| 查看: 778 | 回复: 6 | |||
| 当前主题已经存档。 | |||
| 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 | |||
[交流]
Mass defect是什么意思?
|
|||
各位哥哥姐姐好,我想请教一个问题 TOF/MS中Mass defect参数是什么意思呢?应该怎么设置呢 [search]Mass defect[/search] |
回复此楼» 猜你喜欢
拟解决的关键科学问题还要不要写
已经有8人回复
-
最失望的一年
已经有12人回复
-
存款400万可以在学校里躺平吗
已经有29人回复
-
求推荐英文EI期刊
已经有5人回复
-
请教限项目规定
已经有4人回复
-
国自然申请面上模板最新2026版出了吗？
已经有20人回复
-
26申博
已经有3人回复
-
基金委咋了？2026年的指南还没有出来？
已经有10人回复
-
基金申报
已经有6人回复
-
疑惑？
已经有5人回复
pegasusm
金虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 1256.5
- 帖子: 243
- 在线: 2.7小时
- 虫号: 433126
- 注册: 2007-08-18
- 性别: GG
- 专业: 生化分析及生物传感
7楼2008-03-13 22:53:24
2楼2008-03-13 08:34:13
dnp
荣誉版主 (知名作家)
小木虫浪子
- 应助: 74 (初中生)
- 贵宾: 18.476
- 金币: 18799.9
- 散金: 2040
- 红花: 77
- 沙发: 6
- 帖子: 7304
- 在线: 593.8小时
- 虫号: 437184
- 注册: 2007-08-26
- 性别: GG
- 专业: 生物信息学
- 管辖: 有机交流
|
%r- Apparatus for detecting a plurality of ion peaks within at least one transient" in time of flight mass spectrometry, said transient being generated in response to an ion source extraction pulse, said apparatus comprising: signal detector means responsive to said ion peaks for detecting/each of said ion peaks and generating an output signal indicative of the intensity of each of said ion peaks; means for turning on said signal detector means only for a data collection time window beginning just prior to an expected arrival time of each said ion peak; and means for processing said ion peaks to generate a mass spectrum file indicative of intensities of said ion peaks. 2. The apparatus of claim 1 , further comprising mass defect detector means for monitoring an actual arrival time for each said ion peak at said signal detector means and causing said data collection time window to be shifted in accordance with said actual arrival time of each said ion peak such that each said ion peak falls within an approximate center of said data collection time window. 3. The apparatus of claim 2, wherein said mass defect detector means comprises a plurality of delta-mass tables, each said table containing a plurality of time delay values for causing said signal detector means to be turned on at times slightly prior to said expected time of arrival of each said ion peak depending on a mass defect of said ion peak, to thereby cause each said data collection time window to be shifted such that each said ion peak falls completely within one of said data collection time windows. 摘自：http://www.wipo.int/pctdb/en/wo.jsp?WO=1995%2F00236&IA=WO1995%2F00236&DISPLAY=CLAIMS TOF/MS我也不是很大懂，这个大致意思应该是设定一个值，使离子在这个值所设定范围内能够被检测器所检测到。 |
3楼2008-03-13 08:54:44
agilent
金虫 (小有名气)
- 应助: 15 (小学生)
- 金币: 2964.8
- 红花: 6
- 帖子: 233
- 在线: 93.3小时
- 虫号: 511531
- 注册: 2008-02-25
- 性别: GG
- 专业: 色谱分析
4楼2008-03-13 08:59:02