激光诱导击穿光谱法：一种用于鉴定和定量葫芦种子中矿物质的快速工具。
Laser Induced breakdown spectroscopy: A rapid tool for the identification and quantification of minerals in cucurbit seeds.
作者信息
Singh Jyotsana, Kumar Rohit, Awasthi Shikha, Singh Vinti, Rai A K
机构信息
Centre of Food Technology, University of Allahabad, Allahabad 211002, India.
Laser Spectroscopy Research Laboratory, Department of Physics, University of Allahabad, Allahabad 211002, India.
出版信息
Food Chem. 2017 Apr 15;221:1778-1783. doi: 10.1016/j.foodchem.2016.10.104. Epub 2016 Oct 24.
Laser-induced breakdown spectroscopy (LIBS) was investigated to estimate the viability as a simple and rapid method for analysis of nutrient elements in seed kernels of cucurbits. LIBS spectra were recorded in the range of 200-975nm by using Q-switched Nd:YAG laser at 532nm (4ns, 10Hz) attached to echelle spectrometer with intensified charged coupled device (ICCD). The spectral analysis revealed the presence of several elements like C, O, N, Mg, Ca, Na and K in seeds. The quantification of elements (Mg, Ca, Na and K) through LIBS was done using calibration curve method in which all calibration curve shows good linearity (r>0.95). The result obtained through LIBS was in reasonable agreement with that obtained through atomic absorption spectroscopy (AAS). Principal Component Analysis (PCA) was also applied to the LIBS data for rapid categorization of seed samples belonging to same species although samples have similar nutrient elements.
研究了激光诱导击穿光谱法（LIBS），以评估其作为一种简单快速的方法来分析葫芦科种子中营养元素的可行性。使用波长为532nm（4ns，10Hz）的调Q Nd:YAG激光器连接带有增强型电荷耦合器件（ICCD）的阶梯光栅光谱仪，在200 - 975nm范围内记录LIBS光谱。光谱分析表明种子中存在碳、氧、氮、镁、钙、钠和钾等多种元素。通过LIBS对元素（镁、钙、钠和钾）进行定量分析采用校准曲线法，所有校准曲线均显示出良好的线性关系（r>0.95）。通过LIBS获得的结果与通过原子吸收光谱法（AAS）获得的结果合理一致。主成分分析（PCA）也应用于LIBS数据，以便对属于同一物种的种子样品进行快速分类，尽管样品具有相似的营养元素。
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