Quantification of Milk Fat in Chocolate Fats by Triacylglycerol Analysis Using Gas−Liquid Chromatography

2007 ◽  
Vol 55 (9) ◽  
pp. 3275-3283 ◽  
Author(s):  
Manuela Buchgraber ◽  
Simona Androni ◽  
Elke Anklam
Keyword(s):  
Liquid Chromatography ◽  
Milk Fat ◽  
Gas Liquid Chromatography ◽  
Triacylglycerol Analysis

Detection and quantification of non-milk fat in mixtures of milk and non-milk fats

1980 ◽  
Vol 47 (3) ◽  
pp. 295-303 ◽  
Author(s):  
Ralph E. Timms
Keyword(s):  
Liquid Chromatography ◽  
Vegetable Oil ◽  
Milk Fat ◽  
Triglyceride Composition ◽  
Gas Liquid Chromatography ◽  
Confidence Limits ◽  
Pure Milk ◽  
Image Position ◽  
Detection And Quantification ◽  
Better Than

SUMMARYThe triglyceride compositions of 76 Australian milk fats obtained from 3 factories during a whole year were determined by gas-liquid chromatography. It was shown that all the data fitted the equationwith a S.D. of of 0·7088 where C40, C42 and C44 are the weight percentages of triglycerides with carbon numbers 40, 42 and 44. The triglyceride compositions of 10 samples of milk fat from countries other than Australia were also shown to fit the equation. If the equation is assumed to define pure milk fat, it is shown that as little as 5% of any non-milk fats can be detected with > 99% confidence. The amount of non-milk fat in mixtures of milk and non-milk fats can be quantified to better than ±2% with > 95% confidence. Also, the identity of the non-milk fat can usually be deduced by calculation of its triglyceride composition. Analyses of known mixtures and of chocolate and a table spread comprising butter and vegetable oil showed an agreement between observed and expected results well within the predicted confidence limits.

Fatty acid composition of sow's colostrum, milk and body fat as determined by gas-liquid chromatography

1963 ◽  
Vol 30 (3) ◽  
pp. 339-343 ◽  
Author(s):  
J. M. deMan ◽  
J. P. Bowland
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Liquid Chromatography ◽  
Fatty Acid ◽  
Acid Composition ◽  
Milk Fat ◽  
Gas Liquid Chromatography ◽  
Nutrient Requirements ◽  
Total Fatty Acids ◽  
The Mean

SummaryAs determined by gas-liquid chromatography, the mean fatty acid composition (weight percentages of total fatty acids) of milk fat from sows fed a diet to meet U.S. N.R.C. nutrient requirements was: oleic, 35·3; palmitic, 30·3; linoleic, 13·0; palmitoleic, 9·9; stearic, 4·0; myristic, 3·3; linolenic, 2·5; unidentified 0·7 and 0·5, presumably n-odd chain and branched fatty acids; lauric, 0·3; and capric, 0·2. The corresponding fatty acid composition of colostrum fat was: oleic, 41·7; palmitic, 22·5; linoleic, 20·9; palmitoleic, 5·0; stearic, 5·7; myristic, 1·4; linolenic, 2·4; and unidentified acids, 0·3 and 0·1. Dietary fat increased fat levels in the milk and influenced fatty acid composition of the milk fat. Backfat resembled colostrum fat more than milk fat.

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