What could cause poor separation (such as streaking) in thin-layer chromatography of pen ink dyes?

Question

Question

Answer 1

Answer #1

Streaking is caused in thin layer chromatography of pen ink dyes because of the following reasons:

Very high concentration of the sample spot prohibits the substance from travelling as a single separated spot and thus they travel as streak.
Sometimes the solvent level covers the sample that causes the sample spot to be washed off.

Also keep in mind that Streaking can be eliminated by making the sample solution more dilute.

Answer 2

Similar Homework Help Questions

11. Why should you use pencil instead of pen when marking on a thin layer chromatography...

11. Why should you use pencil instead of pen when marking on a thin layer chromatography plate? a. Pencil lead isn't as dark. b. The components of pen ink will separate along with your sample, while pencil lead will not. c. Pen ink will not mark on a TLC plate. d. Pen ink will undergo a chemical reaction with the solvent. 12. Which of the following is not a reason to use thin-layer chromatography? a. To determine the number of...
1. What is the origin of the colors of the ink in the pens? Is the...

1. What is the origin of the colors of the ink in the pens? Is the ink made up of several dyes or just one? How do the colors of the dyes which are used result in the color of the ink which we observe? This question is from our chromatography lab where we saw the different color dyes in each pen. I know it has to do with their polarity, but I'm not sure why the different colored dyes...
What are the advantages and disadvantages of thin-layer chromatography, adsorption column chromatography, and gas chromatography techniques?...

What are the advantages and disadvantages of thin-layer chromatography, adsorption column chromatography, and gas chromatography techniques? (advantages and disadvantages for each type)

Why is thin layer chromatography used to determine the purity of a sample when you could...

Why is thin layer chromatography used to determine the purity of a sample when you could use an IR spectrum? How does TLC confirm the purity?
1. What is the purpose of Thin-Layer Chromatography (TLC)? D

1. What is the purpose of Thin-Layer Chromatography (TLC)? D
6. How was thin-layer chromatography utilized in the aspartame experiment? (In other words, what type of...

6. How was thin-layer chromatography utilized in the aspartame experiment? (In other words, what type of information could be revealed by this technique in the experiment?)

what kind of information about a compound do you get from melting point? Thin layer chromatography?...

what kind of information about a compound do you get from melting point? Thin layer chromatography? How could these be useful in assessing the product of a chemical reaction?
1. What is the purpose of Thin-Layer Chromatography (TLC)? 2. What are the phases involved in...

1. What is the purpose of Thin-Layer Chromatography (TLC)? 2. What are the phases involved in TLC? 3. What is coated on the TLC plate? 4. What is the purpose of lining the wall of the TLC chamber with paper? 5. Why is it important to use a small amount of the mobile phase? 6. Why should you remove the TLC plate before the mobile phase reaches the top? 7. What type of compounds are visible with UV light? 8....
1-4 1. What would happen if you used a water-soluble pen on the chromatography paper to...

1-4 1. What would happen if you used a water-soluble pen on the chromatography paper to mark your origin line? How would this affect the Re values? 2. A student accidently adds 17 ml of NaCl to their beaker rather than the 7 mL of NaCl they were suppose to add to their beaker. How might this mistake affect their chromatogram? Do you think they would be able to obtain any data? Briefly explain your answer. 10 3. Is it...

1. What are the main differences between thin layer chromatography (TLC) and column chromatography (CC)? 2. Are CC...

1. What are the main differences between thin layer chromatography (TLC) and column chromatography (CC)? 2. Are CC and TLC operations conducted concurrently? Explain. 3. Name a few packing materials used in packing columns in Column Chromatography operations. 4. Explain the role of eluting solvent(s) in column chromatography procedures. 5. When performing column chromatography, which of the following compounds would you expect to elute first: Ferrocene of acetylferrocene? Explain why.