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qhd511: ½ð±Ò+15, ¡ï¡ï¡ïºÜÓаïÖú 2012-08-10 11:20:22
qhd511: ½ð±Ò+15, ¡ï¡ï¡ïºÜÓаïÖú 2012-08-10 11:20:22
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5 g A was put in conical beaker which full scale is 50 ml and about 30 ml extract was added, then the conical beaker with cork was placed on the oscillators and oscillated for 20 minutes with frequency of 200 r/min. Percolate obtained from oscillated extract With glass sand core of funnel filtering was used to determine B. רҵÃû´Ê·ÒëµÄ¿ÉÄܲ»×¼È·£¬Çë×öÏàÓ¦µÄµ÷Õû¡£ |
3Â¥2012-08-10 10:34:43
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qhd511: ½ð±Ò+10, ·ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú 2012-08-10 11:20:15
qhd511: ½ð±Ò+10, ·ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú 2012-08-10 11:20:15
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5g A and 30mL extract to 50 mL grinding mouth triangular flask(or erlenmeyer flask), , covering the plug, are oscillated in the oscillator for 20min, at the speed of 200r /min.The extract oscillated is filtrated through the sand core glass funnel and the filter liquor is used to determinate B. ¹©LZ²Î¿¼¡£ |

2Â¥2012-08-10 10:20:34














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