CHEMISTRY :
Chromatography
Sample Analysis INK-001:
- Corvina "91" (universal) -
| PROJECT CODE: |
04.101 |
| SECTION: |
CHROMATOGRAPHY |
| PROJECT TITLE: |
Analysis on Ink Sample 001 |
| RELEASE DATE: |
01 Jan 99 - 07 Feb 99 |
| LAST UPDATE: |
2 Sep 2009 |
| VERSION HISTORY: |
1.0 - First release
1.1 - ? (20 Feb 1999)
1.2 - Revision of text and formatting. (2-Sep-2009)
|
SAMPLE INFORMATION
| Source |
Ball-Point ('Biro') Ink |
Sample Description or
Commercial Name |
Corvina "91" Universal |
| Sample Colour |
Dark Blue |
| Solvents Tested |
65% Methanol
60% Ethanol
60% Methanoic Acid
60% Propanone
Absolute TetrachloroMethane
Absolute Chloroform
Absolute Butanol
|
 |
RESULTS
| Rank |
Solvent Name |
No of Separated Dyes |
Zones formation |
Pattern Description |
Picture |
| 1 |
65% Methanol |
2 |
Oval Zones |
up: Violet
low: Cyan |
no |
| 2 |
60% Ethanol |
2 |
Round Zones |
up: Violet
low: Cyan |
no |
| 3 * |
60% Methanoic Acid |
2 |
Round Zones |
up: Violet
low: Cyan |
YES |
| 4 |
60% Propanone |
2 |
Round Zones |
up: Violet
low: Cyan |
no |
| 5 * |
100% TetrachloroMethane |
2 |
Flame like streak from PA |
tip + border of streak: Cyan
lower + central area: Violet |
YES |
| 6 |
100% Chloroform |
No Separation |
Long Streak |
Blue (x) |
no |
| 7 |
100% Butanol |
No Separation |
SemiCircle T |
Blue (x) |
no |
LEGEND : (See picture for diagramatic representation)
- O - Separated - sample components separated into distinct circular-oval zones well spaced apart.
- B - Semi separated - sample components exhibits themselves as zones intersecting into each other.
- U - No Separation - sample forms an elongated streak usually from origin.
- T - No Separation - sample moves with solvent front forming a flat edge with level of solvent.
- X - No Separation - sample undissolved and remains at the original point of application.
- PA - Point of Application (Origin)
- * - Further remarks and details below.
FURTHER NOTES:
* 03: 60% Methanoic Acid.
This made the dye zones turn to a green colour on the strip, which
after drying, they turned to their original violet + cyan colour.
When some of this ink was mixed and dissolved in some acid in a test tube, a light green solution was formed.
* 05: 100% TetraChloroMethane
This produced a flame-like streak, about 30% long of the paper strip with the solvent level much higher (about 85% of the strip length). This streak was formed from the point of application.
The main interesting feature is that this is the only solvent which
formed the cyan colour above the violet colour.
CONCLUSION
Ink in Sample INK01 - "Corvina 91" consists of two dyes:
- FAST VIOLET-01 - (approx: 60%)
- SKYBLUE-01 - (approx: 40%)
Names given to the dyes above are not the actual scientific names but nicknamed by me for reference in these documents. Further reaserch will perhaps reveal their proper names, but it is difficult to identify the actual dyes.
Quantities by sight estimation of the separated dye zones on the chromatography papaer.
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