Indium standard is primarily used in analytical chemistry for calibration and quality control purposes. It serves as a reference material in techniques like atomic absorption spectroscopy (AAS) and inductively coupled plasma mass spectrometry (ICP-MS) to ensure accurate measurement of indium concentrations in various samples. This is particularly important in industries such as electronics, where indium is a critical component in the production of semiconductors, LCD screens, and solar panels. Additionally, it is employed in environmental testing to detect and quantify indium levels in water, soil, and air, ensuring compliance with safety and regulatory standards. Its precise and reliable nature makes it an essential tool for maintaining consistency and accuracy in analytical processes.