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The extraction time must be adjusted to obtain quantitative recoveries. Thus,extraction efficiency increases with the sonication time until equilibrium is reached.Extraction times of between 3 and 60 min are described in the literature. Longer extraction times could produce a significant reduction of the recoveries obtained,probably due to degradation of the compounds or decomposition of the organic solvent caused by the effects of the ultrasound waves [ Last edited by musashino on 2010-7-28 at 09:59 ] |
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- ·ÒëEPI: 323
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2Â¥2010-07-28 13:00:29
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- ·ÒëEPI: 323
- Ó¦Öú: 91 (³õÖÐÉú)
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- ½ð±Ò: 19237.1
- É¢½ð: 40372
- ºì»¨: 275
- ɳ·¢: 183
- Ìû×Ó: 25406
- ÔÚÏß: 1082.3Сʱ
- ³æºÅ: 1034379
- ×¢²á: 2010-06-02
- ÐÔ±ð: GG
- רҵ: Ò©ÎïÉè¼ÆÓëÒ©ÎïÐÅÏ¢
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3Â¥2010-07-28 13:06:59
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- ·ÒëEPI: 323
- Ó¦Öú: 91 (³õÖÐÉú)
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- É¢½ð: 40372
- ºì»¨: 275
- ɳ·¢: 183
- Ìû×Ó: 25406
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- ×¢²á: 2010-06-02
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- רҵ: Ò©ÎïÉè¼ÆÓëÒ©ÎïÐÅÏ¢
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4Â¥2010-07-28 13:09:40
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- ·ÒëEPI: 323
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- É¢½ð: 40372
- ºì»¨: 275
- ɳ·¢: 183
- Ìû×Ó: 25406
- ÔÚÏß: 1082.3Сʱ
- ³æºÅ: 1034379
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- רҵ: Ò©ÎïÉè¼ÆÓëÒ©ÎïÐÅÏ¢
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5Â¥2010-07-28 13:15:19
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- ·ÒëEPI: 323
- Ó¦Öú: 91 (³õÖÐÉú)
- ¹ó±ö: 16.835
- ½ð±Ò: 19237.1
- É¢½ð: 40372
- ºì»¨: 275
- ɳ·¢: 183
- Ìû×Ó: 25406
- ÔÚÏß: 1082.3Сʱ
- ³æºÅ: 1034379
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6Â¥2010-07-28 13:28:24
7Â¥2010-07-29 09:02:18
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8Â¥2010-07-29 09:25:57
zhangzws
½ð³æ (ÕýʽдÊÖ)
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- ½ð±Ò: 1058.5
- É¢½ð: 15
- Ìû×Ó: 355
- ÔÚÏß: 115.3Сʱ
- ³æºÅ: 736112
- ×¢²á: 2009-03-31
- ÐÔ±ð: GG
- רҵ: ÄÜÔ´»¯¹¤
9Â¥2010-07-29 09:27:34














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