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sunnyyang09捐助贵宾 (小有名气)
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[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
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| 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 |
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sunnyyang09
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3楼2019-04-15 13:39:58
wenlingd
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2楼2019-04-13 05:45:24
【答案】应助回帖
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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