对具有不同碳元素存在形态的4种化学纯试剂(无水对氨基苯磺酸、可溶性淀粉、石墨和碳酸钙)进行激光诱导击穿光谱实验。选用实验中探测到的碳元素原子谱线CI 247.856 nm作为分析线,研究了不同存在形态碳元素的激光诱导击穿特性。从物质的化学构成、分子内部原子结合的作用力大小等方面,说明了不同形态碳元素的光谱特性存在差异的原因。实验结果表明:存在于结构复杂、化学键能较大的物质中的碳元素,被激发所需的激光能量也较大。

Four different power samples,sulfanilic acid anhydrous,soluble starch,graphite and calcium carbonate,with different content of carbon were used to determine the influence of element speciation on the properties of laser-induced spectroscopy. The srectral line of CI 247.856 nm was chosen to analye the excitation properties of laser-induced plasma of different carbon speciations. The chemical compositions,molecular binding forces of materials on were used to account for the differences of spectral properties among different forms of carbons. The results show that the excitation energy of carbon in compound with complex structure and greater chemical bond energy requires relatively more energy.