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 C₂ 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.

对各种茶叶中存在的营养补充剂和掺假/有毒元素进行了定性和定量分析并进行了比较。使用茶叶的激光诱导击穿 (LIB) 光谱快速鉴定无机元素（即 Ca、K、Na、Mg、Ba、Al、Sr、Mn）和有机元素（C、N、O、H） . 还确定了金属氧化物（CaO、BaO、SrO 和 Al2O）的电子能带。_{CN和C 2}的分子带LIB 光谱中的分子显示茶样品中存在有机化合物。使用无校准 (CF-LIBS) 技术确定了茶样品成分的浓度，并将结果与​​通过能量色散 X 射线 (EDX) 技术获得的结果进行了进一步比较。根据每个样品中 Ba、Al 和 Sr 的含量，讨论了各种茶叶的毒性。Na、K、Mg的定量分析可能有助于控制高血压和慢性肾脏病。主成分分析 (PCA) 根据元素成分对不同样品进行分类。在所有茶叶样品中，氨基酸、酶、色素、碳水化合物、咖啡因和尼古丁的存在已通过光声光谱 (PAS) 确定。更远，