Laser-induced breakdown spectroscopy-based quantitative elemental analysis of nutritional and hazardous elements in Solanum nigrum

• Recent developments in metal-air batteries, whether in aqueous or non-aqueous forms, are setting the stage for advanced-energy-density storage solutions. • Non-aqueous lithium-air batteries encounter considerable issues, such as the instability of electrolytes and the deterioration of cathodes, necessitating solutions for their effective application. • Porous carbon-based air cathodes are essential for improving oxygen diffusion and discharge capacity in metal-air batteries, making an area of focus for enhancement efforts. • Advancements in electrolytes and separators play a crucial role in enhancing the safety, ionic conductivity, and chemical stability of metal-air batteries. • Future studies should concentrate on optimizing materials, addressing hybrid systems, and tackling scaling issues to fully realize the potential of metal-air batteries for use in commercial. Medicinal plants play a vital role for the preparation of recently advanced drugs as reservoir of antioxidants and other necessary elements. Therefore, investigating the distinct biodynamic elements of medicinal plants and their evaluation is very important. In this study, laser-induced breakdown spectroscopy was employed for both qualitative and quantitative investigation of different parts of medicinal plant Solanum nigrum and the surrounding soil. Optical emission spectra of soil and different fragments of plant collected from city and village revealed the spectral lines of many nutritional metals including Ca, Mg, Na, K and Fe which are significant for human health, present in relatively large abundance. Moreover, the presence of trace level of a few poisonous substances such as Li, Al, Ba, Si, Ti and Sr in various parts of the plant were found but their concentration was found below the toxic limit of WHO. The authenticity of the qualitative and quantitative detection of the elements in various portions of Solanum nigrum samples by LIBS was endorsed by employing inductively coupled plasma optical emission spectroscopy and its outcomes displayed good agreement with the LIBS data.