Development of Gas Separation Membrane-Modified Air System·CO₂ Evolution Analyzer for Determining Respiration of Fruits and Vegetables under Low Oxygen Atmosphere

Studies on Sensitivity of Vegetables to Low Oxygen Part 1

Abstract

A gas separation membrane-modified air system (GSM-MAS) ·CO₂ evolution analyzer was developed to determine the effects of low oxygen atmosphere on the respiration of harvested fruits and vegetables. The equipment was composed of gas separation membrane-modified air generator, gas tight chamber, O₂ and CO₂ sensors. The equipment produces the desired low oxygen atmosphere and determines the respiration rate by measuring the rate of carbon dioxide evolution from plant materials. The GSM-MAS · CO₂ evolution analyzer well controlled the atmosphere within the range of optional oxygen concentration, and the results suggested that the analyzer provides a useful means to study the effects of low oxygen atmosphere on the respiration of fruits and vegetables. The respiratory response of spinach to a low oxygen atmosphere is also discussed.