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Shamsaei D, Hsieh SA, Ocaña-Rios I, Ryan SJ, Anderson JL. Smartphone as a fluorescence detector for high-performance liquid chromatography. Anal Chim Acta 2023; 1280:341863. [PMID: 37858553 DOI: 10.1016/j.aca.2023.341863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 09/26/2023] [Accepted: 09/29/2023] [Indexed: 10/21/2023]
Abstract
BACKGROUND Fluorescence detection is employed in high-performance liquid chromatography (HPLC) due to its high specificity and sensitivity. However, it is often limited by expensive components and bulkiness. Recently, advances in technology and electronics have led to the development of smartphones that can serve as portable recording, analysis, and monitoring tools. Smartphone-based detection provides advantages of cost effectiveness, rapid signal/data processing, and the display of results on a handhold monitor. The combination of smartphone-based detection with HPLC can offer unique features that are beneficial in overcoming limitations of commercial fluorescence detectors. (90) RESULTS: A miniaturized and low-cost HPLC fluorescence detector based on a smartphone is introduced for the detection of six fluorescent molecules. The smartphone is able to capture emitted fluorescence in video format while MATLAB code is used for data processing to provide chromatograms based on different detection channels. A custom designed double-channel flow cell was utilized to enable simultaneous detection of fluorescent compounds with different excitation wavelengths. The detector consists of a lab-made flow cell, monochromatic LEDs as the light source, 3D printed housing and connector box, fiber optic cables, and a smartphone. The effects of flow cell geometry, channel width and light slit diameter, as well as a comparison of different flow cell manufacturing techniques, are studied and discussed. The validated system was successfully applied to samples from diverse water sources, yielding spiking recoveries within the range of 91.7% and 109.7%. (141) SIGNIFICANCE: This study introduces the first smartphone-based fluorescence detector for HPLC with cost-effective and customizable flow cells, allowing for the simultaneous detection of fluorescent compounds with different excitation wavelengths and offering a potential solution for the analysis of co-eluting compounds. Beyond its user-friendly interface and low-cost, smartphone detection in HPLC provides tremendous opportunities in further miniaturizing chromatographic instrumentation while offering high sensitivity and can be expanded to other mechanisms of detection. (70).
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Affiliation(s)
- Danial Shamsaei
- Department of Chemistry, Iowa State University, Ames, IA, 50011, USA
| | - Shu-An Hsieh
- Department of Chemistry, Iowa State University, Ames, IA, 50011, USA
| | - Iran Ocaña-Rios
- Department of Chemistry, Iowa State University, Ames, IA, 50011, USA
| | - Saxon J Ryan
- Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Jared L Anderson
- Department of Chemistry, Iowa State University, Ames, IA, 50011, USA.
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2
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Soumya S, Joe IH. A combined experimental and quantum chemical study on molecular structure, spectroscopic properties and biological activity of anti-inflammatory Glucocorticosteroid drug, Dexamethasone. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130999] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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3
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Iqbal DN, Ashraf A, Iqbal M, Nazir A. Analytical method development and validation of hydrocortisone and clotrimazole in topical dosage form using RP-HPLC. FUTURE JOURNAL OF PHARMACEUTICAL SCIENCES 2020. [DOI: 10.1186/s43094-020-00065-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Abstract
Background
Different pharmaceutical topical agents are available in the market for the treatment of fungal infections. A simple, precise, and cost-effective RP-HPLC method was developed and validated for the determination of hydrocortisone and clotrimazole simultaneously in a topical cream dosage form. Chromatographic separation was done on USP L1 (250 × 4.6) mm column with a particle size of 5 μm. The mobile phase employed for this study consists of acetonitrile and buffer in the ratio of 75:25, respectively. The flow rate was kept at 1 mL per minute. The detection of the drug was carried out at 254 nm using a UV detector. The retention times of HYD and CL were 3.0 min and 7.3 min, respectively.
Result
The method is developed and validated for linearity, precision, specificity, accuracy, and robustness.
Conclusion
The stability of finished products gives us knowledge about the effect of different environmental factors like humidity, light, and temperature, and these factors give us information about the quality of finished products.
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Katakam LNR, Dongala T, Ettaboina SK. Novel stability indicating UHPLC method development and validation for simultaneous quantification of hydrocortisone acetate, pramoxine hydrochloride, potassium sorbate and sorbic acid in topical cream formulation. TALANTA OPEN 2020. [DOI: 10.1016/j.talo.2020.100004] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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5
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Fares MY, Abdelrahman MM, Abdel-Rahman HM, Abdelwahab NS. Development and validation of different spectrophotometric and chromatographic methods for determination of clotrimazole and hydrocortisone in a topical cream. ACTA ACUST UNITED AC 2017. [DOI: 10.5155/eurjchem.8.4.371-377.1646] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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6
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Kumar D, Singh H, Shrivastav TG. Homologous ELISA for detection of prednisolone in human serum. FOOD AGR IMMUNOL 2017. [DOI: 10.1080/09540105.2017.1376184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- Dinesh Kumar
- Immuno, Isotope and Nano-technology Laboratory, Department of Reproductive Biomedicine, The National Institute of Health and Family Welfare (NIHFW), New Delhi, India
- Indian Institute of Technology Delhi (IIT-D), New Delhi, India
- All India Institute of Medical Sciences Delhi (AIIMS-D), New Delhi, India
| | - Harpal Singh
- Indian Institute of Technology Delhi (IIT-D), New Delhi, India
- All India Institute of Medical Sciences Delhi (AIIMS-D), New Delhi, India
| | - T. G. Shrivastav
- Immuno, Isotope and Nano-technology Laboratory, Department of Reproductive Biomedicine, The National Institute of Health and Family Welfare (NIHFW), New Delhi, India
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7
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Smajdor J, Piech R, Paczosa-Bator B. A Novel Method of High Sensitive Determination of Prednisolone on Renewable Mercury Film Silver Based Electrode. ELECTROANAL 2015. [DOI: 10.1002/elan.201500262] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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8
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Marley A, Stalcup AM, Connolly D. Development and validation of a new stability indicating reversed phase liquid chromatographic method for the determination of prednisolone acetate and impurities in an ophthalmic suspension. J Pharm Biomed Anal 2015; 102:261-6. [DOI: 10.1016/j.jpba.2014.09.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Revised: 09/09/2014] [Accepted: 09/16/2014] [Indexed: 12/01/2022]
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9
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Tay AS, Liu EH, Lee TL, Miyazaki S, Nishimura W, Minami T, Chan YH, Low CM, Tachibana S. Cerebrospinal fluid of postherpetic neuralgia patients induced interleukin-6 release in human glial cell-line T98G. Neurochem Int 2013; 63:517-21. [DOI: 10.1016/j.neuint.2013.08.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 07/25/2013] [Accepted: 08/01/2013] [Indexed: 11/15/2022]
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10
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Carrier mediated transport solvent bar microextraction for preconcentration and determination of dexamethasone sodium phosphate in biological fluids and bovine milk samples using response surface methodology. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 931:148-56. [DOI: 10.1016/j.jchromb.2013.05.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 05/12/2013] [Accepted: 05/21/2013] [Indexed: 11/18/2022]
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11
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Bredehöft M, Baginski R, Parr MK, Thevis M, Schänzer W. Investigations of the microbial transformation of cortisol to prednisolone in urine samples. J Steroid Biochem Mol Biol 2012; 129:54-60. [PMID: 20435141 DOI: 10.1016/j.jsbmb.2010.04.021] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2009] [Revised: 04/07/2010] [Accepted: 04/23/2010] [Indexed: 11/21/2022]
Abstract
Doping control samples are normally collected under non-sterile conditions and sometimes, storage and transportation are influenced by parameters such as the temperature. Therefore, microbial contamination and subsequent alteration of a sample's composition are possible. Studies regarding sample collection in cattle breeding have already shown enzymatic transformation of endogenous testosterone to boldenone causing false-positive findings. The aim of the present study was to investigate whether positive doping cases with the synthetic corticosteroids prednisolone and prednisone may result from microbial transformation of the endogenous corticosteroids cortisol and cortisone, respectively. A method comprising parameters such as pH values and screening results for synthetic glucocorticosteroids as well as incubation experiments followed by liquid chromatographic and mass spectrometric analysis was employed to test for contaminating germs with Δ(1)-dehydrogenase activity. Over 700 urine samples comprising inpatient and doping control specimens were investigated. In none of them, 1,2-dehydrogenating activity was confirmed. These findings are in accordance with other studies. However, the problem of microbial alteration of doping control specimens with special respect to 1,2-dehydrogenation must not be underestimated. Article from a special issue on steroids and microorganisms.
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Affiliation(s)
- Michael Bredehöft
- Institute of Biochemistry, German Sport University Cologne, Cologne, Germany. michael
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12
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Xu X, Flores JD, McCormick CL. Reversible Imine Shell Cross-Linked Micelles from Aqueous RAFT-Synthesized Thermoresponsive Triblock Copolymers as Potential Nanocarriers for “pH-Triggered” Drug Release. Macromolecules 2011. [DOI: 10.1021/ma102804h] [Citation(s) in RCA: 143] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Xuewei Xu
- Department of Polymer Science and §Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Joel D. Flores
- Department of Polymer Science and §Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Charles L. McCormick
- Department of Polymer Science and §Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
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13
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Al-Ghazawi M, AbuRuz S. Determination of Ciprofloxacin in Dried Blood Spots for Therapeutic Drug Monitoring. Chromatographia 2010. [DOI: 10.1365/s10337-010-1568-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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14
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Dési E, Kovács Á, Palotai Z, Kende A. Analysis of dexamethasone and prednisolone residues in bovine milk using matrix solid phase dispersion-liquid chromatography with ultraviolet detection. Microchem J 2008. [DOI: 10.1016/j.microc.2007.12.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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Zhang Y, Wu HL, Ding YJ, Xia AL, Cui H, Yu RQ. Simultaneous determination of cortisol and prednisolone in body fluids by using HPLC–DAD coupled with second-order calibration based on alternating trilinear decomposition. J Chromatogr B Analyt Technol Biomed Life Sci 2006; 840:116-23. [PMID: 16714156 DOI: 10.1016/j.jchromb.2006.04.043] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2005] [Revised: 04/10/2006] [Accepted: 04/28/2006] [Indexed: 11/17/2022]
Abstract
A novel method for simultaneous determination of cortisol and prednisolone in body fluids has been developed in this paper. Three-way data recorded by high-performance liquid chromatography with a diode array detector (HPLC-DAD) have been analyzed by second-order calibration based on the alternating trilinear decomposition (ATLD) algorithm. The chemometric methodology selected exploits the second-order advantage of the three-way data arrays, which allows one to obtain concentrations of individual calibrated analytes even in the presence of interferences not present in the calibration samples (e.g. background in urine or plasma). It was applied to simultaneous determination of cortisol and prednisolone in both plasma and urine samples. Though the chromatographic and spectral peaks of the analytes were heavily overlapped and interferents coeluted with the compounds studied, good recoveries of the analytes could be obtained with HPLC-DAD coupled with second-order calibration based on ATLD. Sample preparation was based on solvent extraction (SE), and quantification can be carried out with simple mobile phase. The time required for the quantification process is shorter than other methods.
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Affiliation(s)
- Yan Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
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16
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Simultaneous determination of 11 drugs belonging to four different groups in human urine samples by reversed-phase high-performance liquid chromatography method. Anal Chim Acta 2006. [DOI: 10.1016/j.aca.2006.04.002] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Aburuz S, Millership J, McElnay J. Dried blood spot liquid chromatography assay for therapeutic drug monitoring of metformin. J Chromatogr B Analyt Technol Biomed Life Sci 2006; 832:202-7. [PMID: 16446128 DOI: 10.1016/j.jchromb.2005.12.050] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2005] [Revised: 12/20/2005] [Accepted: 12/29/2005] [Indexed: 10/25/2022]
Abstract
The use of blood spot collection cards is a simple way to obtain specimens for analysis of drugs for the purpose of therapeutic drug monitoring, assessing adherence to medications and preventing toxicity in routine clinical setting. We describe the development and validation of a microanalytical technique for the determination of metformin from dried blood spots. The method is based on reversed phase high-performance liquid chromatography with ultraviolet detection. Drug recovery in the developed method was found to be more than 84%. The limits of detection and quantification were calculated to be to be 90 and 150 ng/ml, respectively. The intraday and interday precision (measured by CV%) was always less than 9%. The accuracy (measured by relative error, %) was always less than 12%. Stability analysis showed that metformin is stable for at least 2 months when stored at -70 degrees C. The small volume of blood required (10 microL), combined with the simplicity of the analytical technique makes this a useful procedure for monitoring metformin concentrations in routine clinical settings. The method is currently being applied to the analysis of blood spots taken from diabetic patients to assess adherence to medications and relationship between metformin level and metabolic control of diabetes.
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Affiliation(s)
- S Aburuz
- Department of Clinical Pharmacy, Faculty of Pharmacy, The University of Jordan, Amman, Jordan.
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18
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AbuRuz S, Millership J, Heaney L, McElnay J. Simple liquid chromatography method for the rapid simultaneous determination of prednisolone and cortisol in plasma and urine using hydrophilic lipophilic balanced solid phase extraction cartridges. J Chromatogr B Analyt Technol Biomed Life Sci 2004; 798:193-201. [PMID: 14643497 DOI: 10.1016/j.jchromb.2003.09.044] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
This article describes the development and validation of a simple solid phase extraction (SPE) and HPLC method for the extraction and the specific determination of prednisolone and hydrocortisone (cortisol) in both plasma and urine using one washing step with Oasis hydrophilic lipophilic balanced (HLB) cartridges (1 ml/30 mg, 30 microm). Recoveries of prednisolone and cortisol from plasma and urine exceeded 82%. The limit of quantification (LOQ) in plasma and urine was 9.9 and 6.7 ng/ml for cortisol, respectively, and 11.6 and 8.0 ng/ml for prednisolone, respectively. The intraday and interday precision (measured by CV%) for both prednisolone and cortisol in both plasma and urine was always less than 7%. The accuracy (measured by relative error %) for both prednisolone and cortisol in both plasma and urine was always less than 8%. The advantages of the developed method are the use of a one step washing SPE utilising HLB cartridges which do not suffer the drying out problems of conventional SPE cartridges and the time saving when compared with solvent extraction (SE), in addition to the simultaneous determination of prednisolone and cortisol in both plasma and urine.
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Affiliation(s)
- S AbuRuz
- Clinical and Practice Research Group, School of Pharmacy, Queens University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
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19
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AbuRuz S, Millership J, McElnay J. Determination of metformin in plasma using a new ion pair solid phase extraction technique and ion pair liquid chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2003; 798:203-9. [PMID: 14643498 DOI: 10.1016/j.jchromb.2003.09.043] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This article describes the development of the first ion pair solid phase extraction technique (IPSPE), which has been applied to the extraction of metformin from plasma samples. In addition an ion pair chromatographic method was developed for the specific HPLC determination of metformin. Several extraction and HPLC methods have been described previously for metformin, however, most of them did not solve the problems associated with the high polarity of this drug. Drug recovery in the developed method was found to be more than 98%. The limit of detection and limit of quantification was 3 and 5 ng/ml, respectively. The intraday and interday precision (measured by coefficient of variation, CV%) was always less than 9%. The accuracy (measured by relative error, R.E.%) was always less than 6.9%. Stability analysis showed that metformin is stable for at least 3 months when stored at -70 degrees C. The method has been applied to 150 patient samples as part of a medication adherence study.
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Affiliation(s)
- S AbuRuz
- Clinical and Practice Research Group, School of Pharmacy, Queen's University Belfast, Belfast BT9 7BL, UK
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van Hout MWJ, Hofland CM, Niederländer HAG, Bruins AP, de Zeeuw RA, de Jong GJ. On-line coupling of solid-phase extraction with mass spectrometry for the analysis of biological samples. III. Determination of prednisolone in serum. J Chromatogr B Analyt Technol Biomed Life Sci 2003; 794:185-92. [PMID: 12888211 DOI: 10.1016/s1570-0232(03)00395-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Solid-phase extraction (SPE) was directly coupled to mass spectrometry (MS) to assess the feasibility of the system for the rapid determination of prednisolone in serum. A C(18) stationary phase allowed washing of the cartridge with 25% methanol. Elution was performed by switching the methanol percentage from 25% in the washing step to 50% during elution. The high flow-rates during the extraction (5.0 ml/min) combined with ion-trap MS detection resulted in a total analysis time of 4 min. Some tailing of the prednisolone peak was observed. However, the tailing was found acceptable, since by this elution procedure most matrix compounds were prevented from eluting from the cartridge. Some matrix interference was still observed with a triple-quadrupole MS, even in the multiple reaction monitoring mode. This resulted in a detection limit (LOD) of about 10 ng/ml. The matrix interference and the LOD were similar for atmospheric pressure chemical ionisation and atmospheric pressure photo ionisation. Applying an ion-trap MS in the MS-MS mode resulted in cleaner chromatograms. Due to extensive fragmentation of prednisolone, the LOD was not lower than about 5 ng/ml prednisolone in serum, and a limit of quantitation of about 10 ng/ml (relative standard deviation <15%) was observed.
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Affiliation(s)
- M W J van Hout
- Department of Analytical Chemistry and Toxicology, University Centre for Pharmacy, University of Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands.
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21
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Cho CY, Shin BS, Yoo SD. Sensitive Analysis of Prednisolone and Prednisone in Human Plasma by Reverse Phase High-Performance Liquid Chromatography with Ultraviolet Detection. ANAL LETT 2003. [DOI: 10.1081/al-120021540] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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22
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Shimada K, Mitamura K, Higashi T. Gas chromatography and high-performance liquid chromatography of natural steroids. J Chromatogr A 2001; 935:141-72. [PMID: 11762773 DOI: 10.1016/s0021-9673(01)00943-8] [Citation(s) in RCA: 124] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
This review article underlines the importance of gas chromatography (GC), high-performance liquid chromatography (HPLC) and their hyphenated techniques using mass spectrometry (MS) for the determination of natural steroids, especially in human biological fluids. Steroids are divided into eight categories based on their structures and functions, and recent references using the above methodologies for the analysis of these steroids are cited. GC and GC-MS are commonly used for the determination of volatile steroids. Although HPLC is a widely used analytical method for the determination of steroids including the conjugated type in biological fluids, LC-MS is considered to be the most promising one for this purpose because of its sensitivity, specificity and versatility.
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Affiliation(s)
- K Shimada
- Faculty of Pharmaceutical Sciences, Kanazawa University, Japan.
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Chapter 15 Doping substances in human and animal sport. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s1567-7192(00)80070-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Wiedmer SK, Sirén H, Riekkola ML. Determination of serum corticosteroids by mixed micellar electrokinetic capillary chromatography with sodium dodecyl sulfate and sodium cholate. Electrophoresis 1997; 18:1861-4. [PMID: 9372281 DOI: 10.1002/elps.1150181023] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The application of mixed micellar electrokinetic capillary electrochromatography to the determination of the corticosteroid hormones cortisone, cortisol (hydrocortisone), and dexamethasone in serum samples is demonstrated. The serum samples were enzymatically hydrolyzed, precipitated, solid-phase extracted, and analyzed by capillary electrophoresis. A micellar system of sodium dodecyl sulfate and sodium cholate buffered with an organic compound provided the electrolyte solution. Spiked blank serum samples were used for the linearity testing and limits of detection and quantitation were measured. Patient samples were analyzed and the concentrations of cortisol and cortisone were measured. The method, which was fast and easy to perform, was confirmed to be useful for the determination of corticosteroids in serum.
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Affiliation(s)
- S K Wiedmer
- Department of Chemistry, University of Helsinki, Finland
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