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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 42488-2023 |
Soil quality - Determination of 15N abundance of inorganic nitrogen in soil - Stable isotope ratio mass spectrometry {译} 土壤质量 土壤中无机态氮15N丰度的测定 稳定同位素比值质谱法 |
China National Standards 15N |
 English PDF |
| GB/T 20622-2006 |
Stable isotope 15N Inorganic labelled compound 稳定性同位素15N无机标记化合物 |
China National Standards 15N |
English PDF |
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