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A datum line mustn't be drawn in ink so that when you add the solvent while doing chromotography, the ink doesn't spread and it might even mix with the actual color that you are testing on and that could change the r f value whereas if you draw it with a pencil, the results would be more accurate.
Hope that helps :)!
What else can I help you with?
What is the material in a pencil?
The material in a pencil is typically graphite, a form of carbon that leaves a mark when drawn on paper. The graphite is mixed with clay to create the pencil "lead" that is encased in the wooden barrel of the pencil. The hardness of the lead can vary, producing different shades and line thicknesses.
Why is the chromatograph line dawn in pencil and not ink?
The chromatograph line is drawn in pencil because pencil marks are more permanent and less likely to smudge when in contact with the organic solvents used in chromatography. Ink can dissolve or spread when exposed to these solvents, affecting the accuracy of the chromatogram.
Why must pencil line be drawn above the level of solvent?
Drawing a pencil line above the level of the solvent ensures that the compound being separated does not dissolve directly in the solvent, preventing interference with the separation process. This helps maintain a distinct separation between the solvent front and the compounds being separated, leading to more accurate results during chromatography.
How do you melt a pencil top eraser?
Melting a pencil top eraser can release toxic fumes due to the chemicals in the eraser material. It is not recommended to melt a pencil top eraser, as it can be harmful to your health. If you need to reshape the eraser, consider using alternative methods like cutting or shaping with a knife.
Is a pencil poison?
If your asking if the pencil has Lead, then the answer is that most pencils do NOT have lead in them anymore.
Is Curious George drawn with a pencil?
Yes he is drawn with pencil
How do you use the word drawn in a sentence?
How much have you drawn from the well? That was a well-drawn caricature of me. Was that drawn with pencil or pen?
What do you call the line drawn in baseball from 1st to 2nd to 3rd and home again?
Baseline
What is current drawn by pencil cell of 1.5 v?
nothing..............
Bangladesh is about the size of blank?
blank paper drawn by pencil
When setting up a chromatogram suggest why the base line where dyes are placed is not drawn with a pen?
The baseline where dyes are placed in a chromatogram is typically not drawn with a pen because the ink from the pen could potentially interfere with the separation of the dyes. Using a pen may introduce additional components into the chromatogram that can affect the accuracy and reliability of the analysis. Instead, a pencil or other non-reactive marking tool is typically used to mark the baseline.
How do you xxplain the problem that will be created if you mark the original baseline with a washable felt-tip pen instead of a pencil?
Using a washable felt-tip pen instead of a pencil to mark the original baseline can cause the ink to bleed or smudge when exposed to moisture or handling. This can lead to inaccuracies in measurements or project alignment. Additionally, the ink may fade over time, making it difficult to refer back to the original baseline.
Should a layout be drawn in pencil?
Yes, because if you make a mistake you can erase it.
What is drawn by everyone without pen or pencil?
How about Breath, or you could draw Curtains as well.
Does the laminating proccess ruin pencil drawn pictures?
no its just like drawing on them again
Why do you need a pencil to draw?
You need a pencil to draw because you need to erase when your doing sketch.
Will a line drawn by a pencil conduct electricity?
Yes, pencil lines can conduct electricity to a certain extent, as the graphite in pencils is a form of carbon which can conduct electricity. However, it may not be as effective a conductor as other materials designed specifically for that purpose.
