24小时热门版块排行榜    

查看: 495  |  回复: 2
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

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 ]
回复此楼

» 猜你喜欢

» 本主题相关价值贴推荐,对您同样有帮助:

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

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
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 3 个回答

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
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 299求调剂 +4 15188958825 2026-03-25 4/200 2026-03-25 22:56 by 418490947
[考研] 考研调剂 +6 呼呼?~+123456 2026-03-24 6/300 2026-03-25 22:55 by 418490947
[考研] 考研调剂 +6 来好运来来来 2026-03-21 7/350 2026-03-25 22:43 by 418490947
[考研] 321求调剂 +3 璞玉~~ 2026-03-25 3/150 2026-03-25 19:07 by Zhanglab-TJU
[考研] 086000生物与医药292求调剂 +4 小小陈小小 2026-03-22 7/350 2026-03-25 19:07 by 星空星月
[考研] 333求调剂 +6 87639 2026-03-21 11/550 2026-03-25 16:17 by 87639
[考研] 材料与化工考研调剂 +9 孅華 2026-03-22 9/450 2026-03-25 13:09 by cmz0325
[考研] 303求调剂 +6 元夕元 2026-03-20 7/350 2026-03-25 12:00 by edmund7
[考研] 材料学硕,求调剂 6+4 糖葫芦888ll 2026-03-22 9/450 2026-03-25 11:19 by greychen00
[考研] 289材料与化工(085600)B区求调剂 +4 这么名字咋样 2026-03-22 5/250 2026-03-25 08:20 by mx.yue
[考研] 材料专硕找调剂 +5 哈哈哈吼吼吼哈 2026-03-23 5/250 2026-03-24 19:07 by 了了了了。。
[考研] 307求调剂 +5 超级伊昂大王 2026-03-24 5/250 2026-03-24 15:46 by 星空星月
[考研] 一志愿北京化工大学材料与化工 264分各科过A区国家线 +3 哈哈157349 2026-03-21 3/150 2026-03-24 14:11 by zhyzzh
[考研] 336化工调剂 +4 王大坦1 2026-03-23 5/250 2026-03-23 18:32 by allen-yin
[考研] 328求调剂 +4 LHHL66 2026-03-23 4/200 2026-03-23 14:55 by lbsjt
[考研] 求老师收我 +3 zzh16938784 2026-03-23 3/150 2026-03-23 12:56 by ztnimte
[考研] 308求调剂 +3 墨墨漠 2026-03-21 3/150 2026-03-22 16:54 by i_cooler
[考研] 一志愿华中科技大学071000,求调剂 +4 沿岸有贝壳6 2026-03-21 4/200 2026-03-22 07:21 by ilovexiaobin
[考研] 085600材料与化工306 +4 z1z2z3879 2026-03-21 4/200 2026-03-21 23:44 by ms629
[考研] 求助 +5 梦里的无言 2026-03-21 6/300 2026-03-21 17:51 by 学员8dgXkO
信息提示
请填处理意见