作者:Anna Voloshenko Rossin、Sergey Sladkevich、Guy Gasser、Artem Melman、Ovadia Lev
DOI:10.1021/acs.analchem.7b02364
日期:2017.9.19
Nitroguanidine, a widely used nitramine explosive, is an environmental contaminant that is refractory, persistent, highly mobile in soils and aquifers, and yet under-researched. Nitroguanidine determination in water and soil poses an analytical challenge due its high hydrophilicity, low volatility, charge neutrality over a wide pH range, and low proton affinity which results in low electrospray interface
硝基胍是一种广泛使用的硝胺炸药,是一种耐环境的持久性污染物,在土壤和含水层中具有很高的流动性,但尚未得到充分研究。水和土壤中硝基胍的测定由于其高亲水性,低挥发性,在宽pH范围内具有电荷中性以及质子亲和力低而导致分析上的挑战,从而导致电喷雾界面(ESI)-MS灵敏度较低。建立了测定水和土壤基质中硝基胍的灵敏方法。该方法基于在酸性溶液中通过锌还原,通过衍生化进行疏水化,在C18柱上进行预浓缩以及LC-MS定量。在水和土壤中的检测极限(LOD)分别达到5 ng / L和22 ng / g。