P2
One of the chemical practical techniques I utilize was report chromatography. Chromatography is a method for analyzing complex mixtures (such as ink) by separating them into the chemicals from which they are made. Chromatography is used to separate and identify alone sorts of substances in police work. Drugs from narcotics to aspirin can be set in urine and blood samples, often with the aid of chromatography.
The system I used was the following:
1. Cut several coffee bean filters into long airs, one strip per drop a line.
2. Fold the end of apiece strip over then staple it to form a loop.
3. Place a dot of ink near the underside of each strip. Use a pencil to identify which strip belongs to which pen.
4. Poke a pencil through one of the loops you tho made. Use the pencil to suspend the strip in a small glass or container.
5. Carefully add body of piss to the glass until it reaches the bottom of the paper strip just downstairs the ink dot. Be sure the ink stays higher up the water and the paper stays in the water.
6. Allow the water to soak up the strip and watch what happens to the ink drop.
7. If the ink you are streaking does non spread out, re-test it using abrasion alcohol.
8.
Repeat this process for each strip and compare your results.
9. let the strips dry and tape them on a sheet of paper as a record of the different pen types.
M3
Conclusion
From sounding at the results I obtained from the chromatography tests, I can tell the pen found was the pen used to write the suicide note. The test on the pen and the suicide note both matched indicating it was the selfsame(prenominal) pen used. However this on its own is not decisive evidence to indicate it was suicide the pen and suicide not should be both analysed for fingerprints so the person who wrote the document and used the pen can be identified.If you want to get a full essay, order it on our website: Orderessay
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