Oxygen isotope ratio measurements of NO₂⁻ and NO₃⁻ by the azide method and denitrifier method are sensitive to the δ¹⁸O value of the sample water. However, the influence of δ¹⁸O_H2O on those measurements has not been quantitatively evaluated and documented so far. Therefore, we investigated the influence of δ¹⁸O_H2O of a sample on the δ¹⁸O analysis of NO₂⁻ and NO₃⁻.

中文翻译：

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水的δ18O对亚硝酸盐和硝酸盐的δ18O测定的影响

NO的氧同位素比测量₂ ^-和NO ₃ ^-由叠氮化物法和反硝化方法是对敏感δ ¹⁸的试样水的O值。然而，影响δ ¹⁸ Ø _H2O这些测量尚未定量评价，至今记录在案。因此，我们研究的影响δ ¹⁸ ö _H2O的样品的对δ ¹⁸ NO的O分析₂ ^-和NO ₃ ^- 。