Issue 1134, 1970

The rapid determination of fat in cocoa products by using a differential density technique

Abstract

The rapid determination of fat for process control purposes in cocoa powders, extrusion cakes and chocolate liquors has been accomplished by rapid extraction of the fat with tetrachloroethylene, followed by indirect determination of the density of the resulting solution by using a differential density technique. The difference in apparent weight loss, which is indicated by an aperiodic balance, between a plummet immersed in the fat solution and an identical plummet immersed in pure tetrachloroethylene is correlated with the fat content of the sample. The correction factor associated with batch-to-batch variations of solvent density required by previous density methods is eliminated. The method is simple to operate and produces results at 10-minute intervals, although 20 minutes are required to complete each determination.

For cocoa powders, 95 per cent. of the results obtained for the fat content by the differential density technique were within ±0·46 per cent. w/w of those obtained by a Soxhlet extraction method, but for extrusion cakes and chocolate liquors the confidence limits were slightly wider.

Article information

Article type
Paper

Analyst, 1970,95, 809-816

The rapid determination of fat in cocoa products by using a differential density technique

A. M. J. Perl, A. D. Ince and P. H. Wiggall, Analyst, 1970, 95, 809 DOI: 10.1039/AN9709500809

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements