Raman and UV-Vis spectroscopy are critical in semiconductor manufacturing, while NIRS aids in auxiliary detection. Raman spectroscopy monitors wafer crystal quality, detects thin-film thickness and composition (e.g., silicon dioxide and gallium arsenide layers), identifies trace impurities (such as carbon and oxygen), and verifies the integrity of chip packaging materials. UV-Vis spectroscopy verifies photoresist uniformity, analyzes semiconductor optical properties (e.g., band gap energy), and detects surface defects on wafers. NIRS is used to quickly analyze the purity of semiconductor raw materials (e.g., silicon wafers) and monitor moisture content in packaging materials, ensuring stable chip performance.

All three technologies serve environmental protection comprehensively. Raman and NIRS probes enable in-situ, real-time detection of water pollutants (e.g., phenols, hydrocarbons), heavy metal ions, and air harmful gases (e.g., volatile organic compounds, sulfur dioxide); NIRS also analyzes soil moisture, organic matter content, and pesticide residue levels. UV-Vis spectroscopy monitors water quality indicators (e.g., COD, BOD, nitrite content) and soil trace pollutants, while also being used to detect ozone concentration in the atmosphere and heavy metal ions in industrial wastewater, providing strong support for pollution control and early warning.

In laboratories, these technologies are indispensable core tools. Raman spectroscopy is used for molecular structure identification, crystal form analysis, and chemical reaction kinetics tracking; NIRS facilitates rapid quantitative analysis of organic components (e.g., protein, fat, starch) in samples; UV-Vis spectroscopy is widely used for trace substance detection, solution concentration determination, and enzyme activity analysis, aiding research in chemistry, biology, materials science, and environmental science. For teaching, compact UV-Vis and Raman spectrometers demonstrate the principles of light-matter interaction and spectral analysis, while simplified NIRS equipment helps students understand the application of rapid detection technology, enabling intuitive mastery of spectral analysis basics.

NIRS and Raman spectroscopy, equipped with industrial near-field (contact) probes, are widely applied in production lines of petrochemical, food, pharmaceutical, and chemical industries. They realize real-time monitoring of product composition and quality (e.g., oil octane number in petrochemicals, food moisture and additive content, pharmaceutical active ingredient concentration), reducing manual sampling errors and improving production efficiency. UV-Vis spectroscopy is used for on-line monitoring of solution concentration, color index, and impurity content in chemical production, as well as real-time detection of dye concentration in textile printing and dyeing processes, ensuring consistent product quality.

In the pharmaceutical industry, Raman, NIRS, and UV-Vis spectroscopy play important roles in quality control and research. Raman spectroscopy is used for drug crystal form verification (to ensure drug efficacy and stability) and auxiliary detection of cancer cells in medical research, as well as rapid identification of pharmaceutical raw materials and intermediates. NIRS enables real-time monitoring of pharmaceutical formulation uniformity during blending processes and rapid analysis of moisture and active ingredient content in drug granules. UV-Vis spectroscopy is widely applied for drug content determination, purity testing, and detection of harmful impurities in pharmaceutical products, ensuring the safety and effectiveness of drugs.

For cultural heritage protection, the non-destructive characteristics of Raman and NIRS spectroscopy make them ideal tools. Raman spectroscopy is used to analyze the composition of pigments on murals, dyes on ancient textiles, and glazes on porcelain, helping to identify the origin and production techniques of cultural relics. NIRS can detect the fiber type of ancient fabrics, the composition of paper materials, and the degree of aging of cultural relics without damaging the original objects, providing scientific support for the restoration and preservation of cultural relics.

In the metallurgy industry, UV-Vis and Raman spectroscopy are widely used for material detection and quality control. Raman spectroscopy is used to detect oxide layers on metal surfaces, trace impurities in metals (such as sulfur and phosphorus), and the crystal structure of alloys, ensuring the mechanical properties of metal materials. UV-Vis spectroscopy aids in the quantitative analysis of alloy composition, the detection of heavy metal content in smelting wastewater, and the monitoring of impurity levels during metal smelting processes, improving the quality of metallurgical products.

In the cosmetic industry, these three spectroscopy technologies are used to ensure product quality and safety. Raman spectroscopy can detect active ingredients (such as hyaluronic acid and vitamin C) and preservatives in cosmetics, as well as identify counterfeit cosmetic products by analyzing their component differences. NIRS enables rapid analysis of moisture, oil content, and nutrient components in skincare products. UV-Vis spectroscopy is used to detect harmful substances (such as heavy metals and excessive pigments) in cosmetics, protecting consumer health.

In the new energy industry, spectroscopy technologies provide support for material research and product quality monitoring. Raman spectroscopy is mainly used to analyze the structure and purity of battery electrode materials (such as lithium cobalt oxide and graphite), as well as monitor the structural changes of materials during battery charging and discharging. NIRS can quickly detect the moisture content and impurity levels in new energy raw materials (such as silicon materials for solar cells). UV-Vis spectroscopy aids in the analysis of optical properties of solar cell materials, improving the photoelectric conversion efficiency of solar cells.

In agricultural product processing, NIRS and Raman spectroscopy are widely used for rapid quality detection. NIRS enables real-time analysis of nutrient components (such as protein, starch, and fat) in crops (wheat, corn, rice), as well as detection of pesticide residues and mycotoxins in agricultural products. Raman spectroscopy can identify the variety of agricultural products and detect the freshness of fruits and vegetables by analyzing their molecular structure changes, ensuring the quality and safety of agricultural products entering the market.