Levels of Toxic Elements in Tea Brands Commercialized in Egypt Using Optimized Dual-Pulsed Laser-Induced Spectral Analysis Spectrometer.

We report on qualitative and quantitative analyses of the toxic metal content in a series of 13 various commercial tea brands available in Egypt utilizing optimized double-pulse laser ablation spectroscopy (DP-LAS) and inductively coupled plasma-optical emission spectrometry (ICP-OES). The compositional analysis study utilizing the calibration, DP-LAS system, is based on the recorded accumulation spectra of the laser-created plasma plume. The toxic elements like lead, aluminum, and zinc that exist in the tea brands were accurately identified. Our investigation remarkably revealed that the concentration of Pb, Al, and Zn elements in tea brands was higher than the safe permissible limits. We investigated the influence of different parametric dependence studies to enhance our DP-LAS detection sensitivity. The detected spectra of the tea products contain spectral lines of Pb, Al, and Zn. The corresponding emission spectra of the toxic elements were recorded in ICP-OES as a standard analytical technique with their composition concentration. Furthermore, the precision of our DP-LAS data for determining the concentration of micro-toxic elements present in tea samples was validated via ICP-OES technique. The results achieved from DP-LAS technique were in full agreement with ICP-OES results. In addition, the estimated limit of detection of our DP-LAS spectrometer for Pb, Al, and Zn elements was 103.11, 93.19, and 85.47 mg L-1, respectively. The suggested protocols proved the excelle...
Source: Biological Trace Element Research - Category: Biology Authors: Tags: Biol Trace Elem Res Source Type: research