GB/T 42490-2023土壤质量土壤与生物样品中有机碳含量与碳同位素比值、全氮含量与氮同位素比值的测定稳定同位素比值质谱法国家标准
英文:Soil quality—Determination of total content and isotope ratio of organic carbon and nitrogen of soil and biological s...
英文:Soil quality—Determination of total content and isotope ratio of organic carbon and nitrogen of soil and biological s...