| 查看: 528 | 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
建议基金发布提前给出明确的时间点
已经有12人回复
-
2026国自然函评费到账
已经有3人回复
-
科研孤儿太难了
已经有17人回复
-
今日不放榜？网传国自然预计 8 月 27 日可查结果
已经有19人回复
-
看来今天不会放榜了？
已经有11人回复
-
时间戳又变了
已经有19人回复
-
filecode，4个jtjc了
已经有14人回复
-
让我中一个面上吧！
已经有13人回复
-
人气不行了
已经有7人回复
-
感觉是下周放榜了
已经有12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
