Milwaukee Instruments - MI490 - Peroxide Value Photometer

ITEM #: 13092060
Mi490 is a user-friendly photometer for monitoring pero x ide value in the process of oil making. This instrument will give you direct readings, with a range of 0.0 to 25.0 meq O2/Kg.
The measurement of the oil's chemical degradation is the pero x ide value, which measures the degree to which the oil is o x idized. Rancidification is the decomposition of fats and other lipids by hydrolysis and/or o x idation. Hydrolysis will split fatty acid chains away from the glycerol backbone in glycerides. These free fatty acids can then undergo further auto-o x idation. O x idation primarily occurs with unsaturated fats by a free radical-mediated process.
One of the most widely used tests for o x idative rancidity, pero x ide value is a measure of the concentration of pero x ides and hydropero x ides formed in the initial stages of lipid o x idation. Milliequivalents of pero x ide per kg of fat are measured by titration with iodide ion.
Pero x ide values are not static and care must be taken in handling and testing samples. It is difficult to provide a specific guideline relating pero x ide value to rancidity. High pero x ide values are a definite indication of a rancid fat, but moderate values may be the result of depletion of pero x ides after reaching high concentrations.
Mi490 is supplied complete with: reagents for 20 tests, 4 x 1 mL syringe, tissue for wiping cuvets, 4 x 1.5V AA batteries and instruction manual.
Peroxide Value Photometer
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