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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 17418.4-2010 |
Methods for analysis of noble metals in geochemical samples - Part 4: Determination of iridium content - Preconcentration by thiourea-catalytic spectrophotometric method 地球化学样品中贵金属分析方法 第4部分：铱量的测定 硫脲富集-催化分光光度法 |
China National Standards Determination urea 4: |
 English PDF |
| GB/T 2441.4-2010 |
Determination of urea - Part 4: Iron content 1,10 - Phenanthroline spectrophotometric method 尿素的测定方法 第4部分：铁含量 邻菲啰啉分光光度法 |
China National Standards Determination urea 4: |
English PDF |
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