Investigation and Comparison of Nutritional Supplements (Elements and Compounds) in Various Tea Leaves using Spectroscopic Techniques

Qualitative and quantitative analyses of nutritional supplements and adulteration/toxic elements present in various tea leaves have been performed and compared. Rapid identification of inorganic (i.e., Ca, K, Na, Mg, Ba, Al, Sr, Mn) and organic (C, N, O, H) elements have been done using laser-induce...

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Veröffentlicht in:Proceedings of the National Academy of Sciences, India, Section A, physical sciences India, Section A, physical sciences, 2023-06, Vol.93 (2), p.413-422
Hauptverfasser: Kumar, Tejmani, Rai, Abhishek Kumar, Dwivedi, Abhishek, Kumar, Rohit, Rai, Awadhesh Kumar
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container_title Proceedings of the National Academy of Sciences, India, Section A, physical sciences
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creator Kumar, Tejmani
Rai, Abhishek Kumar
Dwivedi, Abhishek
Kumar, Rohit
Rai, Awadhesh Kumar
description Qualitative and quantitative analyses of nutritional supplements and adulteration/toxic elements present in various tea leaves have been performed and compared. Rapid identification of inorganic (i.e., Ca, K, Na, Mg, Ba, Al, Sr, Mn) and organic (C, N, O, H) elements have been done using laser-induced breakdown (LIB) spectra of tea leaves. The electronic bands of the metal oxides (CaO, BaO, SrO, and AlO) are also identified. Molecular bands of CN and C 2 molecules in the LIB spectra show the presence of organic compounds in the tea samples. The concentration of the constituents of the tea samples has been determined using the calibration free (CF-LIBS) technique and results are further compared with results obtained by energy-dispersive X-ray (EDX) technique. The toxicity of the various tea leaves has been discussed based on the contents of Ba, Al, and Sr in each sample. The quantitative analysis of Na, K, and Mg may be helpful to control hypertension and chronic kidney disease. Principal component analysis (PCA) classifies the different samples based on their elemental constituents. In all tea leaves samples, the presence of amino acids, enzymes, pigments, carbohydrates, caffeine and nicotine has been established via photoacoustic spectroscopy (PAS). Further, the confirmation of the molecular bands of the tea leaves is done with (Fourier Transform Infrared) FTIR spectroscopic technique.
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subjects Aluminum
Amino acids
Applied and Technical Physics
Atomic
Barium oxides
Caffeine
Carbohydrates
Constituents
Dietary supplements
Fourier transforms
Hypertension
Infrared spectroscopy
Kidney diseases
Laser induced breakdown
Magnesium
Manganese
Metal oxides
Molecular
Optical and Plasma Physics
Organic compounds
Photoacoustic spectroscopy
Physics
Physics and Astronomy
Pigments
Principal components analysis
Qualitative analysis
Quantitative analysis
Quantum Physics
Research Article
Spectra
Spectrum analysis
Strontium
Toxicity
title Investigation and Comparison of Nutritional Supplements (Elements and Compounds) in Various Tea Leaves using Spectroscopic Techniques
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