Title
CHOICE 2: INK CHOMATOGRAPHY
Background Information and Research
1. Chromatography is an analytical methor or technique that serves mainly as a tool for the examination, separating and identifying mixtures of chemical substances that are or can be coloured.
2.check the presence of any contamination in the manufactured compounds h as medicine, Contaminants in rainwater
Analysis of narcotics
Detection of substances in urine http://en.wikipedia.org/wiki/Paper_chromatography http://www.chemguide.co.uk/analysis/chromatography/paper.html http://chem.wisc.edu/deptfiles/genchem/lab/labdocs/modules/paprchrom/paprchromdesc.htm
Purpose
The purpose of this experiment is to observe how chromatography can be used to separate …show more content…
mixtures of chemical substances
Materials
Four different markers (including one black permanent marker)
Rubbing alcohol or isopropyl alcohol
Coffee filters (2)
Tall glasses or plastic cups (2)
Pencil
Ruler
Tape
Table salt
Water
Measuring cups/spoons
Clean pitcher or 2-liter bottle.
computer
Procedure
.the first step of the method is to cut the coffee filter into a rectangle measuring three cm by nine cm, then repeat creating two strips. by using a pencil, i drew a line one cm (1/2 inch) from the edge of one end of one strip of paper dot the strip 4 times with a pencil and each dot with a diffrent color alo g the 0.5cm line, 1/4 inches apart. by using the marker, u will then mark each dot with a diffrent colored marker on the paper strips. wait for a moment and let it dry, then i went and go back to apply more colors on the dots. before doing the experiment i made preditions, educated guesses on the pigment componets i expect to seefrom each marker's ink. mix a 1/8 tablespoon salt solution and three cups of water in a 2- liter bottle. hake the solution, producing a 1% salt solution.
Pour the salt solution into a clean tall glass so that the liquid level is 1/4 inch (0.5 cm).
Tape the strip to a pencil and rest the pencil on top of the jar colored spots are not suppose to come in direct contact with the liquid in the bottom of the glass
When the salt water is 1/4 inch (0.5 cm) from the top edge of the paper, remove it from the
glass repeat steps 2-9 Data and Observations
⦁ List your original predictions about the expected pigment components of each candy color.
Color of Ink Distance of each Color Traveled (mm) Distance of each Solvent Traveled (mm)
Yellow 73 mm 114 mm
Pink 85 mm 114 mm
Red 104 mm 113 mm
Purple 116 mm 109 mm
Blue 114 mm 115 mm
Discussion and Conclusion: so in this lab report, five colors were being used to seperate rom the black inkwhich is yellow, pink, red, purple, and blue
The colors that were being used in this lab separated in this order, from top to bottom: blue, purple, red, pink, and then yellow from my results i can see that black ink is not just one simple color, but instead it is a mixture of several diffrent colors. so why were the inks separated. well because the black ink was a mixture of different pigments which i said earlier, and with different molecular characteristics. These different pigments allowed diffrent ratios from the absorbtion from the paper.
Possible errors from this lab could have been inaccurate measurements such as distances traveled by the inks and mistakes when calculating the ratio traveled by the water and colors
In conclusion, the proposed hypothesis was correct. The paper chromatography did show that black ink could be separated into various colors. The black ink gets its color from a mixture of various colored inks blended together. .