ResourceSpectroscopy
V and NIR Spectra of Commercial Mineral Water Samples and Quantitation of Mineral Water Sample Mixtures by Multiple Linear Regression
23 Mar 2011In this application note it is demonstrated that multiple regression analysis using absorbance values at multiple wavelengths can be successfully used to perform simultaneous quantitation of multiple sample constituents. Mineral water, consisting of raw water from naturally occurring springs or sources, is now available under many commercial labels. The mineral content in these different brands of water not surprisingly differs depending on their source. Here we investigated these mineral content differences using absorption spectra obtained from measurement of using an ultraviolet, near infrared spectrophotometer.
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UV-Visible SpectroscopyUltraviolet-visible (UV-Vis) spectrophotometers are used to measure the interaction of UV and visible light with a sample, including transmission, reflectance & absorbance. The two major instrument classes are single-beam or double-beam spectrophotometers. More specialized equipment includes colorimeters, spectroradiometers and refractometers. Portable and microvolume spectrophotometers are also available. For the modular spectroscopy lab, explore a range of light sources for combination with a spectrograph/spectrometer and optics. Find the best UV-Vis spectroscopy products in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Environmental Monitoring and TestingEnvironmental monitoring and testing uses handheld portable analyzers, kits, spectrometers or chromatography systems for air, water, soil, food and other sample testing. Useful features of analyzers such as BOD and COD include portability, easy calibration, automation and sensitivity. Environmental test kits for pH, water, moisture, etc, should be accurate, sensitive, reliable, fast and easy to use.