CAJ | 학술논문

为了提高激光诱导击穿光谱技术对物质成分的检测水平，在实验中加入了平面反射镜装置约束激光等离子体。用Nd：YAG纳秒脉冲激光激发产生土壤等离子体发射光谱，测量绘制了元素的定标曲线，定量分析了土壤样品中重金属元素Cr和Pb ，并与不加入平面反射镜装置条件下的检测结果进行比较。计算表明，实验中加入平面反射镜装置以后，元素Cr和Pb的测量结果的相对标准偏差与无平面反射镜装置时的相比较，分别从5.22%和8.12%降低到了3.43%和3.94%；而元素分析检出限分别由4.13×10-3％和62.54×10-3％降低到2.61×10-3％和44.22×10-3％。可见，利用平面反射镜装置能够明显提高激光诱导击穿光谱技术的测量精度。
위료제고격광유도격천광보기술대물질성분적검측수평，재실험중가입료평면반사경장치약속격광등리자체。용Nd：YAG납초맥충격광격발산생토양등리자체발사광보，측량회제료원소적정표곡선，정량분석료토양양품중중금속원소Cr화Pb ，병여불가입평면반사경장치조건하적검측결과진행비교。계산표명，실험중가입평면반사경장치이후，원소Cr화Pb적측량결과적상대표준편차여무평면반사경장치시적상비교，분별종5.22%화8.12%강저도료3.43%화3.94%；이원소분석검출한분별유4.13×10-3％화62.54×10-3％강저도2.61×10-3％화44.22×10-3％。가견，이용평면반사경장치능구명현제고격광유도격천광보기술적측량정도。
In order to improve the detection level of laser-induced breakdown spectroscopy on material composition, laser plas-ma was constrained by the plane mirror device in the experiment. The elements calibration curve was measured and drawed ,and the content of element Cr and Pb in the soil samples was quantitatively analyzed by the method of excitating soil plasma emission spec-troum. The soil plasma was induced by Nd:YAG laser. The detection results were compared with that without the plane mirror de-vice. Calculation shows that, when the plane mirror device was added in the experiments, the relative standard deviation of the measurement results of element Cr and Pb from 5.22% and 8.12% decreased to 3.43% and 3.94% than that without mirror; while the detection limits from 4.13 × 10-3% and 62.54 × 10-3% decreased to 2.61 × 10-3% and 44.22 × 10-3%, respectively. It is thus that the plane mirror device can obviously improve the measurement accuracy of laser-induced breakdown spectroscopy.