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METHOD FOR SIMULTANEOUSLY DETERMINING NITROGEN AND OXYGEN ISOTOPIC COMPOSITION OF NATURAL NITRATE AND NITROGEN AND OXYGEN ISOTOPIC COMPOSITION OF NATURAL NITRITE
METHOD FOR SIMULTANEOUSLY DETERMINING NITROGEN AND OXYGEN ISOTOPIC COMPOSITION OF NATURAL NITRATE AND NITROGEN AND OXYGEN ISOTOPIC COMPOSITION OF NATURAL NITRITE
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机译：同时确定天然硝酸盐和氮素同位素组成的氮气和氧同位素组合物的天然亚硝酸盐
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摘要
The disclosure describes a method for simultaneous determination of nitrogen and oxygen isotope compositions of natural nitrate and nitrite, which quantitatively converts natural nitrate and nitrite into an organic ester and a nitro-compounds respectively, and then nitrate and nitrite δ18O and δ15N are simultaneously determined by adopting a gas chromatography/pyrolysis/gas chromatography/isotope ratio mass spectrometry coupling technology (GC/Py/GC/IRMS). According to the method for simultaneously determining the nitrogen and oxygen isotope compositions of the natural nitrate salt and nitrite salt, the small amount of sample does not result in the loss, acquisition, exchange and fractionation of nitrogen and oxygen.
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