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BY-NC-ND 3.0 license Open Access Published by De Gruyter Open Access March 23, 2012

Determination of polyolefin additives by reversed-phase liquid chromatography

  • M. Dopico-García EMAIL logo , Rosalía Noguerol-Cal , M. Castro-López , M. Cela-Pérez , Elena Piñón-Giz , Jose López-Vilariño and M. González-Rodríguez
From the journal Open Chemistry


This article examines the contribution of liquid chromatography to the study of polyolefin additives commonly used to obtain improved environmental resistance (antioxidants, ultraviolet light stabilizers, antistatics, and so on) and appearance enhancements (e.g. colorants). Several reversed-phase liquid chromatographic methods are summarized, and a detailed description of different detectors is provided. In addition, ways of applying these methods to analyse food contact materials and plastic toys are emphasized. Finally, the potential use of these methods is addressed which complies with European health safety regulations.

[1] P.S. Chum, K.W. Swogger, Prog. Polym. Sci. 33, 797 (2008) 10.1016/j.progpolymsci.2008.05.003Search in Google Scholar

[2] E. Reingruber, M. Himmelsbach, C. Sauer, W. Buchberger, Polym. Degrad. Stabil. 95(5), 740 (2010) 10.1016/j.polymdegradstab.2010.02.015Search in Google Scholar

[3] M. Tolinski, Additives for Polyolefins: Getting the Most Out of Polypropylene, Polyethylene and TPO (Plastics Design Library-Elsevier, USA, 2009) Search in Google Scholar

[4] W. Voigt, R. Todesco, Polym. Degrad. Stabil. 77, 397 (2002) 10.1016/S0141-3910(02)00089-7Search in Google Scholar

[5] R. Pfaendner, Polym. Degrad. Stabil. 91, 2249 (2006) 10.1016/j.polymdegradstab.2005.10.017Search in Google Scholar

[6] R. Ashby, In: R. Ashby, I. Cooper, S. Harvey, P. Tice (Eds.), Food Packaging and Legislation, (Pira International, Surrey-UK, 1997) 17 Search in Google Scholar

[7] European Commission Regulation (EU) No 10/2011 of 14 January 2011 on plastic materials and articles intended to come into contact with food. Off. J. Eur. Union L12, 1 (2011) Search in Google Scholar

[8] European Directive 2009/48/EC of the European Parliament and of the Council of 18 june 2009 on the safety of toys. Off. J. Eur. Union L170, 1 (2009) Search in Google Scholar

[9] European Regulation (EC) No 1907/2006 of the European Parliament and of the Council of 18 December 2006 concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), establishing a European Chemicals Agency, amending Directive 1999/45/EC and repealing Council Regulation (EEC) No 793/93 and Commission Regulation (EC) No 1488/94 as well as Council Directive 76/769/EEC and Commission Directives 91/155/EEC, 93/67/EEC, 93/105/EC and 2000/21/EC. Off. J. Eur. Union L396, 1 (2006) Search in Google Scholar

[10] F. Gugumus, N. Lelli, Polym. Degrad. Stabil. 72, 407 (2001) 10.1016/S0141-3910(01)00029-5Search in Google Scholar

[11] R. Gensler, C.J.G. Plummer, H.H. Kausch, E. Kramer, J.R. Pauquet, H. Zweifel, Polym. Degrad. Stabil. 67, 195 (2000) 10.1016/S0141-3910(99)00113-5Search in Google Scholar

[12] D.W. Allen, M.R. Chench, A. Crowson, D.A. Leathard, R. Saklatvala, J. Chromatogr. A 679, 285 (1994) 10.1016/0021-9673(94)80571-7Search in Google Scholar

[13] D.W. Allen, M.R. Chench, A. Crowson, D.A. Leathar, Polym. Degrad. Stabil. 39, 293 (1993) 10.1016/0141-3910(93)90004-3Search in Google Scholar

[14] D.W. Allen, D.A. Leathard, C. Smith, Radiat. Phys. Chem. 38(5), 461 (1991) 10.1016/1359-0197(91)90062-7Search in Google Scholar

[15] D.W. Allen, M.R. Chench, A. Crowson, D.A. Leathard, J. Chromatogr. 629, 283 (1993) 10.1016/0021-9673(93)87042-KSearch in Google Scholar

[16] I. Kriston, G. Pénzes, G. Szijjártó, P. Szabó, P. Staniek, E. Földes, B. Pukánsky, Polym. Degrad. Stabil. 95(9), 1883 (2010) 10.1016/j.polymdegradstab.2010.04.017Search in Google Scholar

[17] M. Bertoldo, F. Ciardelli, Polymer 45, 8751 (2004) 10.1016/j.polymer.2004.10.044Search in Google Scholar

[18] H. El Mansouri, N. Yagoubi, D. Ferrier, Chromatographia 48(7/8), 491 (1998) 10.1007/BF02466639Search in Google Scholar

[19] R.C. Nielson, J. Liq. Chromatogr. 14, 503 (1991) 10.1080/01483919108049266Search in Google Scholar

[20] K. Yu, E. Block, M. Balogh, LC-GC 18(2), 162 (2000) Search in Google Scholar

[21] D. Marque, A. Feigembaun, D. Dainelli, A. Riquett, Food Addit. Contam. A 15(7), 831 (1998) 10.1080/02652039809374717Search in Google Scholar

[22] H.J. Vandenburg, A.A. Clifford, K.D. Bartle, S.A. Zhu, Anal. Chem. 70, 1943 (1998) 10.1021/ac9710902Search in Google Scholar

[23] H.C. Ashton, Angew. Makromol. Chem. 262, 9 (1998) 10.1002/(SICI)1522-9505(19981201)261-262:1<9::AID-APMC9>3.0.CO;2-WSearch in Google Scholar

[24] C.F. Vadakkoott, N.S. Yoginder, S.B. Ishwar, Angew. Makromol. Chem 113, 219 (1983) 10.1002/apmc.1983.051130119Search in Google Scholar

[25] M.A. Haney, W.A. Dark, J. Chromatogr. Sci. 18, 655 (1980) 10.1093/chromsci/18.12.655Search in Google Scholar

[26] D. Munteanu. A. Isfan, C. Isfan, I. Tincul, Chromatographia 23(1), 7 (1987) 10.1007/BF02310410Search in Google Scholar

[27] H. Nadejzda, K. Sigbritt, Analyst 124, 797 (1999) 10.1039/a809025dSearch in Google Scholar

[28] R.C. Nielson, J. Liq. Chromatogr. 16(7), 1625 (1993) 10.1080/00144940.1993.9938723Search in Google Scholar

[29] A.M. Pinto, L.T. Taylor, J. Chromatogr. A 811, 163 (1998) 10.1016/S0021-9673(98)00263-5Search in Google Scholar

[30] B. Marcatto, M. Vianello, J. Chromatogr. A 869, 285 (2000) 10.1016/S0021-9673(99)00940-1Search in Google Scholar

[31] P. Molander, K. Haugland, D.R. Hegna, E. Ommundsen, E. Lundanes, T. Greibrokk, J. Chromatogr. A 864, 103 (1999) 10.1016/S0021-9673(99)01006-7Search in Google Scholar

[32] T. Greibrokk, B.E. Berg, S. Hoffmann, H.R. Norli, Q. Ying, J. Liq. Chromatogr. 505, 283 (1990) 10.1016/S0021-9673(01)93086-9Search in Google Scholar

[33] I. Bruheim, P. Molander, E. Lundanes, T. Greibrokk, E. Ommundsen, J. High Resol. Chromatogr. 23(9), 525 (2000) 10.1002/1521-4168(20000901)23:9<525::AID-JHRC525>3.0.CO;2-NSearch in Google Scholar

[34] P. Molander, A. Holm, E. Lundanes, R. Hegna, Dag, E. Ommundsen, T. Greibrokk, Analyst 127, 892 (2002) 10.1039/b201651fSearch in Google Scholar

[35] D. Louden, A. Handley, E. Lenz, I. Sinclair, S. Taylor, I.D. Wilson, Anal. Bioanal. Chem. 373, 508 (2002) 10.1007/s00216-002-1249-3Search in Google Scholar

[36] C. Neri, S. Constanzi, M. Riva, R. Farris, R. Colombo, Polym. Degrad. Stabil. 49, 65 (1995) 10.1016/0141-3910(95)00057-SSearch in Google Scholar

[37] M.A. Farajzadeh, J.A. Jönsson, Anal. Chim. Acta 594, 75 (2007) 10.1016/j.aca.2007.05.014Search in Google Scholar PubMed

[38] L. Burman, A.C. Albertsson, J. Polym. Sci. Part A: Polym. Chem. 43, 4537 (2005) 10.1002/pola.20936Search in Google Scholar

[39] L. Qin-Bao, L. Bo, S. Huan, L. Xiao-Mei, J. Liq. Chromatogr. Relat. Technol. 34(9), 730 (2011) Search in Google Scholar

[40] A. De Paepe, B. Erlandsson, J. Ostelius, U. Gasslander, A. Arbin, J. Liq. Chromatogr. Relat. Technol. 29(11), 1541 (2006) 10.1080/10826070600675387Search in Google Scholar

[41] S. Green, S. Bai, M. Cheatham, R. Cong, W. Yau, J. Sep. Sci. 33(22), 3455 (2010) 10.1002/jssc.201000491Search in Google Scholar PubMed

[42] M. Himmelsbach, W. Buchberger, E. Reingruber, Polym. Degrad. Stabil. 94, 1213 (2009) 10.1016/j.polymdegradstab.2009.04.021Search in Google Scholar

[43] R.E. Duderstadt, S.M. Fischer, J. Chromatogr. A 1193, 70 (2008) 10.1016/j.chroma.2008.03.086Search in Google Scholar PubMed

[44] C. Block, L. Wynants, M. Kelchtermans, R. De Boer, F. Compernolle, Polym. Degrad. Stabil. 91, 3163 (2006) 10.1016/j.polymdegradstab.2006.07.015Search in Google Scholar

[45] J. Alin, M. Hakkarainen, J. Appl. Polym. Sci. 118(2), 1084 (2010) Search in Google Scholar

[46] R. Noguerol-Cal, J.M. López-Vilariño, M.V. González-Rodríguez, L.F. Barral-Losada, J. Sep. Sci. 30, 2452 (2007) 10.1002/jssc.200700157Search in Google Scholar PubMed

[47] D. Granda-Restrepo, E. Peralta, R. Troncoso-Rojas, H. Soto-Valdez, Int. Dairy J. 19, 481 (2009) 10.1016/j.idairyj.2009.01.002Search in Google Scholar

[48] C. Strandberg, A.C. Albertsson, J. Appl. Polym. Sci. 98, 2427 (2005) 10.1002/app.22435Search in Google Scholar

[49] M. Lundbäck, C. Strandberg, A.C. Albertsson, M.S. Hedenqvist, U.W. Gedde, Polym. Degrad. Stabil. 91, 1071 (2006) 10.1016/j.polymdegradstab.2005.07.010Search in Google Scholar

[50] M.S. Dopico-García, J.M. López-Vilariño, R. Bouza, M.J. Abad, E. González-Soto, M.V. González-Rodríguez, Anal. Chim. Acta 521, 179 (2004) 10.1016/j.aca.2004.05.087Search in Google Scholar

[51] M.S. Dopico-García, J.M. López-Vilariño, M.V. González-Rodríguez, J. Agric. Food Chem. 55, 3225 (2007) 10.1021/jf070102+Search in Google Scholar

[52] J.F. Schabron, V.J. Smith, J.L. Ware, J. Liq. Chromatogr. 5(4), 613 (1982) 10.1080/01483918208060573Search in Google Scholar

[53] J. Salafranca, J. Cacho, C. Nerín, J. High Resol. Chromatogr. 22(10), 553 (1999) 10.1002/(SICI)1521-4168(19991001)22:10<553::AID-JHRC553>3.0.CO;2-ESearch in Google Scholar

[54] P.J. Arpino, D. Dilettato, K. Nguyen, A. Bruchet, J. Liq. Chromatogr. 13, 5 (1990) 10.1002/jhrc.1240130103Search in Google Scholar

[55] A. Garrido, M.T. Tena, J. Chromatogr. A. 1099, 75 2005) 10.1016/j.chroma.2005.09.005Search in Google Scholar

[56] P. Cerruti, M. Malinconico, J. Rychly, L. Matisova-Rychla, C. Carfagna, Polym. Degrad. Stabil. 94, 2095 (2009) 10.1016/j.polymdegradstab.2009.07.023Search in Google Scholar

[57] C. Pouteau, P. Dole, B. Cathala, L. Averous, N. Boquillon, Polym. Degrad. Stabil. 81, 9 (2003) 10.1016/S0141-3910(03)00057-0Search in Google Scholar

[58] M.A. De Paoli, L.T. Furlan, Polym. Degrad. Stabil. 13, 129 (1985) 10.1016/0141-3910(85)90062-XSearch in Google Scholar

[59] B. Košíková, V. Demianová, M. Kačuráková, J. Appl. Polym. Sci. 47, 1065 (1993) 10.1002/app.1993.070470613Search in Google Scholar

[60] S. Al-malaika, H. Ashley, S. Issenhuth, J. Polym. Sci. Part A: Polym. Chem. 32, 3099 (1994) 10.1002/pola.1994.080321610Search in Google Scholar

[61] C. Wessling, T. Nielsen, A. Leufvén, Food Addit. Contam. 17, 713 (2000) 10.1080/02652030050083231Search in Google Scholar

[62] A.Z. Graciano-Verdugo, E. Peralta, H. González-Ríos, H. Soto-Valdez, Anal. Chim. Acta 557, 367 (2006) 10.1016/j.aca.2005.10.040Search in Google Scholar

[63] I. Sirò, E. Fenyvesi, L. Szente, B. De Meulenaer, F. Devlieghere, J. Orgovanyi, J. Senyi, J. Barta, Food Addit. Contam. 23, 845 (2006) 10.1080/02652030600699064Search in Google Scholar

[64] A.Z. Graciano-Verdugo, H. Soto-Valdez, E. Peralta, P. Cruz-Zárate, A.R. Islas-Rubio, S. Sánchez-Valdes, A. Sánchez-Escalante, N. González-Méndez, H. González-Ríos, Food Res. Int. 43, 1073 (2010) 10.1016/j.foodres.2010.01.019Search in Google Scholar

[65] D.M. Granda-Restrepo, H. Soto-Valdez, E. Peralta, R. Troncoso-Rojas, B. Vallejo-Córdoba, N. Gámez-Meza, A.Z. Graciano-Verdugo, Food Res. Int. 42, 1396 (2009) 10.1016/j.foodres.2009.07.007Search in Google Scholar

[66] C. Strandberg, A.C. Albertsson, J. Polym. Sci. Part A: Polym. Chem. 44, 1660 (2006) 10.1002/pola.21286Search in Google Scholar

[67] C. Wessling, T. Nielsen, A. Leufvén, Pack. Technol. Sci. 13, 19 (2000) 10.1002/(SICI)1099-1522(200001/02)13:1<19::AID-PTS492>3.0.CO;2-BSearch in Google Scholar

[68] S. Al-Malaika, S. Issenhuth, Polym. Degrad. Stabil. 65, 143 (1999) 10.1016/S0141-3910(99)00002-6Search in Google Scholar

[69] S. Al-Malaika, S. Issenhuth, Polymer 42, 2915 (2001) 10.1016/S0032-3861(00)00653-4Search in Google Scholar

[70] V. Lavelli, E. Pagliarini, R. Ambrosoli, B. Zanoni, Int. J. Food Sci. Tech. 44, 994 (2009) 10.1111/j.1365-2621.2008.01835.xSearch in Google Scholar

[71] C. Nerín, L. Tovar, J. Salafranca, J. Food Eng. 84, 313 (2008) 10.1016/j.jfoodeng.2007.05.027Search in Google Scholar

[72] M.S. Dopico-García, M.M. Castro-López, J.M. López-Vilariño, M.V. González-Rodríguez, P. Valentão, P.B. Andrade, S. García-Garabal, M.J. Abad, J. Appl. Polym. Sci. 119, 3553 (2011) 10.1002/app.33022Search in Google Scholar

[73] S. Jipa, T. Zaharescu, R. Setnescu, T. Setnescu, W.Y. Wayne, J.Q. Pau, Polymer 41, 6949 (2000) 10.1016/S0032-3861(00)00120-8Search in Google Scholar

[74] G. Pritchard, Plastics Additives (Rapra Market Report-Rapra Technology Limited, Shropshire, 2005) Search in Google Scholar

[75] H.J. Heller, H.R. Blattmann, Pure Appl. Chem. 36, 141 (1973) 10.1351/pac197336010141Search in Google Scholar

[76] F. Sevini, B. Marcato, J. Chromatogr. A 260, 507 (1983) 10.1016/0021-9673(83)80062-4Search in Google Scholar

[77] A. Caceres, F. Ysambert, J. Lopez, N. Marquez, Sep. Sci. Technol. 31, 2287 (1996) 10.1080/01496399608001047Search in Google Scholar

[78] L. Coulier, E.R. Kaal, M. Tienstra, T. Hankemeier, J. Chromatogr. A 1062, 227 (2005) 10.1016/j.chroma.2004.11.013Search in Google Scholar PubMed

[79] R. Noguerol-Cal, J.M. López-Vilariño, G. Fernández-Martínez, M.V. González-Rodríguez, L.F. Barral-Losada, J. Sep. Sci. 33, 2698 (2010) 10.1002/jssc.201000036Search in Google Scholar PubMed

[80] W. Freitag, J. Chromatogr. 450, 430 (1988) 10.1016/S0021-9673(01)83602-5Search in Google Scholar

[81] S.G. Gharfeh, J. Chromatogr. 389, 211 (1987) 10.1016/S0021-9673(01)94424-3Search in Google Scholar

[82] B. Marcato, C. Fantazzini, F. Sevini, J. Chromatogr. 553, 415 (1991) 10.1016/S0021-9673(01)88512-5Search in Google Scholar

[83] R Matuska, L. Preisler, J. Sedlar, J. Chromatogr. 606, 136 (1992) 10.1016/0021-9673(92)85267-WSearch in Google Scholar

[84] R. Trones, T. Andersen, T. Greibrokk, D.R. Hegna, J. Chromatogr. A 874, 65 (2000) 10.1016/S0021-9673(99)01326-6Search in Google Scholar

[85] T. Andersen, I.L. Skuland, A. Holm, R. Trones, T. Greibrokk, J. Chromatogr. A 1029, 49 (2004) 10.1016/j.chroma.2003.12.043Search in Google Scholar

[86] P. Sótonyi, A. Kovács, G. Volk, J. Járay, A. Benko, J. Chromatogr. Sci. 42, 49 (2004) Search in Google Scholar

[87] H. Zweifel, Plastics Additives Handbook (Hanser Publishers, Munich, 2000) Search in Google Scholar

[88] CRODA. Polymer Additives. AtmerTM anti-static. Technical Data Sheet, Accessed 6/10.] ( Search in Google Scholar

[89] M.C. Grob, E. Minder, Plastics Addit. Compounding, 20 (1999) 10.1016/S1464-391X(99)80074-9Search in Google Scholar

[90] B. Nielsen, Congress “Addcon World 2006”, 1–8. Cologne (Germany, 2006) Search in Google Scholar

[91] J. Cross, Non Ionic Surfactants: Chemical Analisis (Marcel Dekker, NY, 1987) Search in Google Scholar

[92] J. Smidrkal, R. Cervenkova, V. Filip, Eur. J. Lipid Sci. Technol. 106, 851 (2004) 10.1002/ejlt.200401003Search in Google Scholar

[93] J. Giacometti, C. Milin, N. Wolf, F. Giacometti, J. Agric. Food Chem. 44, 3950 (1996) 10.1021/jf950314jSearch in Google Scholar

[94] Z. Wang, M. Fingas, J. High Resolution Chromatogr. 17, 15 (1994) 10.1002/jhrc.1240170104Search in Google Scholar

[95] Z. Wang, M. Fingas, J. High Resolution Chromatogr. 17, 85 (1994) 10.1002/jhrc.1240170208Search in Google Scholar

[96] M.V. González-Rodríguez, M.S. Dopico-García, R. Noguerol-Cal, T. Carballeira-Amarelo, J.M. López-Vilariño, G. Fernández-Martínez, J. Sep. Sci. 33, 3595 (2010) 10.1002/jssc.201000460Search in Google Scholar

[97] N. Garti, E. Wellner, A. Aserin, S. Sarig, JAOCS 60(6), 1151 (1983) 10.1007/BF02671346Search in Google Scholar

[98] K. Kato, P. Walde, N. Koine, Y. Imai, K. Akiyama, T. Sugahara, J. Dispersion Sci. Technol. 27, 1217 (2006) 10.1080/01932690600859903Search in Google Scholar

[99] M. Holcapek, P. Jandera, J. Fischer, B. Prokes, J. Chromatogr. A 858, 13 (1999) 10.1016/S0021-9673(99)00790-6Search in Google Scholar

[100] S.H. Chen, Y.J. Chuang, Anal. Chem. Acta 465, 145 (2002) 10.1016/S0003-2670(02)00095-8Search in Google Scholar

[101] A. Schaefer, T. Kuchler, T.J. Simat, H. Steinhart, J. Chromatogr. A 1017, 107 (2003) 10.1016/j.chroma.2003.08.004Search in Google Scholar

[102] L.H. Ahlstrom, C. Sparr, E. Bjorklund, Trends Anal. Chem. 24, 49 (2005) 10.1016/j.trac.2004.09.004Search in Google Scholar

[103] pr EN 71-9. Safety of toys. Part 9: Organic chemical compounds. Requirements (European Committee for Standardization, Brussels, February 2005) Search in Google Scholar

[104] pr EN 71-10. Safety of toys. Part 10: Organic chemical compounds. Sample preparation and extraction (European Committee for Standardization, Brussels, December 2005) Search in Google Scholar

[105] pr EN 71-11. Safety of toys. Part 11: Organic chemical compounds. Methods of analysis (European Committee for Standardization, Brussels, November 2005) Search in Google Scholar

[106] H.M. Pinheiro, E. Tourand, O. Thomas, Dyes Pigments 61, 121 (2004) 10.1016/j.dyepig.2003.10.009Search in Google Scholar

[107] G.M. Cramer, R.A. Ford, Food Cosmet. Toxicol. 16, 255 (1976) 10.1016/S0015-6264(76)80522-6Search in Google Scholar

[108] M.C. Garrigós, F. Reche, M.L. Marín, K. Pernías, A. Jiménez, J. Chromatogr. A 963, 427 (2002) 10.1016/S0021-9673(02)00548-4Search in Google Scholar

[109] R. Noguerol, J.M. López, G. Fernández, L. Barral, M.V. González, J. Chromatogr. A 1179, 152 (2008) 10.1016/j.chroma.2007.11.099Search in Google Scholar

[110] H.J. Vandenburg, A.A. Clifford, K.D. Bartle, J. Carroll, I. Newton, L.M. Garden, J.R. Dean, C.T. Costley, Analyst 122, 101 (1997) 10.1039/a704052kSearch in Google Scholar

[111] T. Macko, R. Siegl, K. Lederer, Angew. Makromol. Chem. 221(4021), 179 (1995) 10.1002/apmc.1995.052270116Search in Google Scholar

[112] G. Gillet, O. Vitrac, S. Desobry, J. Appl. Polym. Sci. 119(3), 1492 (2010) 10.1002/app.32950Search in Google Scholar

[113] M.J. Galotto, A. Torres, A. Guarda, N. Moraga, J. Romero, Food Res. Int. 44(2), 566 (2011) 10.1016/j.foodres.2010.12.009Search in Google Scholar

[114] A. Rittera, E. Michel, M. Schmid, S. Affolter, Polymer Testing 24, 498 (2005) 10.1016/j.polymertesting.2004.11.012Search in Google Scholar

[115] E. Torrieri, P.A. Carlino, S. Cavella, V. Fogliano, I. Attianese, G.G. Buonocore, P. Masi, J. Food Eng. 105, 429 (2011) 10.1016/j.jfoodeng.2011.02.038Search in Google Scholar

[116] S. Al-Malaika, S. Issenhuth, D. Burdick, Polym. Degrad. Stabil. 73, 491 (2001) 10.1016/S0141-3910(01)00137-9Search in Google Scholar

[117] S. Al-Malaika, C. Goodwin, S. Issenhuth, D. Burdick, Polym. Degrad. Stabil. 64, 145 (1999) 10.1016/S0141-3910(98)00187-6Search in Google Scholar

[118] J.A. Garde, R. Catalá, R. Vergara, Food Addit. Contam. Part A-Chem. 15(6), 701 (1998) 10.1080/02652039809374700Search in Google Scholar PubMed

[119] Y. Hirata, Y. Okamoto, J. Microcol. Sep. 1(1), 46 (1989) 10.1002/mcs.1220010111Search in Google Scholar

[120] W. Freitag, J. Oswaldo, Angew. Makromol. Chem. 175(2952), 181 (1990) 10.1002/apmc.1990.051750115Search in Google Scholar

[121] A. Garrido-López, I. Sancet, P. Montaño, R. González, M.T. Tena, J. Chromatogr. A 1175, 154 (2007) 10.1016/j.chroma.2007.10.045Search in Google Scholar PubMed

[122] M. Arias, I. Penichet, F. Ysambertt, R. Bauza, M. Zougagh, A. Rios, J. Supercrit. Fluids 50(1), 22 (2009) 10.1016/j.supflu.2009.04.012Search in Google Scholar

Published Online: 2012-3-23
Published in Print: 2012-6-1

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