This method describes how to determine the ozone content of water using iodometric titration.
Ozone oxidizes iodide to iodine, which forms a clathrate compound that exhibits a blue color and which loses its color through titration with a sodium thiosulfate solution. The ozone concentration is determined on the basis of the quantity of sodium thiosulfate solution consumed in the reaction.
The method describes how to determine the ozone content of water photometrically with a cuvette test.
Ozone causes the color of indigo trisulfonate to disappear in a stoichiometric reaction. The decrease in absorbance is measured at a wavelength of 600 nm.
This method describes how the protein content in adjuncts is determined.
This method describes how the protein content in adjuncts is determined.
Prior to storage, the moisture content of barley must be determined.
The electrical capacitance of a whole, unground grain sample is measured. The apparatus contains three sensors:
Capacitance
The moisture present in a sample absorbs the electrical energy between the walls of the sample container. The electrical signal or the “capacity” increases with higher moisture contents of the sample and with larger sample sizes.
Oscillating weight balance
The oscillating weight balance measures the frequency to determine the mass.
Temperature correction
The capacitance of the sample rises with the temperature. A Thermistor temperature sensor is built into the sample container. The microprocessor automatically corrects for the moisture content.