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yjhorn
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ÖªÇïÒ»Ò¶~(½ð±Ò+15,VIP+0):»¹¿ÉÒÔ 1-21 09:35
ÖªÇïÒ»Ò¶~(½ð±Ò+15,VIP+0):»¹¿ÉÒÔ 1-21 09:35
| Stir the capped sample 3ml 1mol/L boron trifloride /methanol solution and then heat in a bath for 10 minutes (when methyl esterification takes place). Add 0.5ml n-hexane and extract after it cooled. The upper organic phase is analysed by gas chromatography-mass spectrometry. |

2Â¥2010-01-19 15:30:44
shirongjiu
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HAVA A TRY
| add 3ml of boron trifloride/methanol (3mol/L) into capped tube containing samples to be determined and stir. Then incubate the tube in water bath at 70~75¡æ for 10 minutes (during which methyl esterification takes place). Add 0.5ml n-hexane and extract after it cooled. Finally, the upper organic phase is subjected to gas chromatography-mass spectrometry analysis. |
3Â¥2010-01-20 08:19:00














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