GB/T 42488-2023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国家标准
英文:Soil quality—Determination of nitrogen-15 abundance of inorganic nitrogen in soil—Stable isotope ratio mass spectrome...
英文:Soil quality—Determination of nitrogen-15 abundance of inorganic nitrogen in soil—Stable isotope ratio mass spectrome...