Optical Filters in Water Analysis
Every year, the Earth’s population consumes 4 trillion cubic meters of fresh water. After being carefully treated to fulfill the water-quality standards established by local governments, this drinking water is delivered through water delivery systems (WDS). These water delivery systems are susceptible to contaminants, corrosion, pollution and even sabotage. With the demand to identify the enormous number of contaminants with a broader spectrum coverage, a spectral analysis strategy has been extensively applied in which the information contained in the optical properties of the ultraviolet (UV) and visible (Vis) spectrum is used to the highest extent. Optical bandpass filters with a center wavelength at 254nm, 280nm, 350nm or 580nm are commonly used in a single or a double wavelength optical system for water quality analysis; yielding rich spectral information.