Post 355380 (https://www.thevespiary.org/talk/index.php?topic=7093.msg35538000#msg35538000)
(Aurelius: "newest method", Chemistry Discourse)
It seems that ozone will oxidise ammonia to nitrate under the right conditions
Ozone has an intensive influence on the nitrogen circuit. At pH-values of more than 7, the toxic ammonia is oxidized to nitrate and at ph-values of around 7, the toxic ammonia is not oxidized, so bacterial oxidation is required. But in any case the very toxic nitrite step will be oxidized by ozone to nitrate - this reaction being pH-value independent - so nitrite is oxidized to nitrate. This is most important, as nitrite even in small traces is a poisonous compound for fish. The decrease of nitrite and ammonia is the faster the higher the ozone content is.
er.. so basically maybe you could oxidise ethylamine to nitroethane using ozone. I'd imagine yields would be pretty high too. Ive seen it available in small aerosol cans for small aqauria and you can also buy ozone generators although they can be rather expensive.
http://homex.coolconnect.com/member3/bengtecktan/koi/ozone_facts.htm (http://homex.coolconnect.com/member3/bengtecktan/koi/ozone_facts.htm)