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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 17674-2021 |
Determination of nitrogen in crude oil -- Boat-inlet chemiluminescence 原油中氮含量的测定 舟进样化学发光法 |
China National Standards Determination nitrogen crude |
 English PDF |
| GB/T 17674-2012 |
Determination of nitrogen in crude oil by boat-inlet chemiluminescence 原油中氮含量的测定 舟进样化学发光法 |
China National Standards Determination nitrogen crude |
English PDF |
| GB/T 24318-2009 |
Determination of total nitrogen content in animal feeding stuffs by combustion according to the dumas principle and calculation of the crude protein content 杜马斯燃烧法测定饲料原料中总氮含量及粗蛋白质的计算 |
China National Standards Determination nitrogen crude |
English PDF |
| GB/T 5511-2008 |
Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method 谷物和豆类 氮含量测定和粗蛋白质含量计算 凯氏法 |
China National Standards Determination nitrogen crude |
English PDF |
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