Chemical composition tests are analytical methods used to determine the specific substances and their quantities within a material. These tests can identify elements, compounds, and mixtures, providing essential information for various applications, including quality control, material science, and environmental analysis. Common techniques for conducting chemical composition tests include mass spectrometry, chromatography, and X-ray fluorescence. Each method has its advantages and is chosen based on the type of sample and the information required. Accurate results from these tests are crucial for industries such as pharmaceuticals, food safety, and manufacturing.