1. Inversely proportional: If a fat has low saponification value, chain
length of the fatty acid will be long.
Sap value= mg of KOH/ NaOH required to break ALL the TG in the oil.
The TG gets break into the Sodium Salts of FA (while unreacted NaOH is calculated by neutralizing with HCl).
So basically, the value is just a measurement of the ml of NaOH / KOH.
Triglycerides with long fatty acids have more mass. Also, the long chain fatty acids have a relatively fewer number of carboxylic functional groups per unit mass of the fat and therefore high molecular weight. As the mass increases, the saponification number decreases (an inverse relationship). So a given mass of a triglyceride will have a larger number of moles at low molecular weight than high, and accordingly consume a larger number of moles KOH.
2. Sap Value = {(3*56.1*1000) / ([Mean MW * 3] + 92.09 - 54)}
Note: The calculated sap value is not applicatble to fats and oils containing high amount of unap matter, FFA's (>0.1%), or mono- and di-glycerides (>0.1%)
3. Approximate Average MW OR Saponification equivalent
Dividing 56100 by the saponification value an approximate measure of the average molecular weight of the acyl chain can be found (this is known as the saponification equivalent). [D]
ONLINE AVG MW CALCULATOR
http://www.webpages.uidaho.
MANUAL AVG CALCULATION
http://tech.groups.yahoo.com/
http://lib3.dss.go.th/
Sap value= mg of KOH/ NaOH required to break ALL the TG in the oil.
The TG gets break into the Sodium Salts of FA (while unreacted NaOH is calculated by neutralizing with HCl).
So basically, the value is just a measurement of the ml of NaOH / KOH.
Triglycerides with long fatty acids have more mass. Also, the long chain fatty acids have a relatively fewer number of carboxylic functional groups per unit mass of the fat and therefore high molecular weight. As the mass increases, the saponification number decreases (an inverse relationship). So a given mass of a triglyceride will have a larger number of moles at low molecular weight than high, and accordingly consume a larger number of moles KOH.
2. Sap Value = {(3*56.1*1000) / ([Mean MW * 3] + 92.09 - 54)}
Note: The calculated sap value is not applicatble to fats and oils containing high amount of unap matter, FFA's (>0.1%), or mono- and di-glycerides (>0.1%)
3. Approximate Average MW OR Saponification equivalent
Dividing 56100 by the saponification value an approximate measure of the average molecular weight of the acyl chain can be found (this is known as the saponification equivalent). [D]
ONLINE AVG MW CALCULATOR
http://www.webpages.uidaho.
MANUAL AVG CALCULATION
http://tech.groups.yahoo.com/
http://lib3.dss.go.th/
Nice information about saponification. I like it. Thanks for sharing this information. Cloth Washing Products
ReplyDeleteDividing 56100 by the saponification value an approximate measure of the average molecular weight of the acyl chain can be found (this is known as the saponification equivalent). [D]misc
ReplyDeleteThankyou very much, very useful information.
ReplyDeletePlease share the mathematical relationship among Total aacid Number and Saponification number
Hi everyone,
ReplyDeleteCan anyone tell me when we calculating the saponification value of any fatty acid, why we divided by 1000 (KOH) and 1402 (NAOH) for sap. value
Please how can i calculate the molar mass of. TAG given that the saponification value is 190 thanks
ReplyDeletefuck you weirdo.
ReplyDeletecan anyone suggest the method for calculating molecular weight without any instrumentation ?
ReplyDeleteExcellent blog . Excellent information about oils and saponification. A very useful oil used might be soybean oil or castor oil to test. One other source we have found for soybean oils and castor oil as well as the PEG Castor oil and other commercial surfactants is a US based website is www.level7chemical.com
ReplyDelete