Method for quantitatively determining fat in a fat-containing sa

Details Method for quantitatively determining fat in a fat-containing sa Method for quantitatively determining fat in a fat-containing sa

1979-07-25

1981-01-27

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250341, 250343, G01J 100

Patent

active

042477735

ABSTRACT:
Fat in a fat-containing sample, in particular a milk sample, is determined quantitatively by infrared absorption technique, using as sample waveband a band characteristic to carbon-hydrogen bonds, instead of the conventional triglyceride carbonyl band. This avoids the dependency of the measured result on the fat composition of the sample. Influences from other components in the sample are compensated for. A preferred method uses double wavelength determination, with sample wavelength in the interval from 3.475 to 3.51 .mu.m and reference wavelength in the range between 3.51 and 3.60 .mu.m.

REFERENCES:
patent: 3161768 (1964-12-01), Goulden
patent: 3803384 (1974-04-01), Braunlich
patent: 3839633 (1974-10-01), McKenna et al.
patent: 3972625 (1976-08-01), Takahasi et al.
patent: 4076983 (1978-02-01), Hopkins et al.
Goulden, J. D. S.: J. Sci. Food Agric. 7, p. 609, 1956.
Goulden, J. D. S.: Nature, p. 905, 1961.
Goulden, J. D. S.: J. Dairy Res., 31, p. 273, 1964.
Goulden, J. D. S.: J. Soc. Dairy Technol. 17, p. 28, 1964.
Grappin, R., Jeunet, R.: LeLait, p. 324, 1972.
Grappin, R., Jeunet, R.: LeLait, p. 498, 1976.
John Shields Thesis at U. of York, 1975.

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