Abstract
In modern ultra-high performance liquid chromatography set-ups, short columns (max. 10 cm) with a narrow ID (2.1 mm) packed with small, (sub-2 µm) fully or superficially porous particles are used. Since the volume and corresponding peak variance arising from these columns are very small, the dispersion contribution from the chromatographic system has a large effect on the overall separation performance. In gradient elution, the on-column focusing of the sample band at the start of the gradient results in the elimination of the pre-column band broadening. However, since gradient elution separations yield very narrow sample peaks at the outlet of the column, any post-column band broadening has a large effect on the obtained separation quality. In this contribution, the main factor of post-column band broadening is investigated, i.e., that from the UV detector, by comparing the peak width measured on capillary directly in front of the UV detector using an LIF detector and the peak widths obtained in the UV detector. These experiments show that there is a clear increase in peak variance with flow rate up to around 0.4–0.6 mL/min (depending on the investigated flow cell). It is found that modern low-dispersion flow cells generate a dispersion contribution around 0.7 µL2 at high flow rates, whereas standard flow cells can have a contribution up to 5.8 µL2. For the investigated nano-flow cell (80 nL), no significant dispersion was observed.
Similar content being viewed by others
References
De Vos J, Broeckhoven K, Eeltink S (2016) Advances in ultrahigh-pressure liquid chromatography technology and system design. Anal Chem 88:262–278
Broeckhoven K, Desmet G (2014) The future of UHPLC: Towards higher pressure and/or smaller particles? TrAC Trends Anal Chem 63:65–75
De Vos J, De Pra M, Desmet G, Swart R, Edge T, Steiner F, Eeltink S (2015) High-speed isocratic and gradient liquid-chromatography separations at 1500 bar. J Chromatogr A 1409:138–145
Broeckhoven K, De Vos J, Desmet G (2017) Particles, pressure, and system contribution: the holy trinity of ultrahigh-performance liquid chromatography. LC GC Eur 30:618–625
Majors RE (2015) Future needs of HPLC and UHPLC column technology. LCGC North Am 33:886–887
Fekete S, Guillarme D (2013) Kinetic evaluation of new generation of column packed with 1.3 µm core–shell particles. J Chromatogr A 1308:104–113
Sanchez AC, Friedlander G, Fekete S, Anspach J, Guillarme D, Chitty M, Farkas T (2013) Pushing the performance limits of reversed-phase ultra high performance liquid chromatography with 1.3 µm core–shell particles. J Chromatogr A 1311:90–97
Hupe K-P, Jonker RJ, Rozing G (1984) Determination of band-spreading effects in high-performance liquid chromatographic instruments. J Chromatogr 285:253–265
Fekete S, Fekete J (2011) The impact of extra-column band broadening on the chromatographic efficiency of 5 cm long narrow-bore very efficient columns. J Chromatogr A 1218:5286–5291
Vanderlinden K, Broeckhoven K, Vanderheyden Y, Desmet G (2016) Effect of pre- and post-column band broadening on the performance of high-speed chromatography columns under isocratic and gradient conditions. J Chromatogr A 1442:73–82
Dasgupta PK, Shelor CP, Kadjo AF, Kraiczek KG (2018) Flow-cell-induced dispersion in flow-through absorbance detection systems. True column effluent peak variance. Anal Chem 90:2063–2069
Cohen KA, Stuart JD (1987) A practical method to predict the effect of extra-column variance on observed efficiency in high performance liquid chromatography. J Chrom Sci 25:381–390
Yukuei Z, Miansheng B, Xiouzhen L, Peichang L (1980) High-performance liquid chromatographic columns of small diameter. J Chrom 197:97–108
DiCesare JL, Dong MW, Atwood JG (1981) Very-high-speed liquid chromatography: II. Some instrumental factors influencing performance. J Chrom 217:369–386
Kamahori M, Watanabe Y, Miura J, Taki M, Miyagi M (1989) High-sensitivity micro ultraviolet detector for high-performance liquid chromatography. J Chrom 465:227–232
Scott RPW, Kucera P (1979) Mode of operation and performance characteristics of microbore columns for use in liquid chromatography. J Chrom 169:51–72
Gritti F, Guiochon G (2011) On the minimization of the band-broadening contributions of a modern, very high pressure liquid chromatograph. J Chromatogr A 1218:4632–4648
Kraiczek KG, Rozing GP, Zengerle R (2013) Relation between chromatographic resolution and signal-to-Noise ratio in spectrophotometric HPLC detection. Anal Chem 85:4829–4835
Broeckhoven K, Vanderlinden K, Guillarme D, Desmet G (2018) On-tubing fluorescence measurements of the band broadening of contemporary injectors in ultra-high performance liquid chromatography. J Chromatogr A 1535:44–54
Kok WTh, Brinkman UATh, Frei RW, Hanekamp HB, Nooitgedacht F (1982) H.Poppe, Use of conventional instrumentation with microbore columns in high-performance liquid chromatography. J Chromatogr 237:357–369
Van Schoors J, Maes K, Van Wanseele Y, Broeckhoven K, Van Eeckhaut A (2016) Miniaturized ultra-high performance liquid chromatography coupled to electrochemical detection: Investigation of system performance for neurochemical analysis. J Chromatogr A 1427:69–78
Spaggiari D, Fekete S, Eugster PJ, Veuthey J-L, Geiser L, Rudaz S, Guillarme D (2013) Contribution of various types of liquid chromatography–mass spectrometry instruments to band broadening in fast analysis. J Chromatogr A 1301:45–55
https://www.agilent.com/cs/library/usermanuals/public/G4212-90122_TN_for_Flowcell.pdf, retrieved on 10/07/2018
Raikar US, Renuka CG, Nadaf YF, Mulimani BG, Karguppikar AM, Soudagar MK (2006) Solvent effects on the absorption and fluorescence spectra of coumarins 6 and 7 molecules: Determination of ground and excited state dipole moment. Spectrochim Acta Part A Mol Biomol Spectrosc 65:673–677
Vanderheyden Y, Broeckhoven K, Desmet G (2014) Comparison and optimization of different peak integration methods to determine the variance of unretained and extra-column peaks. J Chromatogr A 1364:140–150
Broeckhoven K, Desmet G (2007) Approximate transient and long time limit solutions for the band broadening induced by the thin sidewall-layer in liquid chromatography columns. J Chromatogr A 1172:25–39
Broeckhoven K, Desmet G (2009) Numerical and analytical solutions for the column length dependent band broadening originating from axisymmetrical trans-column velocity gradients. J Chromatogr A 1216:1325–1337
Funding
This study was funded by a Research Grant from FWO Vlaanderen (1520115N) to KB.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
The authors declare that they have no conflict of interest.
Human and animal rights
This article does not contain any studies with human participants or animals performed by any of the authors.
Additional information
Published in the topical collection Rising Stars in Separation Science, as part of Chromatographia’s 50th Anniversary Commemorative Issue.
Rights and permissions
About this article
Cite this article
Vanderlinden, K., Desmet, G. & Broeckhoven, K. Measurement of the Band Broadening of UV Detectors used in Ultra-high Performance Liquid Chromatography using an On-tubing Fluorescence Detector. Chromatographia 82, 489–498 (2019). https://doi.org/10.1007/s10337-018-3622-1
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10337-018-3622-1