V and NIR Spectra of Commercial Mineral Water Samples and Quantitation of Mineral Water Sample Mixtures by Multiple Linear Regression

In 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.