
1
12
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Characteristics of commonly used mobile phase
(Those in bold should not be employed)
Fire PointPolarity
E2(Al2O3)Viscosity
CP20deg-CRefractive
Index UV
Cut-off
(nm)
Flash
Point
(deg-C) (deg-C) Upper Lower
Vapor
Density Boiling
Point
(deg-C)
Gravity
Fluoroalkanes -0.25 1.25
n-Pentane 0.00 0.23 1.358 210 <-40 308.9 1.5 7.8 2.5 36.1 0.6
Hexane 0.00 1.375 210 -21.7 233.9 1.2 7.5 3.0 68.9 0.7
Isooctane 0.01 1.404 210
Petroleum ether 0.01 0.3 210
n-Decan 0.04 0.92 1.412 46.1 207.8 0.8 5.4 4.9 173.9 0.7
Cyclohexane 0.04 1.00 1.427 210 -20 260 1.3 82.9 81.7 0.8
Cyclopentane 0.05 0.47 1.406 210
Diisobutylene 0.06 1.411 210
i-Pentene 0.08 1.371 -17.8 272.8 1.5 8.7 2.4 30 0.7
Carbon disulfide 0.15 0.37 1.626 380 -30 100 1.3 44 2.6 46.1 1.3
Carbon tetrachloride 0.18 0.97 1.466 265
Amyl chloride 0.26 0.43 1.413 225 12.8 343.3 1.6 8.6 3.7 106.1 0.9
-9.4 460 1.8 10.1 3.2Busy chloride 0.26 1.436 220 o-17.2 463.9 1.6 6.0 144.4
0.62-0.8 to 1.50 m-25 527.8 1.1 7.0 3.78 138.9 0.9Xylene 0.26 290 p-25 528.9 1.1 7.0 138.3
i-Propyl ether 0.28 0.37 1.368 220 -27.8 443.3 1.4 21 3.5 68.9 0.7
i-Propyl chloride 0.29 0.33 1.378 225 -32.2 593.3 2.8 1037 2.7 35 0.9
Tolune 0.29 0.59 1.496 285 4.4 536.1 1.4 6.7 3.1 110.6 0.9
n-Propyl-chloride 0.30 0.35 1.389 225 <-17.8 2.6 11.1 2.7 46.1 0.9
Chlorobenzene 0.30 0.80 1.525 32.2 637.8 1.3 7.1 3.9 132.2 1.1
Benzene 0.32 0.65 1.501 280 -11.1 562.2 1.4 7.1 2.8 80 0.9
Ethyl bromide 0.37 1.424 511.1 6.7 11.3 3.8 37.8 1.4
Ethyl ether 0.38 0.23 1.353 220 -45 180 1.9 48 2.6 35 0.7
Ethyl sulfide 0.38 0.45 1.442 290
Chloroform 0.40 0.57 1.443 245
Methylene-chlolride 0.42 0.44 1.424 245 -50 518.9 3.8 15.4 2.2 38.5 0.9
Methyl I-butyl
ketone 0.43 1.394 330
Tetrahydrofurane 0.45 1.408 220 -14.4 321.1 211.8 2.5 66.1 0.9
Ethylen dichloride 0.49 0.79 1.445 230 13.3 412.3 6.2 16 3.4 83.9 1.3
Methyl ethyl
ketone 0.51 1.381 330 -6.1 515.6 1.8 10 2.5 80 0.8
i-Nitropropane 0.53 1.400 380 48.9 420.6 2.6 3.14 131.1 1.0
Acetone 0.56 0.32 1.359 220 -17.8 537.8 2.6 12.8 2.0 56.7 0.8
Dioxane 0.56 1.54 1.422 260 12.2 180 2.0 22 3.0 101.1 1.0
Ethyl acetate 0.58 0.45 1.370 260 4.4 460 1.8 83.5 90 0.9
Methyl acetate 0.60 0.37 1.362 210 -10 501.7 3.1 16 2.6 60 0.9
Amyl alcohol 0.61 4.1 1.410 32.8 300 1.2 10.0 3.0 137.8 0.8
Dimethyl sulfoxide 0.62 2.24
Aniline 0.62 4.4 1.586 70 617.2 1.3 3.2 184.4 1.0
Dimethyl amine 0.63 0.38 1.387 275 <-17.8 312.2 1.8 10.12.5 56.7 0.7
Nitromethane 0.64 0.67 1.394 380 35 418.3 7.3 2.1 101.1 1.1
Acetonitrile 0.65 0.37 1.344 210 5.6 1.4 81.7 0.8
Pyridine 0.71 0.94 1.510 305 20 1.8 12.4 2.7 115 1.0
Butyl cellosolve 0.74 220
i-Propanol
n-Propanol 0.82 2.3 1.38 210 11.7 398.9 2.0 12 2.1 82.8 0.8
Ethanol 0.88 1.20 1.361 210 12.8 422.8 4.3 19 1.6 78.3 0.8
Methanol 0.95 0.60 1.329 210 11.1 463.9 7.3 36 1.1 63.9 0.8
Ethylene glycol 1.11 19.9 1.427 210 111.1 412.8 3.2 197.2 1.1
Acetic acid large 1.26 1.372