| 查看: 534 | 回复: 2 | |||
qhd511铁杆木虫 (著名写手)
|
[求助]
请帮忙润色一段化学试验操作，谢谢！
|
| 50 mL wastewater sample was accurately pipetted into a 100 mL beaker. Air-dried sludge sample was grinded a representative portion until it passed entirely through the 0.20 mm sieve to give a sub-sample of approximately 20 g. Approximately 1.0000 g sludge sample was accurately weighed into a 100 mL beaker, then added 2 mL N and 7 mL C to the wastewater and sludge samples as described above. and Thereafter, gently shaken to mix the contents, heating on an electric hot plate until they gave a lot of white smoke of N. The solutions obtained were cooled to room temperature, and 5 mL 50% (v/v) H was added. Heated again on the electric hot plate until they were evaporated to almost dryness. After cooling, the solutions in the breakers were transferred into 50 mL colorimetric tube times with a small amount of deionized water to 50 mL. Diluting the digestion solution properly, then added H and T acid following the calibration curve program. The final solution volume was kept at 50mL. |
回复此楼» 收录本帖的淘帖专辑推荐
 精品翻译集锦 |
» 猜你喜欢
浙江师范大学是怎么坑我的
已经有10人回复
-
浙江师范大学是怎么坑我的
已经有3人回复
-
求教各位大神：2026教育部人文社科青年基金项目何时公示呀？
已经有6人回复
-
面上有专家说实验设备不是我们单位的
已经有8人回复
-
科研求助
已经有4人回复
-
江苏省自然基金 什么时候出结果
已经有6人回复
-
闲聊
已经有3人回复
8814402
至尊木虫 (职业作家)
- 翻译EPI: 509
- 应助: 18 (小学生)
- 贵宾: 0.381
- 金币: 12921.1
- 散金: 47
- 红花: 16
- 帖子: 4185
- 在线: 357.9小时
- 虫号: 1184404
- 注册: 2011-01-06
- 专业: 药物学其他科学问题
2楼2012-05-08 11:33:50
qhd511
铁杆木虫 (著名写手)
- 翻译EPI: 1
- 应助: 324 (大学生)
- 金币: 6915.3
- 散金: 226
- 红花: 12
- 帖子: 1922
- 在线: 390.1小时
- 虫号: 1079710
- 注册: 2010-08-22
- 性别: GG
- 专业: 环境分析化学
3楼2012-05-08 12:13:03