Proposal for a Rationalized System of Units for Postharvest Research in Gas Exchange

TLDR

Gas exchange studies use a single prefix per unit set, typically in the numerator, and data are derived from equipment measuring absolute gas amounts in a sample volume. The authors provide conversion factors (Table 2) to translate commonly used units into the new system and calibrate equipment with volumetric standards, yielding raw mole‑fraction data. Discussion focuses on measured variables.

Abstract

3and only one prefix to be used per set of units, normally in the numerator. Table 2 provides factors for converting alternative units frequently used in the literature to those of the new system. DISCUSSION Measured variables. All data presented for publication on gases ultimately derive from the analysis of gas samples with equipment that responds to the absolute amount of gas present in a given sample volume (= n mol). Calibration of this equipment is usually achieved with volumetrically prepared standards and the raw data used in subsequent calculations are therefore mole fractions