Chromatogr., 319, 1985, 131-142. umn class: Standard polar; Column type: Capillary; CAS no: 71363; Active phase: BP-20; Data type: Kovats RI; Authors: SGE, Guide to GC column selection, 2005. umn class: Standard polar; Column diameter: 0.32 mm; Column length: 25 m; Column type: Capillary; Start T: 100 C; CAS no: 71363; Active phase: OV-351; Carrier gas: N2; Data type: Kovats RI; Authors: Haken, J.K.; Korhonen, I.O.O., Gas chromatography of homologous esters. Chem. Polar Molecule A molecule in which the bond dipoles present do not cancel each other out and thus results in a molecular dipole. ; Shaw, P.E. Inhibition of intercellular communication is an important feature in the tumor promotion phase of a multistage carcinogenesis model. Food Sci., 55(1), 1990, 176-180. ass: Standard polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Heat rate: 1.8 K/min; Start T: 35 C; End T: 220 C; End time: 10 min; Start time: 10 min; CAS no: 71363; Active phase: ZB-Wax; Carrier gas: He; Phase thickness: 0.15 um; Data type: Linear RI; Authors: Ledauphin, J.; Saint-Clair, J.-F.; Lablanquie, O.; Guichard, H.; Founier, N.; Guichard, E.; Barillier, D., Identification of trace volatile compounds in freshly distilled calvados and cognac using preparative separations coupled with gas chromatography-mass spectrometry, J. Agric. Food Chem., 52, 2004, 1357-1363. ass: Standard polar; Column type: Capillary; CAS no: 71363; Active phase: Carbowax 20M; Data type: Normal alkane RI; Authors: Vinogradov, B.A., Production, composition, properties and application of essential oils, 2004. ass: Standard polar; Column type: Capillary; CAS no: 71363; Active phase: Polyethylene Glycol; Data type: Normal alkane RI; Authors: Zenkevich, I.G. ; Samusenko, A.L., Gas-chromatographic method of evaluation of n-alkanol ability for self-association in pure liquid, Russ. ; Garcia-Munoz, J.; Menendez, V.; Molera, M.J.; Santiuste, J.M. - Chrom. ; Lelieveld, J., Comprehensive two-dimensional gas chromatography (GC*GC) measurements of volatile organic compounds in the atmosphere, Atmos. Retention increments of C1-C18 primary alkanols and their 2-chloropropanoyl and 3-chloropropanoyl derivatives on SE-30 and OV-351 capillary columns, J. Molecular Formula CHN. CH2O is a polar molecule. Bot., 29, 1981, 195-208. class: Standard polar; Column diameter: 0.32 mm; Column length: 30 m; Column type: Capillary; Description: 60C (3min) => 2C/min => 220C => 3C/min =>245C (20min); CAS no: 71363; Active phase: DB-Wax; Carrier gas: H2; Phase thickness: 0.5 um; Data type: Linear RI; Authors: Nurgel, C.; Erten, H.; Canbas, A.; Cabaroglu, T.; Selli, S., Contribution by Saccharomyces cerevisiae yeasts to fermentation and flavour compounds in wines from cv. Food Chem., 53, 2005, 8881-8895. class: Standard polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Description: 20C(30s) =>fast=>60C =>4C/min => 220C (20min); CAS no: 71363; Active phase: DB-Wax; Phase thickness: 0.25 um; Data type: Linear RI; Authors: Cantergiani, E.; Brevard, H.; Krebs, Y.; Feria-Morales, A.; Amado, R.; Yeretzian, C., Characterisation of the aroma of green Mexican coffee and identification of mouldy/earthy defect, Eur. It it produced in small amounts in humans by the gut microbes. ). Khim., 7, 1974, 1519-1521, In original 1599-1601. umn class: Semi-standard non-polar; Column diameter: 0.01 in; Column length: 100 m; Column type: Capillary; Start T: 120 C; CAS no: 71363; Active phase: Apiezon L; Carrier gas: N2; Data type: Kovats RI; Authors: Agrawal, B.B. Ethylene (C2H4) is nonpolar in nature because of the symmetrical (linear) geometrical shape. Akad. ; Weskett R.; Volz, R.K.; Gardiner, S.E. ; Garbuzov, V.G., Effect of heteroatom in aliphatic sulfur- and oxygen-containing compounds on the values of the retention indices in gas chromatography, Izv. ; Kuz'menko, T.e. Molecules with less than eight electrons; an example is the BF3. The Oxygen is tetrahedral electron geometry and bent molecular geometry. ; Chambers, E., IV, Volatile Flavor Components of Breads Made from Hard Red Winter Wheat and Hard White Winter Wheat, Cereal Chem., 72(3), 1995, 237-242. ass: Standard polar; Column diameter: 0.2 mm; Column length: 25 m; Column type: Capillary; Heat rate: 3 K/min; Start T: 70 C; End T: 180 C; Start time: 5 min; CAS no: 71363; Active phase: BP-20; Data type: Normal alkane RI; Authors: MacLeod, A.J. automation tool comparison. ; Ding, S.F., Prediction of rentention idexes. ; Larsen, T.O., Prediction of Penicillium expansum Spoilage and Patulin Concentration in Apples Used for Apple Juice Production by Electronic Nose Analysis, J. Agric. Toxicol., 65(1), 2000, 34-39. ass: Standard polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Heat rate: 3 K/min; Start T: 50 C; End T: 180 C; End time: 40 min; CAS no: 71363; Active phase: DB-Wax; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Lee, K.-G.; Shibamoto, T., Antioxidant properties of aroma compounds isolated from soybeans and mung beans, J. Agric. Butane (C4H10) is a non-polar molecule. ; Samusenko, A.L. Retention increments of C1-C18 primary alkanols and their 2-chloropropanoyl and 3-chloropropanoyl derivatives on SE-30 and OV-351 capillary columns, J. ; Yang, Z.C. ; Webb, A.D., Identification of Some Volatile Compounds of Wine of Vitis Vinifera Cultivar Pinot Noir, Am. Food Chem., 40(4), 1992, 599-603. ass: Standard polar; Column length: 3.05 m; Column type: Capillary; Heat rate: 8 K/min; Start T: 40 C; End T: 200 C; End time: 60 min; CAS no: 71363; Active phase: Carbowax 20M; Data type: Linear RI; Authors: Peng, C.T., A method for tentative identificatoin of unknown gas chromatographic peaks by retention index, J. Radioanal. Sci., 71(4), 2002, 517-525. ass: Standard polar; Column diameter: 0.25 mm; Column length: 60 m; Column type: Capillary; Heat rate: 3 K/min; Start T: 60 C; End T: 180 C; Start time: 4 min; CAS no: 71363; Active phase: DB-Wax; Data type: Normal alkane RI; Authors: Ito, Y.; Sugimoto, A.; Kakuda, T.; Kubota, K., Identification of potent odorants in Chinese jasmine green tea scented with flowers of Jasminum sambac, J. Agric. To determine if a molecule is polar or nonpolar, it is frequently useful to look at Lewis structures. ; Shea, S.R. A, 1216, 2009, 1630-1639. umn class: Standard non-polar; Column type: Capillary; Start T: 120 C; CAS no: 71363; Active phase: Methyl Silicone; Data type: Normal alkane RI; Authors: Lebron-Aguilar, R.; Quintanilla-Lopez, J.E. Food Chem., 41(10), 1993, 1664-1668. ass: Standard non-polar; Column diameter: 0.32 mm; Column length: 50 m; Column type: Capillary; Heat rate: 5 K/min; Start T: 65 C; End T: 280 C; End time: 30 min; Start time: 10 min; CAS no: 71363; Active phase: CP Sil 5 CB; Carrier gas: He; Phase thickness: 0.4 um; Data type: Normal alkane RI; Authors: Joulain, D.; Casazza, A.; Laurent, R.; Portier, D.; Guillamon, N.; Pandya, R.; Le, M.; Viljoen, A., Volatile flavor constituents of fruits from Southern Africa: mobola plum (Parinari curatellifolia), J. Agric. Akad. ; Tesarik, K.; Janak, J., Gas chromatographic characterization of sulphur compounds in the 93-162 gasoline cut from Romashkino crude oil using Kovats retention indices, J. ; Pertierra-Rimada, E., Mixed stationary phases in gas-liquid chromatography. Short-chain alcohols like methanol, propanol, and ethanol are miscible in water. Gerichtl. There are four isomeric alcohols of formula C4H10O . Sci., 70(1), 2005, c13-c20. Food Chem., 49, 2001, 5929-5933. class: Semi-standard non-polar; Column diameter: 0.32 mm; Column length: 60 m; Column type: Capillary; Description: -30C(1min)=>100C/min=>40C(4min)=>2C/min=>90C=>4C/min=>130C=>8C/min=>250C; CAS no: 71363; Active phase: BPX-5; Carrier gas: He; Phase thickness: 1 um; Data type: Normal alkane RI; Authors: van Ruth, S.M. ; Pegg, R.B. Food Chem., 53, 2005, 2616-2622. class: Standard polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Description: 35C(5min)=>3C/min=>150C => 5C/min => 250C (10min); CAS no: 71363; Active phase: SOLGel-Wax; Carrier gas: He; Phase thickness: 0.25 um; Data type: Linear RI; Authors: Aubert, C.; Baumann, S.; Arguel, H., Optimization of the Analysis of Flavor Volatile Compounds by Liquid-Liquid Microextraction (LLME). J., 81, 2005, 184-190. umn class: Standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Start T: 30 C; CAS no: 71363; Active phase: HP-1; Phase thickness: 0.25 um; Data type: Kovats RI; Authors: Wang, Y.; Liu, J.; Li, N.; Shi, G.; Jiang, G.; Ma, W., Preliminary study of the retention behavior for different compounds using cryogenic chromatography at different initial temperatures, Microchem. ; Rhee, M.S. I want to find a suitable chromatographic column, the capillary column and filling column are all possible.Full separation, sea friends who have experienced analysis experience, thank you By contrast, a polar molecule consists of lone pairs of electrons on a central atom and therefore has unequal sharing of electrons. Examples of polar bond exist in water, ammonia, hydrochloric acid, etc. C4H10Og+6O2g4CO2g+5H2Og The rate of disappearance of C4H10O is 0 . ; Yamaguchi, M., Gas chromatographic retention as identification criteria, Anal. Calcul des coefficients d'activite relatifs et des indices de retention de quelques alcools aliphatiques, Bull. However, there are always exceptions. Technol. Electronegative atoms can also give polarity to a molecule. ; Flanagan, R.J., Detection and Identification of Volatile Organic Compounds in Blood by Headspace Gas Chromatography as an Aid to the Diagnosis of Solvent Abuse, J. Food Chem., 57, 2009, 7953-7961. ass: Standard polar; Column diameter: 0.25 mm; Column length: 60 m; Column type: Capillary; Heat rate: 3 K/min; Start T: 80 C; End T: 240 C; CAS no: 71363; Active phase: TC-Wax; Data type: Normal alkane RI; Authors: Miyazawa, M.; Yamafuji, C.; Kurose, K.; Ishikawa, Y., Volatile components of the rhizomes of Cirsium japonicum DC, Flavour Fragr. (Engl. umn class: Standard non-polar; Column length: 12 ft; Column type: Packed; Start T: 150 C; CAS no: 71363; Active phase: SE-30; Substrate: Celaton (62-72 mesh); Data type: Kovats RI; Authors: Ashes, J.R.; Haken, J.K., Gas chromatography of homologous esters. Chem., 55(8), 1983, 1331-1335, In original 1331-1335. umn class: Semi-standard non-polar; Column length: 1 m; Column type: Packed; Start T: 100 C; CAS no: 71363; Active phase: Squalane; Data type: Kovats RI; Authors: Grobler, A.; Balizs, G., Investigations on mixed gas chromatographic stationary phases. The electronegativity difference is greater than 0.4 between bonded atoms. Fr., Food Chem., 92, 2005, 221-226. ass: Standard polar; Column diameter: 0.20 mm; Column length: 50 m; Column type: Capillary; Heat rate: 3 K/min; Start T: 40 C; End T: 180 C; End time: 30 min; Start time: 5 min; CAS no: 71363; Active phase: PEG-20M; Phase thickness: 0.20 um; Data type: Normal alkane RI; Authors: Narain, N.; Almeida, J.N. Hydrocarbon liquids, such as gasoline and toluene. ; Korolenko, L.I. III. Food Chem., 41(9), 1993, 1413-1420. ass: Standard polar; Column diameter: 0.25 mm; Column length: 60 m; Column type: Capillary; Heat rate: 3 K/min; Start T: 50 C; End T: 200 C; End time: 40 min; CAS no: 71363; Active phase: DB-Wax; Carrier gas: He; Phase thickness: 1 um; Data type: Normal alkane RI; Authors: Horiuchi, M.; Umano, K.; Shibamoto, T., Analysis of volatile compounds formed from fish oil heated with cysteine and trimethylamine oxide, J. Agric. This allows n-pentane to be liquid at room temperature. Chromatogr., 586, 1991, 113-129. ass: Standard polar; Column diameter: 0.31 mm; Column length: 25 m; Column type: Capillary; Heat rate: 2 K/min; Start T: 50 C; End T: 200 C; CAS no: 71363; Active phase: Carbowax 20M; Data type: Linear RI; Authors: Suarez, M.; Duque, C., Volatile constituents of lulo (Salanum vestissimum D.) fruit, J. Agric. Food Agric., 80, 2000, 311-324. class: Standard polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Description: 50C(4min)=>4C/min=>130C=>1C/min => 190C => 4C/min =>220C(20min); CAS no: 71363; Active phase: DB-Wax; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Mayorga, H.; Knapp, H.; Winterhalter, P.; Duque, C., Glycosidically bound flavor compounds of cape gooseberry (Physalis peruviana L.), J. Agric. Chromatogr., 454, 1988, 129-143. umn class: Standard non-polar; Column length: 1.5 m; Column type: Packed; Start T: 120 C; CAS no: 71363; Active phase: OV-1; Carrier gas: N2; Data type: Kovats RI; Authors: Betts, T.J., Triangular Characterization of Gas Chromatographic Stationary Phases, J. Transl. J., 81, 2005, 184-190. umn class: Standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Start T: 20 C; CAS no: 71363; Active phase: HP-1; Phase thickness: 0.25 um; Data type: Kovats RI; Authors: Wang, Y.; Liu, J.; Li, N.; Shi, G.; Jiang, G.; Ma, W., Preliminary study of the retention behavior for different compounds using cryogenic chromatography at different initial temperatures, Microchem. J., 18, 2003, 15-17. ass: Standard polar; Column diameter: 0.25 mm; Column length: 60 m; Column type: Capillary; Heat rate: 4 K/min; Start T: 80 C; End T: 250 C; End time: 47 min; CAS no: 71363; Active phase: TC-Wax; Carrier gas: He; Data type: Normal alkane RI; Authors: Miyazawa, M.; Kurose, K.; Itoh, A.; Hiraoka, N., Comparison of the essential oils of Glehnia littoralis from Northern and Southern Japan, J. Agric.
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