| 1. | Methods of test for sulphuric acid , oleum and liquid sulphur trioxide
硫酸.发烟硫酸及液态三氧化硫试验方法 |
| 2. | Free sulfur trioxide
游离三氧化硫 |
| 3. | Phosphate rock and concentrate - determination of sulfur trioxide content - gravimetric method
磷矿石磷精矿中三氧化硫含量的测定重量法 |
| 4. | Workplace air - determination of sulfuric acid and sulfur trioxide - barium chloride turbidimetric method
车间空气中硫酸及三氧化硫的氯化钡比浊测定方法 |
| 5. | Standard test method for determination of organically combined sulfuric anhydride by titration , test method a
用滴定测试法a测量有机合成三氧化硫的标准试验方法 |
| 6. | Standard test method for determination of organically combined sulfuric anhydride ash - gravimetric , test method c
用灰分重量测试法c测量有机合成三氧化硫的标准试验方法 |
| 7. | Sulphuric acid and oleum for industrial use . determination of total acidity , and calculation of free sulphur trioxide content of oleum . titrimetric method
工业用硫酸和发烟硫酸.总酸度的测定和发烟硫酸中游离三氧化硫成分的计算.滴定法 |
| 8. | The experiments showed that there also existed a parallel reaction between cca and so3 as well as an intercrossing reaction between caprolactam and nitrosyl sulfuric acid , except for the nitrosation of cca
实验证实了该过程伴有环己烷羧酸与三氧化硫作用的平行副反应以及己内酰胺与亚硝基硫酸作用的串联副反应，由此提出了亚硝化过程的反应动力学模型。 |
| 9. | Taking the workability , strength and durability of high performance concrete into integrated consideration , the content of sulphur trioxide in this early strength type chlorine resistant portland cement should be controlled between 1 . 3 % and 2 . 2 %
综合考虑高性能混凝土的工作性、强度和耐久性，早强型抗氯盐硅酸盐水泥的三氧化硫的含量宜控制在1 . 3 % ~ 2 . 2 % 。 |
