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Correction for Dissolved Nitrous Oxide in Nitrogen Studies¹

ABSTRACT

Rapid methods for the accurate determination of N₂O in atmospheres of closed incubation flasks are now available. However, serious errors in measuring total N₂O within a closed system may arise if dissolved N₂O is not considered. Temperature and the ratio of solution volume to atmosphere volume are important factors determining the magnitude of errors resulting from this cause. A simple formula for calculating dissolved N₂O based on solution and atmosphere volumes, the mass of N₂O in the gaseous phase, and published solubility data for N₂O in water is presented. If the chemical composition of the solution phase is likely to influence solubility coefficients, these values can be experimentally determined using a described technique.

¹ Contribution from Dep. of Soils, North Dakota State Univ., Fargo, ND 58102. Published with the approval of the Director as Journal Ser. No. 781.

² Professor of Soils and Graduate Assistant, respectively.

Received for publication June 27, 1977. Accepted for publication September 7, 1977.

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