Separation techniques: Chromatography
North Clin Istanb. 2016; 3(2): 156–160.
Published online 2016 Nov 11. doi: 10.14744/nci.2016.32757
Chromatography is an important biophysical technique that enables the separation, identification, and purification of the components of a mixture for qualitative and quantitative analysis.
Chromatography is based on the principle where molecules in mixture applied onto the surface or into the solid, and fluid stationary phase (stable phase) is separating from each other while moving with the aid of a mobile phase. The factors effective on this separation process include molecular characteristics related to adsorption (liquid-solid), partition (liquid-solid), and affinity or differences among their molecular weights. Because of these differences, some components of the mixture stay longer in the stationary phase, and they move slowly in the chromatography system, while others pass rapidly into mobile phase, and leave the system faster.
Journal of Criminal Law and Criminology (1955)
Volume 45 | Issue 4 | Article 14
POLICE SCIENCE
Identification of liquid writing inks by paper chromatography marks the most important step in the field of ink identification in recent times.
With relatively simple means, most inks can be differentiated and much can be ascertained rapidly regarding their composition. The dyes become visible individually, and with ultraviolet light and chemical testing, invisible constituents can be located on the paper.
PERSONAL USE OF CHROMATOGRAPHY
Wayne Benda, Model Train Journal, 9/14/2021,
FOUNTAIN PEN and BOTTLED INK COLLECTING
Allows the collector an easy way to see what dyes were used to achieve the color of the ink. If the collector keeps a chromatographic record of his inks and looses track of which ink is in a fountain pen (or bottle in the case of Diamine ink) he can easily identify the unknown ink by running a chromatograph on the unknown ink.