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czhai

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wangenfei

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czhai: 金币+3, 翻译EPI+1, xiexie 2013-08-29 09:09:33
2 g sample , accurate to 0.5 mg, was dried for 2 hours with the temperature of 103 ± 2 ℃ in an electronic thermostat, subsequently transferred to a desiccator and cooled to room temperature, generally for about 30 minutes , then be weighed and calculated.
2楼2013-08-28 14:12:53
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wangenfei

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3楼2013-08-28 14:13:15
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skypeshaw

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czhai: 金币+2 2013-08-29 09:09:40
Weigh 2g(to the nearest 0.5mg) sample  ,then transfer into the electric oven, rise the heating temperature to 103 ° ± 2 °,  keep drying for 2 hours and then placed it in a desiccator to cool to room temperature, which generally takes 30 minutes, lastly, you need to weigh the sample calculately .
4楼2013-08-28 16:31:39
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