Huber B1, Bernasconi SM, Luster J, Pannatier EG.
Rapid Commun Mass Spectrom. 2011 Oct 30;25(20):3056-62. doi: 10.1002/rcm.5199.The nitrogen (δ(15)N) and oxygen isotope (δ(18)O) analysis of nitrate (NO(3)(-)) from aqueous samples can be used to determine nitrate sources and to study N transformation processes. For these purposes, several methods have been developed; however, none of them allows an accurate, fast and inexpensive analysis. Here, we present a new simple method for the isolation of nitrate, which is based on the different solubilities of inorganic salts in an acetone/hexane/water mixture. Read More