Chromatography色谱 Waiting for the paper to dry out completely,and then rotate it through 90,and develop the chromatogram again in a different solvent. SP2 Separated components Spots move with the second solvent. http://www.chemguide.co.uk/analysis/chromatography/paper.htmlChromatography Waiting for the paper to dry out completely, and then rotate it through 90 °, and develop the chromatogram again in a different solvent. 色谱 Separated components Spots move with the second solvent. http://www.chemguide.co.uk/analysis/chromatography/paper.html