W-000.04.732 [2021-03] Clarity (Turbidity) of Water, Determination with Optical Turbidity Measuring Devices

Application/Purpose

This method describes how to determine the clarity or turbidity of water using a turbidimeter.

Scope of Application

Water intended for use as an ingredient in the production of beer (brewing liquor) or other foods

Principle

A water sample containing undissolved substances diminishes the incident light radiation and scatters it unevenly in all directions. The intensity of the scattered radiation depends on the wavelength of the incident light, on the measurement angle and on the form and size of the suspended particles. The results of the turbidimetric analysis are related to a “standard formazin turbidity”.

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