Rapid detection of metal elements in fruits is an important factor in evaluating the effect of pollution on agriculture. Quantitative analysis of metals Cu, Ni, Ti, Sr, Ba, Cr in drying orange peel and orange flesh by laser - induced breakdown spectroscopy (LIBS) was applied. The orange peel and orange flesh were ablated by a 1 064 nm Nd; YAG pulsed laser at the same conditions. The spectra were identified by a multi channel fiber spectrometer. The relative intensities of Cu, Ni, Ti, Sr, Ba, Cr were compared and analyzed by statistical methods. The results showed a higher relative content of Ti and a little higher relative content of Ba in orange flesh than in orange peel. And the relative content of the four metals Sr, Cu, Ni and Cr, were high er in orange peel. The experimental results also showed that LIBS technique is a rapid and effective means for detecting the contents of metals in fruits.%为了探讨水果中金属元素的实时快速检测方法,运用激光诱导击穿光谱(LIBS)技术对烘干的脐橙橙皮和橙肉中的金属元素Cu、Ni、Ti、Sr、Ba、Cr进行定量分析.采用1 064 nm的Nd:YAG调Q脉冲激光发生器,在同等条件下烧灼脐橙橙皮和橙肉,利用八通道光纤光谱仪对特定波长范围的光谱波段进行鉴别分析,比较烘干橙皮和橙肉中Cu、Ni、Ti、Sr、Ba、Cr金属元素特征谱线的相对强度值.结果表明,橙肉中的Ti元素含量明显高于橙皮中,橙肉中的Ba元素含量稍高于橙皮中,而橙皮中的Sr、Cu、Ni和Cr元素含量均高于橙肉中.结果还表明运用LIBS技术可以快速实时检测水果样品中的金属元素含量.
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