What is P-anisidine used for?
P-anisidine is a substituted aniline that is aniline in which the hydrogen para to the amino group has been replaced by a methoxy group. It is used as a reagent for the detection of oxidation products such as aldehydes and ketones in fats and oils. It has a role as a reagent and a genotoxin.
What is P-anisidine test?
Anisidine value test is used to assess the secondary oxidation of oil or fat, which is mainly imputable to aldehydes and ketones, and is therefore able to tell the oxidation “history” of an oil or a fat.
What is the relation of aldehyde and ketones with para anisidine?
p-Anisidine condenses readily with aldehydes and ketones to form Schiff bases, which absorb at 350 nm. This colorimetric reaction is used to test for the presence of oxidation products in fats and oils, an official method for detecting them by the American Oil Chemists’ Society.
What is the most serious hazard posed by the P-anisidine?
* p-Anisidine can affect you when breathed in and by passing through your skin. * p-Anisidine can irritate the skin and eyes causing a rash or burning feeling on contact. * Breathing p-Anisidine can irritate the nose, throat and lungs causing coughing, wheezing and/or shortness of breath.
What does high anisidine value mean?
Anisidine value (AV)
These are what gives the oil a rancid smell, and they are measured by the AV. The lower the AV, the better the quality of the oil.
What does anisidine value measure?
The anisidine value (AV) in oils and fats is a measure of the aldehydes present and therefore the level of secondary oxidation that has occurred and, like the PV, is used as an indicator of quality.
What is P-anisidine value?
The p-anisidine value is defined as the absorbance of a solution resulting from the reaction of 1g fat in isooctane solution (100 ml) with p-anisidine (0.25% in glacial acetic acid).
What anisidine value indicates rancidity?
These are what gives the oil a rancid smell, and they are measured by the AV. The lower the AV, the better the quality of the oil. Most customers will require an AV of less than 30 in marine oils but AV may need to be as low as 10, depending on the market.
How is anisidine value calculated?
To determine AV, a solution of the oil or fat in iso-octane is reacted with p-anisidine in glacial acetic acid to form yellowish reaction products. The AV is then determined from the absorbance measured at 350 nm, both before and after reaction.
What is P anisidine value?
How does anisidine value aid in the determination of samples quality and identity?
P-Anisidine Value analysis allows to control the quality, the smell and the state of conservation of the matter detecting the deeper stages of the oxidation. The lower the p-Anisidine Value, the better the quality of fats and oils analyzed.