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The Importance of UV-Vis Testing
UV-Vis testing (short for Ultraviolet-visible spectroscopy) is a method used to quantify organic compounds and those of inorganic metals by their absorbance or reflectance at specific wavelengths of light. We often analyze for organic compounds such as formaldehyde in fabrics, polymers, and wood (AATCC 112, EN ISO 14184-1, ASTM D5582). The inorganic analysis includes hexavalent chromium in metal plating and plating solutions (IEC 62321).
UV-Vis analysis is a measurement of color intensity in a solution. Various compounds and elements will react with reagents/chemicals to develop a color in solution that can be measured at a specific wavelength. Generally, the color intensity is proportional to concentration and this concentration can be precisely determined against a set of carefully prepared standard solutions treated with the same chemicals.
Some common substances measured in our laboratories by UV-Vis are formaldehyde and hexavalent chromium.
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