isotope selective ammonia quantification in nitrogen reduction studies gas chromatography-mass spectrometry

Rapid advances in electrocatalytic ammonia synthesis are impeded by laborious detection methods commonly used in the field and by constant risk of external contaminations, which generates misleading false positives. We developed a facile real-time GC-MS method for sensitive isotope NH 3 quantification, requiring no external sample manipulations. This method ensures high detection reliability paramount to accelerate (electro-)catalyst screening. Direct, fast and sensitive isotopic ammonia detection is key to accessing reliable NRR experiments and accelerate catalyst screening. We develop a GC-MS method to detect NH 3 down to 1 ppm in the gas phase, in real-time and without external manipulation.