The quality and safety of water can be determined using spectroscopic and techniques. Using components of interest (such iron and manganese) or by reacting the compound of interest with another compound to produce a color shift, a colorimeter assesses the intensity of a color.
It is typical to put the solution in a cuvette before reading a sample with a colorimeter. These are tiny, rectangular, often plastic containers that fit into the colorimeter's top slot. The spectrophotometer's cuvette should only contain distilled water when calibrating the device. So, distilled water is employed as a blank to exclude the absorbance of substances other than the analyte being measured. The method known as colorimetric analysis compares the color variations of the solution to estimate the concentration of analyte.
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