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Correction of infra‐red gas analyser readings for changes in reference tube CO 2 concentration
Author(s) -
THORPE M. R.
Publication year - 1978
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/j.1365-3040.1978.tb00747.x
Subject(s) - analyser , tube (container) , calibration , calibration curve , constant (computer programming) , infrared , analytical chemistry (journal) , chemistry , materials science , optics , mathematics , chromatography , physics , computer science , statistics , composite material , detection limit , programming language
The theoretical basis for correcting infra‐red gas analyser readings for changes in reference tube CO 2 concentration is developed, but in practice the corrections made are empirical. Analyser gain (G A ) is related to reference tube concentration (A) in hyperbolic manner. The constants in the equation are determined by plotting 1/G A against A. Calibration and operating procedure for a particular type of analyser are described and a numerical example given.