Mi490 | Peroxide Photometer

Mi490 is a user-friendly photometer for monitoring peroxide 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 peroxide value, which measures the degree to which the oil is oxidized. Rancidification is the decomposition of fats and other lipids by hydrolysis and/or oxidation. Hydrolysis will split fatty acid chains away from the glycerol backbone in glycerides. These free fatty acids can then undergo further auto-oxidation. Oxidation primarily occurs with unsaturated fats by a free radical-mediated process.

One of the most widely used tests for oxidative rancidity, peroxide value is a measure of the concentration of peroxides and hydroperoxides formed in the initial stages of lipid oxidation. Milliequivalents of peroxide per kg of fat are measured by titration with iodide ion.
Peroxide values are not static and care must be taken in handling and testing samples. It is difficult to provide a specific guideline relating peroxide value to rancidity. High peroxide values are a definite indication of a rancid fat, but moderate values may be the result of depletion of peroxides after reaching high concentrations.

• Fast easy to read results with large digital LCD readout.
• Accurate to ±0.5 meq O2 / kg and a range 0.0 to 25.0 meq O2 / kg.
• Lightweight, ergonomic and portable.
• Easy measurement: just mix the oil in the vial sample, gently shake, insert the cuvette, zero the meter then mix the reagents and read.
• Simple easy reagent vials.
• Easy 1-2-3 instruction steps.
• Auto shut off after 15 minutes of non-use, 4 x 1.5 volt AA bateries (batteries included).
• Adaptation of the CE n. 2568/97 Method.