Compositional study of gallbladder stone using photoacoustic spectroscopy

Gazali, Zainab; Thakur, Surya N.; Rai, A.K.

doi:10.1016/j.optlastec.2018.09.003

Cited by 13 publications

(2 citation statements)

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“…For PAS analysis, 0.5 gm of grounded tobacco sample has been used to record the PA spectra in the wavelength range 260-850 nm. The used PAS experimental set-up for molecular analysis of tobacco is described in detail in the literature [17].…”

Section: Methodsmentioning

confidence: 99%

“…The absorption peaks of organic molecules in UV-vis absorption and PA spectra confirm the presence of organic elements such as H, C, N, and O as observed in LIBS spectra of tobacco samples. A minimal variation in UV-vis absorption peaks with the peaks in PA spectra is due to the involvement of different mechanisms in these two different techniques [17].…”

Section: Molecular Analysis 331 Uv-vis and Pas Studymentioning

confidence: 99%

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Analysis of constituents present in smokeless tobacco (Nicotiana tabacum) using spectroscopic techniques

Mishra

Kumar

Dwivedi

et al. 2022

Methods Appl. Fluoresc.

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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 (Nicotiana tabacum) 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.

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Section: Methodsmentioning

confidence: 99%

Section: Molecular Analysis 331 Uv-vis and Pas Studymentioning

confidence: 99%