Trace Element Analysis (TEA) refers to a group of analytical techniques used to detect and quantify small amounts of chemical elements across various sample types. Most elements from the periodic table can be determined using these methods. Common techniques include Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES), Inductively Coupled Plasma Mass Spectrometry (ICP-MS), Total Organic Halogen (TOX), Total Organic Carbon (TOC), Total Nitrogen (TN), and Atomic Absorption Spectrometry (AAS). Additionally, techniques for analyzing Carbon, Hydrogen, Nitrogen, Sulfur, and Oxygen (CHNS or CHNOS) are often employed. TEA is particularly valuable in fields such as environmental analysis, metallurgy, food and beverage testing, and the pharmaceutical industry, where precise quantification of trace elements is crucial for quality control, safety assessments, and regulatory compliance.