Department of Physics, University of Allahabad 211002, India.
Department of Physics, C.M.P. College, University of Allahabad, Prayagraj, 211002, India.
Methods Appl Fluoresc. 2022 Mar 25;10(3). doi: 10.1088/2050-6120/ac5e11.
Laser-Induced Breakdown Spectroscopy (LIBS) is an analytical technique used to identify and quantify the elements present in any type of material present in any phase (solid, liquid, gas, and aerosol). In the present work, our objective is to find the presence of toxic and other elements in chewing tobacco () using LIBS. Spectral signatures of elements like C, Fe, Si, Mg, Mn, Ca, Ti, Na, H, N, K, O, along with some toxic elements Al, Sr, Li, Cu, Sb, and Cr are observed in the LIBS spectra of these tobacco samples. The spectral intensity ratio is measured for quantitative analysis of elements present in the samples. Further, Atomic Absorption Spectroscopy is used for determining absolute concentration in these samples. A relation between the AAS result and the relative intensity of spectral lines measured in the LIBS is obtained using regression analysis. The multivariate technique, Principal Component Analysis (PCA), discriminates all the samples based on their toxicity and other constituents. Molecular study (Photoacoustic spectroscopy (PAS), UV-Visible (UV-vis), and FT-IR) of tobacco samples were performed to analyze the molecules present in the tobacco samples.
激光诱导击穿光谱（LIBS）是一种分析技术，用于识别和定量任何类型的材料（固体、液体、气体和气溶胶）中存在的元素。在本工作中，我们的目的是使用 LIBS 检测咀嚼烟草中是否存在有毒和其他元素。在这些烟草样品的 LIBS 光谱中观察到 C、Fe、Si、Mg、Mn、Ca、Ti、Na、H、N、K、O 等元素的光谱特征，以及一些有毒元素 Al、Sr、Li、Cu、Sb 和 Cr。通过测量光谱强度比来定量分析样品中存在的元素。此外，原子吸收光谱法用于测定这些样品中的绝对浓度。使用回归分析获得 AAS 结果与 LIBS 中测量的谱线相对强度之间的关系。多元技术，主成分分析（PCA），根据毒性和其他成分对所有样品进行区分。对烟草样品进行分子研究（光声光谱法（PAS）、紫外可见（UV-vis）和傅里叶变换红外（FT-IR）），以分析烟草样品中存在的分子。
