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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 19143-2017 |
Analytical method of element for carbon,hydrogen ,oxygen and nitrogen in rock organics 岩石有机质中碳、氢、氧、氮元素分析方法 |
China National Standards Analytical method element |
 English PDF |
| GB/T 19143-2003 |
Analytical method of element for carbon，hydrogen and oxygen in rock organics 岩石有机质中碳、氢、氧元素分析方法 |
China National Standards Analytical method element |
English PDF |
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