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Alexander S, Prasantha Sudhakaran A, Anirudhan TS. Fabrication of selective electrochemical sensor for the detection of folic acid in spinach, wheat and tablets using functionalized graphene-oxide based molecular imprinted polymer. INT J POLYM MATER PO 2023. [DOI: 10.1080/00914037.2023.2182779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
- Sheeba Alexander
- Post Graduate and Research Department of Chemistry, St. Stephen's College, Pathanapuram, Kollam-689 695, India
| | | | - Thayyath Sreenivasan Anirudhan
- Department of Chemistry, Research Centre, School of Physical and Mathematical Sciences, University of Kerala, Kariavattom, Trivandrum - 695 581, India
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CdTe Quantum Dots Modified with Cysteamine: A New Efficient Nanosensor for the Determination of Folic Acid. SENSORS 2019; 19:s19204548. [PMID: 31635083 PMCID: PMC6832340 DOI: 10.3390/s19204548] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 10/12/2019] [Accepted: 10/15/2019] [Indexed: 11/30/2022]
Abstract
In this paper, we report the synthesis, characterization, and application of a new fluorescent nanosensor based on water-soluble CdTe quantum dots (QDs) coated with cysteamine (CA) for the determination of folic acid (FA). CdTe/CA QDs were characterized by high-resolution transmission electron microscopy, the zeta potential, and Fourier-transform infrared (FT-IR), UV-visible, and fluorescence spectroscopy. CdTe QDs coated with mercaptopropionic acid (MPA) and glutathione (GSH) were prepared for comparison purposes. The effect of FA on the photoluminescence intensity of the three thiol-capped QDs at pH 8 was studied. Only CdTe/CA QDs showed a notable fluorescence quenching in the presence of FA. Then, a nanosensor based on the fluorescence quenching of the CdTe QDs at pH 8 was explored. Under optimum conditions, the calibration curve showed a linear fluorescence quenching response in a concentration range of FA from 0.16 to 16.4 μM (R2 = 0.9944), with a detection limit of 0.048 μM. A probable mechanism of fluorescence quenching was proposed. The nanosensor showed good selectivity over other possible interferences. This method has been applied for FA quantification in orange beverage samples with excellent results (recoveries from 98.3 to 103.9%). The good selectivity, sensitivity, low cost, and rapidity make CdTe /CA QDs a suitable nanosensor for FA determination.
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Meng F, Zhang G, Wang C, Zhu R, Li H, Xu J, Shakya S, Chen W, Wu L, Zhang J. Folic acid and its metabolite codetermination for pharmacokinetics with circadian rhythms and evaluation of oral bioavailability. ACTA ACUST UNITED AC 2019; 71:1645-1654. [PMID: 31435940 DOI: 10.1111/jphp.13155] [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: 01/10/2019] [Accepted: 07/28/2019] [Indexed: 12/01/2022]
Abstract
OBJECTIVES Pharmacokinetics of vitamins is still a challenge. In this study, folic acid (FA) was used as a model drug and aimed at investigating a reliable method for its detailed pharmacokinetic evaluations. METHODS An high-performance liquid chromatography-tandem mass spectrometry method was developed and performed to determinate the FA and 5-methyltetrahydrofolic acid (5-methylTHF) simultaneously, which was applied to characterize the circadian rhythms as well as the pharmacokinetics of different preparations. KEY FINDINGS The plasma concentration of 5-methylTHF in fasted state was twofold higher than that in fed state. The circadian rhythms were studied before the pharmacokinetics and revealed that free FA was almost undetected in blank plasma, while 5-methylTHF had a slight decrement at 12:00. Hence, the pharmacokinetics of FA was conducted and showed that the administration of FA solution resulted in enhancing bioavailability of 5-methylTHF comparing with FA raw material suspension, whereas the free FA level in plasma was similar. The mechanism could be that FA was rapidly metabolized to 5-methylTHF in intestinal epithelial cell after absorption, which revealed that intestinal metabolism would affect its bioavailability. CONCLUSION A suitable method was established considering the baseline level, circadian rhythms and intestinal metabolism to investigate the pharmacokinetics of FA for guiding the further research of vitamins.
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Affiliation(s)
- Fanyue Meng
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,Institute of Drug Metabolism, School of Pharmaceutical Sciences, Anhui University of Chinese Medicine, Hefei, China
| | - Guoqing Zhang
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,Institute of Drug Metabolism, School of Pharmaceutical Sciences, Anhui University of Chinese Medicine, Hefei, China
| | - Caifen Wang
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Rui Zhu
- Institute of Drug Metabolism, School of Pharmaceutical Sciences, Anhui University of Chinese Medicine, Hefei, China
| | - Haiyan Li
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Jian Xu
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Shailendra Shakya
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Weidong Chen
- Institute of Drug Metabolism, School of Pharmaceutical Sciences, Anhui University of Chinese Medicine, Hefei, China
| | - Li Wu
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Jiwen Zhang
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,Institute of Drug Metabolism, School of Pharmaceutical Sciences, Anhui University of Chinese Medicine, Hefei, China.,University of Chinese Academy of Sciences, Beijing, China
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Akbar S, Anwar A, Kanwal Q. Electrochemical determination of folic acid: A short review. Anal Biochem 2016; 510:98-105. [PMID: 27449133 DOI: 10.1016/j.ab.2016.07.002] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 07/02/2016] [Accepted: 07/04/2016] [Indexed: 10/21/2022]
Abstract
Folic acid (FA) is an electroactive compound of biological origin. It helps our body to produce and maintain healthy cells. It can significantly reduce the occurrence of neural tube defects and also prevents change in DNA structure. FA deficiency can lead to various health risks. Therefore, a sensitive, specific, and reproducible way of FA detection is essential. A number of analytical methods are in practice for the quantification of FA. However, electroanalytical methods are attracting much attention because of their advantage over conventional methods, as they are fast, simple, sensitive, and cost effective. Moreover, modification of electrodes offers control over size and morphology which allows miniaturization for applicability in portable electrochemical devices.
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Affiliation(s)
- S Akbar
- Department of Basic Sciences and Humanities, University of Engineering and Technology Lahore, KSK Campus, Pakistan.
| | - A Anwar
- Department of Basic Sciences and Humanities, University of Engineering and Technology Lahore, KSK Campus, Pakistan
| | - Q Kanwal
- Department of Basic Sciences and Humanities, University of Engineering and Technology Lahore, KSK Campus, Pakistan
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Rutyna I. Determination of Folic Acid at a Bismuth Film Electrode by Adsorptive Stripping Voltammetry. ANAL LETT 2015. [DOI: 10.1080/00032719.2014.994122] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Manzoori JL, Jouyban A, Amjadi M, Soleymani J. Spectrofluorimetric determination of folic acid in tablets and urine samples using 1,10-phenanthroline-terbium probe. LUMINESCENCE 2011; 26:106-11. [DOI: 10.1002/bio.1191] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Ojani R, Raoof JB, Zamani S. Electrocatalytic Oxidation of Folic Acid on Carbon Paste Electrode Modified by Nickel Ions Dispersed into Poly(o-anisidine) Film. ELECTROANAL 2009. [DOI: 10.1002/elan.200904673] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Korolczuk M, Tyszczuk K. Determination of Folic Acid by Adsorptive Stripping Voltammetry at a Lead Film Electrode. ELECTROANAL 2007. [DOI: 10.1002/elan.200703969] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Guo HX, Li YQ, Fan LF, Wu XQ, Guo MD. Voltammetric behavior study of folic acid at phosphomolybdic-polypyrrole film modified electrode. Electrochim Acta 2006. [DOI: 10.1016/j.electacta.2006.04.013] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wei S, Zhao F, Xu Z, Zeng B. Voltammetric Determination of Folic Acid with a Multi-Walled Carbon Nanotube-Modified Gold Electrode. Mikrochim Acta 2005. [DOI: 10.1007/s00604-005-0437-1] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wang C, Li C, Ting L, Xu X, Wang C. Application of a Single-Wall Carbon Nano-Tube Film Electrode to the Determination of Trace Amounts of Folic Acid. Mikrochim Acta 2005. [DOI: 10.1007/s00604-005-0441-5] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Zhang ZQ, Tang Y. Solid-phase reactor flow-injection on-line oxidizing spectrofluorimetry for determination and dissolution studies of folic acid. Anal Bioanal Chem 2004; 381:932-6. [PMID: 15616777 DOI: 10.1007/s00216-004-2961-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2004] [Revised: 10/21/2004] [Accepted: 11/04/2004] [Indexed: 10/26/2022]
Abstract
A simple, sensitive and specific flow-injection spectrofluorimetric method has been developed for the determination of folic acid in pharmaceuticals. The method is based on use of a lead dioxide solid-phase reactor for on-line oxidation of folic acid into a strongly fluorescent compound with a maximum excitation wavelength of 281 nm and an emission wavelength of 450 nm. Under optimum conditions the fluorescence intensity of oxidation product is proportional to the concentration of folic acid over the range 0.008-2.5 microg mL(-1). The detection limit is 0.0001 microg mL(-1), the relative standard deviation is 0.85% for 11 replicate determinations of 0.05 microg mL(-1) folic acid, and the sample throughput is 20 h(-1). In combination with an on-line filter and dilution, an automated drug-dissolution system was established. The proposed method has been successfully applied to the determination of folic acid in pharmaceutical preparations and dissolution testing.
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Affiliation(s)
- Zhi-Qi Zhang
- School of Chemistry and Materials Sciences, Shaanxi Normal University, Xi'an 710062, P R China.
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Song Z, Wang L. Chemiluminescence inhibition assay for folic acid using flow injection analysis. PHYTOCHEMICAL ANALYSIS : PCA 2003; 14:216-220. [PMID: 12892416 DOI: 10.1002/pca.704] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A new flow injection method for the determination of folic acid is described. A fast oxidation reaction occurred when folic acid was mixed with potassium ferricyanide generating ferrocyanide which then inhibited the chemiluminescent reaction of ferricyanide and luminol in alkaline medium. The decrease of chemiluminescence intensity was correlated with the folic acid concentration in the range 0.1-21 microg/mL; the detection limit for the assay was 0.03 microg/mL (3sigma). A complete analysis of folic acid, including sampling and washing, could be performed within 2 min with a relative standard deviation of less than 4.0%. The proposed method has been applied successfully to the determination of folic acid in pharmaceutical preparations.
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Affiliation(s)
- Zhenghua Song
- Department of Chemistry, Northwest University, Xi'an, 710069, People's Republic of China.
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Nagaraja P, Vasantha RA, Yathirajan HS. Spectrophotometric determination of folic acid in pharmaceutical preparations by coupling reactions with iminodibenzyl or 3-aminophenol or sodium molybdate-pyrocatechol. Anal Biochem 2002; 307:316-21. [PMID: 12202249 DOI: 10.1016/s0003-2697(02)00038-6] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Novel coupling reagents are used for the simple and sensitive spectrophotometric determination of folic acid either in pure form or in its pharmaceutical preparations. The methods are based on the probable diazotization of the p-aminobenzoylglutamic acid obtained after reductive clevage of folic acid, followed by either coupling with iminodibenzyl to give a violet product with lambda(max) of 580nm or coupling with 3-aminophenol to produce an orange yellow-colored product with lambda(max) of 460nm. Sodium molybdate and pyrocatechol are used in the third method and the pale red-colored product formed has a lambda(max) of 490nm. The methods are highly reproducible and have been applied to the determination of folic acid in tablets and the results compare favorably with the official method. Common excipients used as additives in pharmaceutical preparations do not interfere in the proposed methods.
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The direct electrochemistry of folic acid at a 2-mercaptobenzothiazole self-assembled gold electrode. J Electroanal Chem (Lausanne) 2002. [DOI: 10.1016/s0022-0728(02)00836-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Song Z, Zhou X. Chemiluminescence flow sensor for folic acid with immobilized reagents. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2001; 57:2567-2574. [PMID: 11765783 DOI: 10.1016/s1386-1425(01)00441-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A novel chemiluminescence (CL) sensor for folic acid combined flow-injection (FI) technology was presented in this paper. The analytical reagents involved in the CL reaction, including luminol and hexacyanoferrate(III), were both immobilized on an anion-exchange column in FI system. The CL signal produced by the reaction between luminol and hexacyanoferrate(III), which were eluted from the column through sodium phosphate injection, was decreased in the presence of folic acid. The CL emission was correlated with the folic acid concentration in the range from 0.01 to 15 microg ml(-1), and the detection limit was 3.5 ng ml(-1) folic acid (3sigma). At a flow rate of 2.0 ml min(-1), including sampling and washing, could be performed in 2 min with a relative standard deviation of < 2.5%. The flow sensor could be reused more than 300 times and has been applied to the analysis of folic acid in pharmaceutical preparations. and the recovery was from 97.4% to 100.4%.
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Affiliation(s)
- Z Song
- Department of Chemistry, Northwest University, Xian, People's Republic of China.
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Çakır S, Biçer E, Çakır O. Electrochemical study of cystine in the presence of cadmium and folic acid1In honour of Professor Petr Zuman’s visit to our University.1. J Inorg Biochem 1999. [DOI: 10.1016/s0162-0134(99)00207-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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�akir S, Atayman ?, �akir O. Simultaneous square-wave voltammetric determination of riboflavin and folic acid in pharmaceutical preparations. Mikrochim Acta 1997. [DOI: 10.1007/bf01242327] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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