قارن الطرق

	إعادة البلورة	كروماتوغرافيا العمود	كروماتوغرافيا الطبقة الرقيقة
المجال	الكيمياء	الكيمياء	الكيمياء
العائلة	Process / pipeline	Process / pipeline	Process / pipeline
سنة النشأة	early 19th century	1903	1956
صاحب الطريقة	Organic chemistry tradition	Mikhail Tsvet	Egon Stahl
النوع	Purification technique	Chromatographic separation technique	Chromatographic separation technique
المصدر التأسيسي	Pavia, D. L., Lampman, G. M., Kriz, G. S., & Engel, R. G. (2014). A Small-Scale Approach to Organic Laboratory Techniques (4th ed.). Cengage Learning. ISBN: 978-1285749297	Skoog, D. A., Holler, F. J., & Crouch, S. R. (2017). Principles of Instrumental Analysis (7th ed.). Cengage Learning. ISBN: 978-1305577213	Sherma, J. (2003). Planar Chromatography. Analytical Chemistry, 75(12), 2783–2811.
الأسماء البديلة	crystallization purification, recrystallisation	liquid chromatography, column liquid chromatography	TLC, planar chromatography
ذات صلة	3	3	3
الملخص	Recrystallization is a classical purification technique in which a solid compound is dissolved in hot solvent, then allowed to crystallize upon cooling, yielding pure crystals while impurities remain in solution. Practiced for centuries in chemistry laboratories, recrystallization remains one of the most effective and accessible methods for purifying organic solids, especially when the target compound has low solubility at low temperatures.	Column chromatography is a liquid separation technique in which a stationary phase (typically silica gel or alumina) is packed into a vertical column, and a mobile phase (solvent) percolates through it to separate mixture components. Pioneered by Mikhail Tsvet in 1903, column chromatography remains the workhorse of organic chemistry laboratories for purifying reaction products and isolating target compounds.	Thin-Layer Chromatography (TLC) is a planar chromatographic technique that separates compounds based on their differential affinities for a mobile and stationary phase. Developed by Egon Stahl in 1956, TLC remains one of the most accessible and widely used analytical methods in organic and inorganic chemistry, laboratories, and quality control.