate quantification methods and technologies have been applied in the field of coal quality inspection, metal analysis, and cement raw materials.

The appraisal committee heard the report of the project unit, reviewed the relevant data and conducted field tests. It is believed that this technology has broken through the bottleneck of the measurement uncertainty and accuracy of LIBS and formed a set of LIBS accurate quantification technology with broad application prospects. At the international advanced level.

The appraisal experts and project units give a high degree of evaluation to the work of the society. The project unit will continue to strengthen the in-depth cooperation with the institute. The institute will also give more in terms of the industrialization of scientific research results, standard formulation, project declaration, talent recommendation, etc. Attention and support.

(Original Title: Tsinghua University Laser Induced Breakdown Spectroscopy (LIBS) Quantitative Technology Appraisal Conference Held)