The method describes how to determine the manganese content of water photometrically with a cuvette test.
Manganese(II) ions react in an ammonia solution with formaldoxime, forming a reddish-colored complex.
The method describes how to determine the manganese content of water through oxidation to permanganate.
Manganese ions are catalytically oxidized into purple-colored permanganate ions. The purple color of the solution is determined using a comparator (or photometrically):
Mn2+ + 12 H2O → MnO4- + 8 H3O+ + 5 e-
The method describes how to determine the manganese content of water by atomic emission spectrometry.
Refer to W-000.17.210 Calcium in Water, Determination Using Atomic Emission Spectrometry (ICP-AES) (Principle)
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.