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An Automatic Sampling System for Respiratory Gases and Respiratory Response of Irradiated Citrus Fruits
Author(s) -
GREEN G. F.,
AHMED E. M.,
DENNISON R. A.
Publication year - 1969
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1969.tb12107.x
Subject(s) - irradiation , respiratory system , airflow , sampling (signal processing) , chemistry , environmental science , radiochemistry , biology , optics , anatomy , mechanical engineering , physics , detector , nuclear physics , engineering
SUMMARY: An automatic continuous‐flow sampling system for monitoring respiratory gas was developed. Continuous airflow at constant pressure and temperature was pumped through 24 chambers. The airflow was regulated by needle valves connected to 3‐way solenoids which sequentially switched the sample to a CO 2 infrared analyzer and recorder. A timing cycle was selected so that each sample was analyzed every 3 hr. The recorder was calibrated to read directly in percent CO 2 . Results were expressed as ml CO 2 /kg product/hr. The system was used to determine the respiratory activity of irradiated and nonirradiated citrus fruits. Irradiated fruits exhibited marked increases in CO 2 production reaching a maximum 1‐2 days after treatment then gradually declining. Waxing limited the production of CO 2 especially with irradiated fruits. All fruits were treated with sulfanilamide to prevent post irradiation infection by mold.