The accurate determination of nitrogen-15 with an emission spectrometer

Dynamics of microbial biomass nitrogen as influenced by organic matter application in paddy fields

“…The amount of total N (ammonium and organic N) in the soil and rice plant was determined by Kjeldahl digestion and steam distillation. The 15N abundance of the samples was determined by emission spectrometry (Yamamuro 1981).…”

Kinetics of15N-labelled nitrogen from co-compost made from cattle manure and chemical fertilizer in a paddy field: Effect of mixing ratio of cattle feces and ammonium sulfate

“…The 15N abundance of the samples was determined by instrumental analysis using a mass spectrometer, ANCA-NT (Europa Scientific Ltd~, U.K.). However, the 15N abundance of the rice plant samples in the E plot was determined by emission spectrometry (Yamamuro 1981), because the amount of applied C5NH4)2S04 to the E plot was 5.067 atom% excess. It was assumed that this method was suitable for the determination since the 15N atom% was sufficient.…”

Inhibition of nitrogen uptake by rice after wheat straw application determined by tracer NH4+-15N

“…Analysis of 15N atom% was performed by emission spectrometry (Yamamuro 1981) using a 15N Analyzer (N-150 by Japan Spectroscopic Co. Ltd.).…”