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De Luca C, Buratti A, Krauke Y, Stephan S, Monks K, Brighenti V, Pellati F, Cavazzini A, Catani M, Felletti S. Investigating the effect of polarity of stationary and mobile phases on retention of cannabinoids in normal phase liquid chromatography. Anal Bioanal Chem 2022; 414:5385-5395. [PMID: 35146546 PMCID: PMC9242945 DOI: 10.1007/s00216-021-03862-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/10/2021] [Accepted: 12/20/2021] [Indexed: 12/14/2022]
Abstract
This work reports about a screening of four adsorbents with different polarity employed for the separation of the main phytocannabinoids contained in Cannabis sativa L., under normal phase liquid chromatography (NPLC). The effect of polarity and type of interaction mechanisms of the adsorbents (namely Si-, CN-, Diol-, and NH2-based SPs) on retention has been investigated under a variety of conditions either by using different combinations of apolar solvents (heptane or hexane) and alcohols (ethanol or isopropanol). The columns have also been employed for the separation of a real cannabis sample. Investigating the effect of polarity of stationary and mobile phases on retention of cannabinoids in normal phase liquid chromatography ![]()
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Affiliation(s)
- Chiara De Luca
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, via L. Borsari 46, 44121, Ferrara, Italy
| | - Alessandro Buratti
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, via L. Borsari 46, 44121, Ferrara, Italy
| | - Yannick Krauke
- KNAUER Wissenschaftliche Geräte GmbH, Hegauer Weg 38, 14163, Berlin, Germany
| | - Svea Stephan
- KNAUER Wissenschaftliche Geräte GmbH, Hegauer Weg 38, 14163, Berlin, Germany
| | - Kate Monks
- KNAUER Wissenschaftliche Geräte GmbH, Hegauer Weg 38, 14163, Berlin, Germany
| | - Virginia Brighenti
- Department of Life Sciences, University of Modena and Reggio Emilia, Via G. Campi 103, Modena, 41125, Italy
| | - Federica Pellati
- Department of Life Sciences, University of Modena and Reggio Emilia, Via G. Campi 103, Modena, 41125, Italy
| | - Alberto Cavazzini
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, via L. Borsari 46, 44121, Ferrara, Italy
| | - Martina Catani
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, via L. Borsari 46, 44121, Ferrara, Italy.
| | - Simona Felletti
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, via L. Borsari 46, 44121, Ferrara, Italy. .,KNAUER Wissenschaftliche Geräte GmbH, Hegauer Weg 38, 14163, Berlin, Germany.
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2
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Berlinck RGS, Crnkovic CM, Gubiani JR, Bernardi DI, Ióca LP, Quintana-Bulla JI. The isolation of water-soluble natural products - challenges, strategies and perspectives. Nat Prod Rep 2021; 39:596-669. [PMID: 34647117 DOI: 10.1039/d1np00037c] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Covering period: up to 2019Water-soluble natural products constitute a relevant group of secondary metabolites notably known for presenting potent biological activities. Examples are aminoglycosides, β-lactam antibiotics, saponins of both terrestrial and marine origin, and marine toxins. Although extensively investigated in the past, particularly during the golden age of antibiotics, hydrophilic fractions have been less scrutinized during the last few decades. This review addresses the possible reasons on why water-soluble metabolites are now under investigated and describes approaches and strategies for the isolation of these natural compounds. It presents examples of several classes of hydrosoluble natural products and how they have been isolated. Novel stationary phases and chromatography techniques are also reviewed, providing a perspective towards a renaissance in the investigation of water-soluble natural products.
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Affiliation(s)
- Roberto G S Berlinck
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil.
| | - Camila M Crnkovic
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, CEP 05508-000, São Paulo, SP, Brazil
| | - Juliana R Gubiani
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil.
| | - Darlon I Bernardi
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil.
| | - Laura P Ióca
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil.
| | - Jairo I Quintana-Bulla
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil.
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Wu D, Lucy CA. Study of the slope of the linear relationship between retention and mobile phase composition (Snyder-Soczewiñski model) in normal phase liquid chromatography with bonded and charge-transfer phases. J Chromatogr A 2016; 1475:31-40. [PMID: 27852455 DOI: 10.1016/j.chroma.2016.10.068] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 10/23/2016] [Accepted: 10/24/2016] [Indexed: 10/20/2022]
Abstract
The Snyder model and the Soczewiñski model are compared on classic NPLC bonded phases using literature data, and on the charge transfer 2, 4-dinitroanilinopropyl (DNAP) column using experimentally collected data. Overall, the Snyder model slightly better predicts the n-slope than the Soczewiñski model. However, both models give comparable uncertainty in predicting n-slope for a given compound. The number of aromatic double bonds was the most suitable descriptor for estimating the relative n-slope of PAHs, as it correlated with behavior better than the number of aromatic rings and is simpler to calculate than the solute adsorption area. On the DNAP phase, a modified Soczewiñski model is suggested to allow for the significant contribution of the aromatic rings to the n-slope. For classic NPLC bonded phases and DNAP columns, the contribution of polar group to the n-slope parallels the adsorption energy of each polar group.
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Affiliation(s)
- Di Wu
- Department of Chemistry, University of Alberta, Gunning/Lemieux Chemistry Centre, Edmonton, Alberta T6G 2G2 Canada
| | - Charles A Lucy
- Department of Chemistry, University of Alberta, Gunning/Lemieux Chemistry Centre, Edmonton, Alberta T6G 2G2 Canada.
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Milojković-Opsenica D, Majstorović H, Radoičić A, Tešič Ž. 3-Cyanopropylsiloxane-bonded silica gel: Characteristics and applications in thin-layer chromatography. JPC-J PLANAR CHROMAT 2015. [DOI: 10.1556/jpc.28.2015.2.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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5
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Poole CF. Stationary phases for packed-column supercritical fluid chromatography. J Chromatogr A 2012; 1250:157-71. [DOI: 10.1016/j.chroma.2011.12.040] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Revised: 12/11/2011] [Accepted: 12/12/2011] [Indexed: 10/14/2022]
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Nicolas G, Jankowski CK, Lucas-Lamouroux C, Bresson C. Development of normal phase-high performance liquid chromatography-atmospherical pressure chemical ionization-mass spectrometry method for the study of 6,6′-bis-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-benzo[1,2,4]-triazin-3-yl)-[2,2′]-bipyridine hydrolytic degradation. J Chromatogr A 2011; 1218:6369-78. [DOI: 10.1016/j.chroma.2011.07.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Revised: 06/16/2011] [Accepted: 07/01/2011] [Indexed: 10/18/2022]
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Optimization of normal-phase chromatographic separation of compounds with primary, secondary and tertiary amino groups. J Chromatogr A 2008; 1194:80-9. [PMID: 18479690 DOI: 10.1016/j.chroma.2008.04.052] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2008] [Revised: 04/07/2008] [Accepted: 04/10/2008] [Indexed: 11/21/2022]
Abstract
The retention behavior of primary, secondary and tertiary amines was studied using normal-phase-HPLC on silica, diol, and cyano stationary phases. Several classes of amines, including benzylamines, anilines, ephedrines, tryptamines, and azatryptamines were chromatographed using mixtures of hexane and ethoxynonafluorobutane with methylene chloride and methanol. Peak tailing, diminished selectivity and low plate count were minimized by the addition of volatile amines to the mobile phase. The optimal additive was n-propylamine at 0.1% concentration. On diol columns, the elution order of free primary, N-N-methyl, and N,N-dimethylamines was predictable, while the elution order of primary and secondary amines on cyano columns varied depending on the alcohol modifier concentration. The feasibility of preparative normal-phase chromatography was demonstrated by the separation of a mixture of primary, secondary and tertiary amines obtained by direct methylation of norephedrine. The procedures described may provide a practical alternative to traditional methods of analysis and purification of potential drug candidates.
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Hsu LC. Reversed-Phase Ion-Pair Liquid Chromatography of a Pharmaceutical Compound and Its Photolytically Transformed Isomer. J LIQ CHROMATOGR R T 2006. [DOI: 10.1080/10826079808001252] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- L. C. Hsu
- a Environmental Research Laboratory SmithKline Beecham Pharmaceuticals King of Prussia , PA, 19406
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In situ adsorption studies at silica/solution interfaces by attenuated total internal reflection fourier transform infrared spectroscopy: examination of adsorption models in normal-phase liquid chromatography. Anal Chem 2000; 72:1543-54. [PMID: 10763251 DOI: 10.1021/ac990968h] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
ATR-FT-IR spectroscopy was employed to the study the adsorption of ethyl acetate and 2-propanol to the surface of thin silica sol-gel films in contact with n-heptane solutions. In situ vibrational spectra of silica-adsorbed species provided information regarding the mechanisms of solute retention and elution in normal-phase chromatography. Previous normal-phase chromatographic studies of ethyl acetate adsorption revealed nonlinear isotherms which were explained by both bilayer and adsorbate delocalization models. Infrared spectra of ethyl acetate at the silica surface versus concentration showed that nonlinear adsorption can be attributed to site heterogeneity, where adsorption to free silanols and surface-adsorbed water can be distinguished. Least-squares modeling of the data produced resolved spectra for the two sites and adsorption equilibrium constants that differed by about an order of magnitude. Adsorption of 2-propanol was best modeled by a single Langmuir isotherm showing no significant difference in adsorption energy for the two sites; 2-propanol was shown to easily displace ethyl acetate from the silica surface. Ethyl acetate could also displace 2-propanol from the silica, and least-squares modeling again revealed two-adsorbed-component spectra for ethyl acetate that were indistinguishable from spectra obtained when ethyl acetate adsorbed directly onto the surface.
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Okusa K, Tanaka H, Ohira M. Development of a new cyano-bonded column for high-performance liquid chromatography. J Chromatogr A 2000; 869:143-9. [PMID: 10720233 DOI: 10.1016/s0021-9673(99)00861-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A unique cyano-bonded column for high-performance liquid chromatography was developed by chemically bonding cyanopropyl groups to the silica gel support, and its chromatographic performance was described. Eight cyanopropyl-bonded silica gels were prepared under different conditions. These packing materials were packed into a stainless steel column, the chromatographic properties and durability of which were investigated in both normal- and reversed-phase partition modes. The separating selectivity and the durability of cyanopropyl-bonded silica (CN) columns were dependent on the preparation conditions. Particularly, the relationship between the density of cyanopropyl groups on the surface of the silica gel and the irreversible adsorption of basic compounds was examined. Also, the experimental results indicated that endcapping resulted in the poor separating selectivity and durability of the CN columns.
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Affiliation(s)
- K Okusa
- Department of Research and Development, GL Sciences, Iruma, Saitama, Japan.
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Li J, Robison T. Application of linear solvation energy relationships to guide selection of polar modifiers in normal-phase liquid chromatographic separations. Anal Chim Acta 1999. [DOI: 10.1016/s0003-2670(99)00268-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Yoshida T, Okada T. Peptide separation in normal-phase liquid chromatography. Study of selectivity and mobile phase effects on various columns. J Chromatogr A 1999; 840:1-9. [PMID: 10335608 DOI: 10.1016/s0021-9673(99)00223-x] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
An experimental procedure for peptide separation by normal-phase liquid chromatography (NPLC) was proposed in previous papers. In the present study, the chromatographic behavior of amino, cyano, amide, diol and silica columns, which have been used in non-aqueous NPLC, is investigated anew. The amino column was not appropriate for peptide separation because of poor recovery. The cyano column could not be used due to lack of retention. The amide, diol and silica columns were useful for peptide separation. The chromatograms on amide, diol and silica columns were a little different when the mobile phase composition was changed. The recovery of peptides was good: diol > amide > silica. Repeatability and reproducibility using amide, diol and silica columns was satisfactory.
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Affiliation(s)
- T Yoshida
- Tosoh Corporation, Nanyo Research Center, Yamaguchi, Japan
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14
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Philipsen HJA, Claessens HA, Bosman M, Klumperman B, German AL. Normal phase gradient polymer elution chromatography of polyester resins. Chromatographia 1998. [DOI: 10.1007/bf02467591] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Park JH, Yoon MH, Ryu YK, Kim BE, Ryu JW, Jang MD. Characterization of some normal-phase liquid chromatographic stationary phases based on linear solvation energy relationships. J Chromatogr A 1998. [DOI: 10.1016/s0021-9673(97)01022-4] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Wasiak W, Urbaniak W. Chemically bonded chelates as selective complexing sorbents for gas chromatography V. Silica chemically modified by Cu(II) complexes via amino groups. J Chromatogr A 1997. [DOI: 10.1016/s0021-9673(96)00683-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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17
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Carlsson H, Östman C. Retention mechanisms of polycylic aromatic nitrogen heterocyclics on bonded amino phases in normal-phase liquid chromatography. J Chromatogr A 1995. [DOI: 10.1016/0021-9673(95)00439-t] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Normal-phase high-performance liquid chromatography using enhanced-fluidity liquid mobile phases. J Chromatogr A 1995. [DOI: 10.1016/0021-9673(95)00250-q] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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19
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Normal-phase high-performance liquid chromatography of volatile compounds Selectivity and mobile phase effects on polar bonded silica. J Chromatogr A 1995. [DOI: 10.1016/0021-9673(94)01048-j] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Lübke M, Le Quéré JL, Barron D. Retention behaviour of volatile compounds in normal-phase high-performance liquid chromatography on a diol column. J Chromatogr A 1993. [DOI: 10.1016/0021-9673(93)83343-q] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Kord AS, Khaledi MG. Selectivity of organic solvents in micellar liquid chromatography of amino acids and peptides. J Chromatogr A 1993; 631:125-32. [PMID: 8450009 DOI: 10.1016/0021-9673(93)80512-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The influence of the type of organic modifiers on retention behavior in micellar liquid chromatography is studied. A group of amino acids and small peptides was used as the test mixture. It is shown that the chromatographic selectivities of 2-propanol, acetonitrile and tetrahydrofuran which belong to three different groups in Snyder's classification, are considerably similar in the presence of micelles for the test mixture. On the other hand, the selectivities of 2-propanol and butanol which belong to the same solvent selectivity group are different for these solutes in the micellar mobile phases.
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Affiliation(s)
- A S Kord
- Department of Chemistry, North Carolina State University, Raleigh 27695-8204
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Härtter S, Hiemke C. Column switching and high-performance liquid chromatography in the analysis of amitriptyline, nortriptyline and hydroxylated metabolites in human plasma or serum. JOURNAL OF CHROMATOGRAPHY 1992; 578:273-82. [PMID: 1400807 DOI: 10.1016/0378-4347(92)80426-q] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A column-switching system for the direct injection of plasma or serum samples, followed by isocratic high-performance liquid chromatography and ultraviolet detection, is described for the simultaneous quantitation of the tricyclic antidepressant amitriptyline, its demethylated metabolite nortriptyline and the E- and Z-isomers of 10-hydroxyamitriptyline and 10-hydroxynortriptyline. The method included adsorption of amitriptyline and metabolites on a reversed-phase C8 clean-up column (10 microns; 20 mm x 4.6 mm I.D.), washing of unwanted material to waste and, after on-line column-switching, separation on a cyanopropyl analytical column (5 microns; 250 mm x 4.6 mm I.D.). The compounds of interest were separated and eluted using acetonitrile-methanol-0.01 M phosphate buffer (pH 6.8) (578:188:235, v/v) within less than 20 min. Various drugs frequently co-administered with amitriptyline or other antidepressants did not interfere with the determinations. In plasma samples spiked with 25-300 ng/ml, the recoveries were between 84 and 112% and the inter-assay coefficients of variation were 3-11%. After a minor modification, as little as 5 ng/ml could be quantitated. There were linear correlations (r greater than 0.99) between drug concentrations of 5-500 ng/ml and the detector signal. The method allows routine measurements of amitriptyline, nortriptyline and hydroxylated metabolites in blood plasma or serum of patients treated with amitriptyline or nortriptyline, and enables the results to be reported within 1 h.
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Affiliation(s)
- S Härtter
- Department of Psychiatry, University of Mainz, Germany
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24
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Piretti MV, Doghieri P. Separation of peracetylated flavanoid and flavonoid polyphenols by normal-phase high-performance liquid chromatography on a cyano-silica column and their determination. J Chromatogr A 1990. [DOI: 10.1016/s0021-9673(01)89407-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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26
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Olsen L, Hurtubise R. Solvent composition effects on the retention characteristics of aromatic hydroxyl compounds with silica and polar mobile phases and interpretation by the snyder model. J Chromatogr A 1989. [DOI: 10.1016/s0021-9673(01)93928-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Olsen L, Hurtubise R. Mobile phase effects on aromatic hydroxyl compounds with an aminopropyl column and interpretation by the Snyder model. J Chromatogr A 1989. [DOI: 10.1016/s0021-9673(01)83312-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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Smith PL, Cooper WT. Extended solubility parameters and stationary phase selectivities of anino-, cyano- and diol-silica normal bonded-phase liquid chromatography columns. Chromatographia 1988. [DOI: 10.1007/bf02311528] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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