1. Compare the patterns on the chromatograms. Do any of the patterns appear to m

Question

1. Compare the patterns on the chromatograms. Do any of the patterns appear to match with stolen pen? Which ones? Explain your answer.

2.what can you conclude about the suspects in this case? Which suspect can you exclude(if any?)? Which suspect can you link to the crime scene?

3. If you were hired as an expert witness in a jury trial, how would you explain your link chemical analysis evidence to a jury? Include information about the Retention Factor.

4. Why do some molecules move further than others do on a chromatogram in the same amount of time?

I created and used tins lab as a Discussion Forum activity last semester, spring 2014. Case: Teacher pen disappear from the classroom. Besides students, no one came in the class during lecture time. To narrow down her search of finding thief, she decided to run paper chromatography of students' pens because she got the chromatography data of tier pen. She wants to use this data to find out victim This is the Chromatogram of Teacher stolen Pen. Use a ruler and find out distance traveled by the solvent as well as by each spot. Calculate and record Rf value of each color in student worksheet table. Experiment: Now presume that you have run paper chromatography of some anonymous pens

Explanation / Answer

I don't see any match.

The reference chromatogram has a better resolution.

As an expert:

-you can exclude all samples with clear evidenced spots,

- but you can say that the samples that were not well separated could be altered in some way and must be reanalysed.

For the rest, only theory and speculations.

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