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ll870632

新虫 (初入文坛)

[求助] 木质素的含水率 急!急!急![

各位大虾:
  有哪位测定过木质素的含水率:取样质量?温度和时间分别是多少?

[ Last edited by 东昌莘 on 2011-5-9 at 14:00 ]
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wuqin520

木虫 (著名写手)

【答案】应助回帖

ll870632(金币+50): 2011-05-18 09:15:47
引用回帖:
Originally posted by ll870632 at 2011-05-09 10:36:43:
各位大虾:
  有哪位测定过木质素的含水率:取样质量?温度和时间分别是多少?

[ Last edited by 东昌莘 on 2011-5-9 at 14:00 ]

http://wenku.baidu.com/view/d9a898ce0508763231121225.html
anything
2楼2011-05-10 15:07:36
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yedezhan

金虫 (正式写手)

【答案】应助回帖

就是测定工业木质素中水分、灰分的含量吗?
参考下面文献:Physicochemical characterisation of sugar cane bagasse lignin
oxidized by hydrogen peroxide

The relative contents of moisture, dry soda lignin and mineral
matter were obtained according to the following method. Three
samples of rawsoda ligninwereweighed and left in an oven heated
at 110 C in air during one night. The correspondingweight losswas
ascribed to moisture.
Three other weighed samples placed in
alumina crucibles were introduced in a furnace heated at 800 Cin
air during one night, in order to burn and remove any organic and
volatile substances. The remaining matter was identified as ashes
andweighed. Theweight percent of dry soda ligninwas obtained as
the difference: 100  moisture wt%  ashes wt%.
简单的幸福
3楼2011-05-11 12:13:48
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