The aim of the present study was to evaluate the potential of vanadium (III) chemistry to analyse NOx in dairy products using a manual, non-chromatographic technique. In this way, traditional reduction of NO3 with cadmium, zinc or enzymes can be avoided, thereby simplifying the analysis. The reduction and reaction procedures have been optimised, performance parameters estimated, and the method confirmed to be a useful routine alternative for compliance testing of Nox in dairy laboratories