Testing methods for chemical products
Jan 12, 2026
High-Performance Liquid Chromatography (HPLC): HPLC is an important branch of chromatographic analysis. It uses a liquid mobile phase and a high-pressure liquid delivery system to pump a single solvent or a mixture of solvents with different polarities into a chromatographic column containing a stationary phase. The components are separated within the column and then detected by a detector. HPLC is widely used in the separation and determination of active ingredients in health foods, nutritional fortifiers, vitamins, and proteins.
Ultraviolet Absorption Spectrophotometry (UV): UV detection is mainly used for the determination of complex composition and stability constants. It works by measuring the absorption of ultraviolet electromagnetic waves by certain valence electrons in molecules, causing a transition from a low energy level to a high energy level, thus producing a spectrum. UV detection is widely used in material testing, material analysis, and formula reconstruction in the chemical industry.
Gas Chromatography (GC): Gas chromatography separates the sample into different compounds and analyzes them in a gas chromatograph. It is suitable for the quantitative and qualitative analysis of various volatile compounds.
Infrared Spectroscopy (IR): Infrared spectroscopy detects samples based on the vibrational modes of molecules, providing information about the composition and structure of molecules in the sample. It is commonly used for the systematic analysis of fine chemicals.
Mass Spectrometry (MS): Mass spectrometry ionizes the compounds in the sample and detects them in a mass spectrometer, providing information about the molecular weight and structure of the compounds in the sample.
Chemical Analysis Methods: Based on specific chemical reactions and relationships, these methods can accurately detect various chemical materials and provide reliable information and data for chemical production.
Elemental Analyzer: Using high-temperature combustion thermal conductivity analysis, it can quickly determine the content of carbon, hydrogen, nitrogen, sulfur, and oxygen in a sample.
Non-destructive Testing Methods: Such as radiographic testing (RT), ultrasonic testing (UT), magnetic particle testing (MT), and penetrant testing (PT), these methods are mainly used to detect internal defects in materials.
Light scattering method: including white light and laser, used for morphological observation and compositional analysis of materials.
Thermogravimetric analysis: used to study the mass change of materials during heating, often used to analyze the thermal stability and decomposition characteristics of materials.
