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zxfgb(½ð±Ò+5, ·ÒëEPI+1): 2011-05-14 19:46:42
| Took 1g food plastic bags, cut them into pieces and made them dry. Dissolved them into heptane at 25 ¡æ for 60 minutes. Took 25 ml of the soak solution into a separatory funnel, then extracted with acetonitrile twice. Mixed the acetonitrile phase, then condensed it by nitrogen flow. Stored at 4¡æ after set to a constant volume of water. The treated solution is the sample solution, which was used in the standard addition test. |

2Â¥2011-05-13 14:48:51














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