| 查看: 783 | 回复: 3 | ||
sunnyyang09捐助贵宾 (小有名气)
|
[求助]
谱析TU-1810和PE Lambda 25紫外可见光谱仪，想配50微升比色皿，中心高度应该怎么选？ 已有2人参与
|
| 请教各位：谱析TU-1810和PE Lambda 25紫外可见光谱仪，想配50微升比色皿，中心高度的规格有8,15,20mm，请问应该选多少mm?非常感谢！ @学术巨星 |
回复此楼» 猜你喜欢
参与限项
已经有3人回复
-
假如你的研究生提出不合理要求
已经有7人回复
-
实验室接单子
已经有4人回复
-
全日制（定向）博士
已经有4人回复
-
对氯苯硼酸纯化
已经有3人回复
-
求助:我三月中下旬出站，青基依托单位怎么办？
已经有12人回复
-
不自信的我
已经有12人回复
-
所感
已经有4人回复
-
要不要辞职读博？
已经有7人回复
-
北核录用
已经有3人回复
wenlingd
至尊木虫 (著名写手)
- 应助: 38 (小学生)
- 金币: 13109.2
- 红花: 12
- 帖子: 2186
- 在线: 489.3小时
- 虫号: 245181
- 注册: 2006-04-23
- 专业: 色谱分析
2楼2019-04-13 05:45:24
sunnyyang09
捐助贵宾 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 430.8
- 红花: 1
- 帖子: 103
- 在线: 210.8小时
- 虫号: 1345661
- 注册: 2011-07-14
- 专业: 食品加工学基础
3楼2019-04-15 13:39:58
【答案】应助回帖
|
不同厂家中心高度：https://www.starna.com/starna-cells/cell-height-finder 自己检测中心高度的方法：https://www.starna.com/cells/z-dimension How can I determine the Z Dimension of my instrument myself? Some instruments have cell holders with different z heights, or where the z height can be varied in respect to the alignment with the instrument light beam. It is therefore useful to know how to determine the z height oneself. Method 1 You can test for the Z dimension of your instrument yourself very easily. Simply follow these steps: 1) Cut a piece of dense white card or paper 12 mm wide and 100 mm long (approximately). 2) Make a hole in the centre of the paper about 3 mm in diameter (just push a ballpoint pen through the paper) 8.5 mm from the bottom of one end and 15 mm from the bottom of the other. 3) Turn on your spectrophotometer in %T mode and set to any reasonable wavelength. 4) Place the piece of paper with the hole in the end into the cell holder as if it were a cell. Whichever end (either 8.5mm or 15mm) transmits light will tell you the Z dimension of your instrument. 5) If neither works then make up another piece of paper with holes placed at different dimensions and determine which works best. Method 2 Alternatively if you can easily access the sample compartment, a simple method to determine this height would be to set the instrument to measure at a visible wavelength (546 nm for example), insert a piece of white card into the sample compartment and then mark the card with a pen/pencil where the beam intersects. The distance from the bottom of the card to the mark should give the approximate height of the beam. |
4楼2019-04-23 10:11:22