| 1. | add the crystalline dihydrate(5g)to acetic anhydride(10)in a beaker.
向盛有10醋酸酐的烧杯内加入5g二水合物结晶。 |
| 2. | We have found these bands in benzoylbenzoate to occur at 1789 cm－1 and 1727 cm－1 .
我们发现苯甲酐的这些谱带在1789厘米1（559微米）和1727厘米1（579微米）。 |
| 3. | Preparation of isomerized methyl tetrahydrophthalic anhydride
异构化甲基四氢苯酐的研制 |
| 4. | Chemical analysis of phthalic anhydride . determination of 1 . 4 - napthaquinone
酞酐的化学分析.荼醌的测定 |
| 5. | Natural mineral phosphates . dissolving of the total phosphoric anhydride
天然矿物磷酸盐.磷酸酐的全部溶解 |
| 6. | Chemical analysis of maleic and phthalic anhydrides . determination of ash
马来酐和酞酐的化学分析.灰分测定 |
| 7. | Chemical analysis of phthalic anhydride . measurement of coloration hazen scale
酞酐的化学分析.染色度的测量 |
| 8. | Standard test method for analysis of acetic anhydride using gas chromatography
用气相色谱法分析乙酸酐的标准试验方法 |
| 9. | Sampling and handling naphthalene , maleic anhydride and phthalic anhydride
萘,顺丁烯二酐,苯三甲酸酐的抽样和处置方法 |
| 10. | Chemical analysis of acetic acid and acetic anhydride . determination of mercury
醋酸和醋酸酐的化学分析.汞含量的测定 |
