Detection of heavy metal elements by using advanced optical techniques

The presence of heavy metals in the environment presents a significant concern, as it poses a substantial threat to both human health and food safety. Accurate measurement and identification of heavy metals in diverse sample types, encompassing water, soil, food, and biological materials, necessitate utilizing various spectroscopic techniques. In this comprehensive review, a meticulous examination of three prevalent methodologies employed for heavy metal analysis in soil is undertaken: Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES), Laser-Induced Breakdown Spectroscopy (LIBS), and Atomic Absorption Spectroscopy (AAS). An elaborate exposition of the operational principles underlying each method is provided, their respective strengths and limitations are delineated, and the specific contexts in which they find application are elucidated. Furthermore, recent developments and forthcoming prospects associated with each of these techniques are elucidated, underscoring the potential advantages of their combined use alongside other analytical modalities to augment precision and speed in heavy metal analysis. The analysis emphasizes that (ICP-OES), LIBS, and AAS offer distinct capabilities and restrictions within the domain of heavy metal detection. Selecting the most appropriate technique hinges on the prerequisites and situational aspects characterizing each analytical challenge. This review furnishes a holistic comprehension of these analytical methodologies, underscoring their pivotal role in addressing the pressing issue of heavy metal contamination and providing valuable insights for optimizing the selection and application of these techniques in environmental and food safety assessments.