Method of nondestructively measuring sugar content of fruit by u

Details Method of nondestructively measuring sugar content of fruit by u Method of nondestructively measuring sugar content of fruit by u

1992-08-27

1994-06-28

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250341, G01N 2135

Patent

active

053249453

ABSTRACT:
A method of nondestructively measuring the sugar content of fruit comprising irradiating the fruit with near infrared radiation such that the radiation penetrates the fruit; measuring the absorbance at a given wavelength with a wavelength selector that is placed in the optical path of the near infrared radiation; normalizing the obtained absorbance, taking account of the size of the fruit; and finding an index of the sweetness of the fruit from the normalized measured absorbance. Thus, the sugar content of fruits, especially of fruits having thick skins, can be measured nondestructively with practically acceptable accuracy.

REFERENCES:
patent: 4883953 (1989-11-01), Koashi et al.
patent: 5089701 (1992-02-01), Dull et al.
Dull et al, "Near Infrared Analysis of Soluble Solid in Intact Cantaloupe", J. Food Science, 54(2), Mar./Apr. 1989, pp. 393-395.
Article entitled "Determination of Sugars in Satsuma Orange Using NIR Transmittance", by Sumio Kawano, Tetsuo Sato and Mutsuo Iwamoto, published in Making Light Work: Advances in Near Infrared Spectroscopy, Ian Michael Pulblications, title pages, pp. 387-393, 1992.
Abstract of Lecture Given Aug. 19-23, 1991 in Aberdeen, Scotland entitled "Determination of Sugars in Satsuma Oranges using NIR Transmittance", by S. Kawano, T. Sato & M. Iwamoto, Aug. 1991.

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