| 1. | Determination of iron content - orthopenanthroline photometric method 邻二氮杂菲分光光度法测定铁量 |
| 2. | The ortho - phenanthroline photometric method for the determination iron content 邻二氮杂菲光度法测定铁量 |
| 3. | The ortho - phenanthroline photometric method for the determination of iron content 邻二氮杂菲光度法测定铁量 |
| 4. | Determination of iron oxide content - orthophenanthroline photometric method 邻二氮杂菲光度法测定三氧化二铁量 |
| 5. | The o - phenanthroline photometric method for the determination of ferric oxide content 邻二氮杂菲光度法测定三氧化二铁量 |
| 6. | Silica refractories - determination of iron oxide content - o - phenanthroline photometric method 邻二氮杂菲光度法测定三氧化二铁量 |
| 7. | Magnesium and its alloys - determination of iron content - orthophenanthroline spectrophotometric method 邻二氮杂菲分光光度法测定铁量 |
| 8. | Magnesite - chrome refractories - determination of iron oxide content - o - phenanthroline photometric method 邻二氮杂菲光度法测定三氧化二铁量 |
| 9. | Fireclay and high - alumina refractories - determination of iron oxide content - o - phenanthroline photometric method 邻二氮杂菲光度法测定三氧化二铁量 |
| 10. | Aluminium and aluminium alloys - determination of iron content - orthopenanthroline photometric method 铝及铝合金化学分析方法邻二氮杂菲分光光度法测定铁量 |