1
|
Mumcu A. A different approach to the quantification of human seminal plasma metabolites using high-resolution NMR spectroscopy. J Pharm Biomed Anal 2023; 229:115356. [PMID: 37011551 DOI: 10.1016/j.jpba.2023.115356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 03/20/2023] [Accepted: 03/21/2023] [Indexed: 04/03/2023]
Abstract
In this study, a reliable method was established for the absolute quantification of metabolite concentrations in human seminal plasma using ERETIC2, a quantification tool developed by Bruker based on the PULCON principle. The performance of the ERETIC2 was examined using an AVANCE III HD NMR spectrometer (600 MHz) equipped with a triple inverse 1.7 mm TXI probe in terms of some experimental parameters that may affect the accuracy and precision of the quantitative results. Then, the accuracy, precision, and repeatibility of ERETIC2 were determined using L-asparagine solutions at different concentrations. And it was evaluated by comparing it with the classical internal standard (IS) quantification method. The relative standard deviation (RSD) values for ERETIC2 were calculated in the range of 0.55-1.90% and the minimum recovery value was 99.9%, while the RSD values for the IS method were calculated in the range of 0.88-5.83% and recovery value was minimum 91.0%. Besides, the RSD values of the inter-day precisions for the ERETIC2 and IS methods were obtained to be in the range of 1.25 - 3.03% and 0.97 - 3.46%, respectively. Finally, the concentration values of seminal plasma metabolites were determined using different pulse programs with both methods for samples obtained from normozoospermic control and azoospermic patient groups. The results proved that this quantification method developed using NMR spectroscopy is easy to use in complex sample systems such as biological fluids and is a good alternative to the classical internal standard method in terms of accuracy and sensitivity. In addition, the improvement of the spectral resolution and sensitivity with the microcoil probe technology and the possibility of analyzing with minimum sample quantities has contributed positively to the results of this method.
Collapse
|
2
|
Koskela H, Andjelkovic B, Pettersson A, Rapinoja ML, Kuitunen ML, Vanninen P. pH-Dependent Piecewise Linear Correlation of 1H, 31P Chemical Shifts: Application in NMR Identification of Nerve Agent Metabolites in Urine Samples. Anal Chem 2018; 90:8495-8500. [PMID: 29888904 DOI: 10.1021/acs.analchem.8b01308] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The NMR-observable nuclei of the acidic and basic compounds experience pH dependence in chemical shift. This phenomenon can be exploited in NMR titrations to determine p Ka values of compounds, or in pH measurement of solutions using dedicated pH reference compounds. On the other hand, this sensitivity can also cause problems in, for example, metabolomics, where slight changes in pH result in significant difficulties for peak alignment between spectra of set of samples for comparative analysis. In worst case, the pH sensitivity of chemical shifts can prevent unambiguous identification of compounds. Here, we propose an alternative approach for NMR identification of pH-sensitive analytes. The 1H and X (13C, 15N, 31P, ...) chemical shifts in close proximity to the acidic or basic functional group should, when presented as ordered pairs, express piecewise linear correlation with distinct slope, intercept, and range. We have studied the pH dependence of 1H and 31P chemical shifts of the CH3-P moiety in urinary metabolites of nerve agents sarin, soman and VX using 2D 1H-31P fast-HMQC spectroscopy. The 1H and 31P chemical shifts of these chemicals appear in very narrow range, and due to subtle changes in sample pH the identification on either 1H or 31P chemical shift alone is uncertain. However, if the observed 1H and 31P chemical shifts of the CH3-P moiety of individual compounds are presented as ordered pairs, they fall into distinct linear spaces, thus, facilitating identification with high confidence.
Collapse
Affiliation(s)
- Harri Koskela
- VERIFIN, Department of Chemistry , University of Helsinki , P.O. Box 55, FIN-00014 Helsinki , Finland
| | - Boban Andjelkovic
- University of Belgrade , Faculty of Chemistry , Studentski trg 12-16 , 11158 Belgrade , Serbia
| | - Annette Pettersson
- VERIFIN, Department of Chemistry , University of Helsinki , P.O. Box 55, FIN-00014 Helsinki , Finland
| | - Marja-Leena Rapinoja
- VERIFIN, Department of Chemistry , University of Helsinki , P.O. Box 55, FIN-00014 Helsinki , Finland
| | - Marja-Leena Kuitunen
- VERIFIN, Department of Chemistry , University of Helsinki , P.O. Box 55, FIN-00014 Helsinki , Finland
| | - Paula Vanninen
- VERIFIN, Department of Chemistry , University of Helsinki , P.O. Box 55, FIN-00014 Helsinki , Finland
| |
Collapse
|
3
|
Popiel S, Nawała J, Czupryński K. Preparation and application of sol–gel acrylate and methacrylate solid-phase microextraction fibres for gas chromatographic analysis of organoarsenic compounds. Anal Chim Acta 2014; 837:52-63. [DOI: 10.1016/j.aca.2014.05.039] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 05/19/2014] [Accepted: 05/25/2014] [Indexed: 11/25/2022]
|
4
|
Zalesskiy SS, Danieli E, Blümich B, Ananikov VP. Miniaturization of NMR systems: desktop spectrometers, microcoil spectroscopy, and "NMR on a chip" for chemistry, biochemistry, and industry. Chem Rev 2014; 114:5641-94. [PMID: 24779750 DOI: 10.1021/cr400063g] [Citation(s) in RCA: 129] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Sergey S Zalesskiy
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Moscow, 119991, Russia
| | | | | | | |
Collapse
|
5
|
Koskela H. A set of triple-resonance nuclear magnetic resonance experiments for structural characterization of organophosphorus compounds in mixture samples. Anal Chim Acta 2012; 751:105-11. [PMID: 23084058 DOI: 10.1016/j.aca.2012.09.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Revised: 09/09/2012] [Accepted: 09/15/2012] [Indexed: 10/27/2022]
Abstract
The (1)H, (13)C correlation NMR spectroscopy utilizes J(CH) couplings in molecules, and provides important structural information from small organic molecules in the form of carbon chemical shifts and carbon-proton connectivities. The full potential of the (1)H, (13)C correlation NMR spectroscopy has not been realized in the Chemical Weapons Convention (CWC) related verification analyses due to the sample matrix, which usually contains a high amount of non-related compounds obscuring the correlations of the relevant compounds. Here, the results of the application of (1)H, (13)C, (31)P triple-resonance NMR spectroscopy in characterization of OP compounds related to the CWC are presented. With a set of two-dimensional triple-resonance experiments the J(HP), J(CH) and J(PC) couplings are utilized to map the connectivities of the atoms in OP compounds and to extract the carbon chemical shift information. With the use of the proposed pulse sequences the correlations from the OP compounds can be recorded without significant artifacts from the non-OP compound impurities in the sample. Further selectivity of the observed correlations is achieved with the application of phosphorus band-selective pulse in the pulse sequences to assist the analysis of multiple OP compounds in mixture samples. The use of the triple-resonance experiments in the analysis of a complex sample is shown with a test mixture containing typical scheduled OP compounds, including the characteristic degradation products of nerve agents sarin, soman, and VX. The viability of the approach in verification analysis is demonstrated in the analysis of the 30th OPCW Proficiency Test sample.
Collapse
|
6
|
Mazumder A, Kumar A, Purohit AK, Dubey DK. A high-resolution phosphorus-31 nuclear magnetic resonance (NMR) spectroscopic method for the non-phosphorus markers of chemical warfare agents. Anal Bioanal Chem 2011; 402:1643-52. [DOI: 10.1007/s00216-011-5561-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 11/02/2011] [Accepted: 11/03/2011] [Indexed: 10/14/2022]
|
7
|
Koskela H, Hakala U, Vanninen P. Structural Characterization of Chemical Warfare Agent Degradation Products in Decontamination Solutions with Proton Band-Selective 1H−31P NMR Spectroscopy. Anal Chem 2010; 82:5331-40. [DOI: 10.1021/ac100867x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Harri Koskela
- VERIFIN, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki, Finland
| | - Ullastiina Hakala
- VERIFIN, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki, Finland
| | - Paula Vanninen
- VERIFIN, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki, Finland
| |
Collapse
|
8
|
Koskela H. Use of NMR techniques for toxic organophosphorus compound profiling. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:1365-81. [DOI: 10.1016/j.jchromb.2009.10.030] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2009] [Revised: 10/25/2009] [Accepted: 10/27/2009] [Indexed: 01/21/2023]
|
9
|
Sharma M, Goud DR, Gupta AK, Suryanarayana MVS. Complete 1H, 13C, 19F and 31P NMR data assignment of CWC-related chemicals N,N-dialkyl-P-alkyl phosphonamidic fluorides. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2010; 48:403-408. [PMID: 20225190 DOI: 10.1002/mrc.2587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The complete multinuclear (1)H, (13)C, (31)P and (19)F NMR data of symmetrically substituted amines containing N,N-dialkyl-P-alkyl phosphonamidic fluorides are presented. Assignment was achieved, using various one-and two-dimensional NMR experiments.
Collapse
Affiliation(s)
- Mamta Sharma
- Synthetic Chemistry Division, Defence Research and Development Establishment, Gwalior 474002, Madhya Pradesh, India.
| | | | | | | |
Collapse
|
10
|
Koskela H, Ervasti M, Björk H, Vanninen P. On-Flow Pulsed Field Gradient Heteronuclear Correlation Spectrometry in Off-Line LC−SPE−NMR Analysis of Chemicals Related to the Chemical Weapons Convention. Anal Chem 2009; 81:1262-9. [DOI: 10.1021/ac802407t] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Harri Koskela
- VERIFIN, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki, Finland, and Technology and Transport, Helsinki Metropolia University of Applied Sciences, P.O. Box 4000, FIN-00079 Helsinki, Finland
| | - Mia Ervasti
- VERIFIN, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki, Finland, and Technology and Transport, Helsinki Metropolia University of Applied Sciences, P.O. Box 4000, FIN-00079 Helsinki, Finland
| | - Heikki Björk
- VERIFIN, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki, Finland, and Technology and Transport, Helsinki Metropolia University of Applied Sciences, P.O. Box 4000, FIN-00079 Helsinki, Finland
| | - Paula Vanninen
- VERIFIN, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki, Finland, and Technology and Transport, Helsinki Metropolia University of Applied Sciences, P.O. Box 4000, FIN-00079 Helsinki, Finland
| |
Collapse
|