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Tangtawewipat T, Thanachasai S. Amperometric bienzymatic biosensor in flow injection analysis system for determination of aspartame in foods. Food Sci Biotechnol 2024; 33:343-354. [PMID: 38222917 PMCID: PMC10786783 DOI: 10.1007/s10068-023-01347-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 04/29/2023] [Accepted: 05/16/2023] [Indexed: 01/16/2024] Open
Abstract
An amperometric bienzymatic biosensor was developed for the determination of aspartame in a flow injection analysis (FIA) system, consisting of two enzyme reactor columns packed with immobilized α-chymotrypsin (CHY) and alcohol oxidase (AOX) beads and a hydrogen peroxide electrode, connected in series. The CHY and AOX were separately immobilized on glutaraldehyde (GA)-activated beads through covalent bonding. The biosensor fabrication and operational conditions were optimized. The optimal fabrication conditions were: 2% GA with 120 min activation time; and 250 U/mL CHY and 100 U/mL AOX, with 180 min enzyme immobilization time. The optimal operational conditions were a flow rate of 0.5 mL/min and pH 8.0 at room temperature. The developed biosensor showed linearity over the aspartame concentration range 0.01-1.2 mM, with a detection limit of 0.005 mM. The developed biosensor was satisfactorily applied for detecting aspartame in beverage samples without any excessive pretreatments.
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Affiliation(s)
- Tanaporn Tangtawewipat
- Department of Food Science and Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok, 10900 Thailand
| | - Saipin Thanachasai
- Department of Food Science and Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok, 10900 Thailand
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Measuring Artificial Sweeteners Toxicity Using a Bioluminescent Bacterial Panel. Molecules 2018; 23:molecules23102454. [PMID: 30257473 PMCID: PMC6222326 DOI: 10.3390/molecules23102454] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 09/21/2018] [Accepted: 09/22/2018] [Indexed: 12/16/2022] Open
Abstract
Artificial sweeteners have become increasingly controversial due to their questionable influence on consumers' health. They are introduced in most foods and many consume this added ingredient without their knowledge. Currently, there is still no consensus regarding the health consequences of artificial sweeteners intake as they have not been fully investigated. Consumption of artificial sweeteners has been linked with adverse effects such as cancer, weight gain, metabolic disorders, type-2 diabetes and alteration of gut microbiota activity. Moreover, artificial sweeteners have been identified as emerging environmental pollutants, and can be found in receiving waters, i.e., surface waters, groundwater aquifers and drinking waters. In this study, the relative toxicity of six FDA-approved artificial sweeteners (aspartame, sucralose, saccharine, neotame, advantame and acesulfame potassium-k (ace-k)) and that of ten sport supplements containing these artificial sweeteners, were tested using genetically modified bioluminescent bacteria from E. coli. The bioluminescent bacteria, which luminesce when they detect toxicants, act as a sensing model representative of the complex microbial system. Both induced luminescent signals and bacterial growth were measured. Toxic effects were found when the bacteria were exposed to certain concentrations of the artificial sweeteners. In the bioluminescence activity assay, two toxicity response patterns were observed, namely, the induction and inhibition of the bioluminescent signal. An inhibition response pattern may be observed in the response of sucralose in all the tested strains: TV1061 (MLIC = 1 mg/mL), DPD2544 (MLIC = 50 mg/mL) and DPD2794 (MLIC = 100 mg/mL). It is also observed in neotame in the DPD2544 (MLIC = 2 mg/mL) strain. On the other hand, the induction response pattern may be observed in its response in saccharin in TV1061 (MLIndC = 5 mg/mL) and DPD2794 (MLIndC = 5 mg/mL) strains, aspartame in DPD2794 (MLIndC = 4 mg/mL) strain, and ace-k in DPD2794 (MLIndC = 10 mg/mL) strain. The results of this study may help in understanding the relative toxicity of artificial sweeteners on E. coli, a sensing model representative of the gut bacteria. Furthermore, the tested bioluminescent bacterial panel can potentially be used for detecting artificial sweeteners in the environment, using a specific mode-of-action pattern.
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Kirgöz UA, Odaci D, Timur S, Merkoçi A, Alegret S, Beşün N, Telefoncu A. A biosensor based on graphite epoxy composite electrode for aspartame and ethanol detection. Anal Chim Acta 2006; 570:165-9. [PMID: 17723395 DOI: 10.1016/j.aca.2006.04.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2006] [Revised: 04/04/2006] [Accepted: 04/05/2006] [Indexed: 11/21/2022]
Abstract
A gelatin membrane with carboxyl esterase and alcohol oxidase was subsequently integrated onto the surface of a graphite epoxy composite electrode (GECE). The developed biosensors showed linearity in the range of 2.5-400 microM for aspartame and 2.5-25 microM for ethanol with response times of 170 and 70s for each analyte, respectively. The resulting bienzyme biosensor was used for aspartame detection in diet coke samples and ethanol detection in beer and wine samples. From the obtained results, it can be concluded that the developed biosensor is a selective, practical and economic tool for aspartame and ethanol detection in real samples.
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Affiliation(s)
- Ulkü Anik Kirgöz
- Mugla University, Faculty of Arts and Science, Chemistry Department, 48000-Kötekli, Mugla, Turkey.
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Liebs P, Riedel K, Pfeiffer D, Zimare U, Lietz P, Scheller F. Biosensoren für die Lebensmittelindustrie. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/abio.370090608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Odacι D, Timur S, Telefoncu A. Carboxyl esterase-alcohol oxidase based biosensor for the aspartame determination. Food Chem 2004. [DOI: 10.1016/j.foodchem.2003.07.032] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Xiao D, Choi MMF. Aspartame optical biosensor with bienzyme-immobilized eggshell membrane and oxygen-sensitive optode membrane. Anal Chem 2002; 74:863-70. [PMID: 11871376 DOI: 10.1021/ac001097a] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An aspartame optical biosensor has been fabricated by employing a bienzyme system composed of alpha-chymotrypsin and alcohol oxidase immobilized onto an eggshell membrane and an oxygen-sensitive optode membrane as the transducer. The detection schemes involve the enzymatic reactions of aspartame leading to the depletion of the oxygen level of the medium with a concomitant enhancement of the fluorescence intensity of the oxygen-sensitive membrane. The scanning electron and transmission electron micrographs show the microstructure of the eggshell membrane which is successfully immobilized with bienzyme. Using this novel immobilization technique, the aspartame biosensor shows extremely good stability with a shelf life of at least 8 months. The rate change of the fluorescence intensity in 4 min is found to be linearly related to the concentration of aspartame. The useful analytical working range of the biosensor is from 0.056 to 3.07 mM aspartame. The effects of temperature, pH, and ionic strength on the response of the aspartame biosensor are investigated in detail. Citric acid, cyclamic acid, D-fructose, D-galactose, D-glucose, hydrogen peroxide, DL-malic acid, L-phenylalanine, saccharin, sodium benzoate, and sucrose show no interferences but ethanol interferes strongly. The aspartame biosensor has been applied to determine aspartame contents in some commercial products.
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Affiliation(s)
- Dan Xiao
- College of Chemistry and Chemical Engineering, Hunan University, Changsha, PR China
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Subrahmanyam S, Kodandapani N, Ahamarshan JN, Ranganathan B, Shanmugam K, Jeyakumar D, Subramanian TV. Amperometric Biochemical Characterization of Isolated Fungal Strains. ELECTROANAL 2001. [DOI: 10.1002/1521-4109(200111)13:17<1454::aid-elan1454>3.0.co;2-r] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
A microbial biosensor consists of a transducer in conjunction with immobilised viable or non-viable microbial cells. Non-viable cells obtained after permeabilisation or whole cells containing periplasmic enzymes have mostly been used as an economical substitute for enzymes. Viable cells make use of the respiratory and metabolic functions of the cell, the analyte to be monitored being either a substrate or an inhibitor of these processes. Bioluminescence-based microbial biosensors have also been developed using genetically engineered microorganisms constructed by fusing the lux gene with an inducible gene promoter for toxicity and bioavailability testing. In this review, some of the recent trends in microbial biosensors with reference to the advantages and limitations are been discussed. Some of the recent applications of microbial biosensors in environmental monitoring and for use in food, fermentation and allied fields have been reviewed. Prospective future microbial biosensor designs have also been identified.
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Affiliation(s)
- S F D'Souza
- Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
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Solid-phase reactor with copper(II) phosphate for flow-injection spectrophotometric determination of aspartame in tabletop sweeteners. Anal Chim Acta 1999. [DOI: 10.1016/s0003-2670(98)00828-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Gibbs BF, Alli I, Mulligan CN. Simple and rapid high-performance liquid chromatographic method for the determination of aspartame and its metabolites in foods. J Chromatogr A 1996; 725:372-7. [PMID: 8900578 DOI: 10.1016/0021-9673(95)01068-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A method for the determination of aspartame (N-L-alpha-aspartyl-L-phenylalanine methyl ester) and its metabolites, applicable on a routine quality assurance basis, is described. Liquid samples (diet Coke, 7-Up, Pepsi, etc.) were injected directly onto a mini-cartridge reversed-phase column on a high-performance liquid chromatographic system, whereas solid samples (Equal, hot chocolate powder, pudding, etc.) were extracted with water. Optimising chromatographic conditions resulted in resolved components of interest within 12 min. The by-products were confirmed by mass spectrometry. Although the method was developed on a two-pump HPLC system fitted with a diode-array detector, it is straightforward and can be transformed to the simplest HPLC configuration. Using a single-piston pump (with damper), a fixed-wavelength detector and a recorder/integrator, the degradation of products can be monitored as they decompose. The results obtained were in harmony with previously reported tedious methods. The method is simple, rapid, quantitative and does not involve complex, hazardous or toxic chemistry.
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Affiliation(s)
- B F Gibbs
- Food Science and Agricultural Chemistry Department, McGill University, Macdonald Campus, Que., Canada
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Nóbrega JDA, Fatibello-Filho O, Vieira IDC. Flow injection spectrophotometric determination of aspartame in dietary products. Analyst 1994; 119:2101-4. [PMID: 7978333 DOI: 10.1039/an9941902101] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A flow injection spectrophotometric method has been developed for the determination of aspartame in dietary products using ninhydrin as a colorimetric reagent. The reaction was conducted in a 1 + 1 v/v methanol-isopropanol medium also containing potassium hydroxide. The absorbance measurements were made at 603 nm. The results obtained for the determination of aspartame in table sweetener, pudding, gelatin, and refreshment (i.e., a powder dissolved in water for drinking) are in good agreement with the results obtained using a conventional manual procedure (correlation coefficient, r = 0.9984). Thirty-six results were obtained per hour, and the relative standard deviation was less than 3.5% (n = 6) for all samples. The detection limit (three times the signal blank/slope) was 3.8 x 10(-5) mol l-1 of aspartame.
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Affiliation(s)
- J de A Nóbrega
- Departamento de Química, Universidade Federal de São Carlos, SP, Brazil
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Male KB, Luong JH, Gibbs B, Konishi Y. An improved FIA biosensor for the determination of aspartame in dietary food products. Appl Biochem Biotechnol 1993; 38:189-201. [PMID: 8373154 DOI: 10.1007/bf02916400] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A flow injection analysis (FIA) biosensor system was developed for the determination of the artificial sweetener aspartame (L-aspartyl-L-phenylalanine methyl ester). The system consisted of an enzyme column of pronase immobilized on activated arylamine glass beads and a L-amino acid oxidase electrode connected in series. The dipeptide bond of aspartame was cleaved by immobilized pronase to release phenylalanine, which was in turn monitored by the enzyme electrode that used L-amino acid oxidase immobilized on a preactivated nylon membrane in combination with an amperometric electrode (platinum vs silver/silver chloride, 700 mV). The response of the FIA biosensor was linear up to 1 mM aspartame with a lower detection limit of 25 microM and had good reproducibility (rsd 0.3%). The FIA biosensor was stable for at least 30 h of continuous use at Tr. Each assay takes 4 min giving a sample throughput of 15 h-1. When applied to aspartame in dietary food products the results obtained agreed well with those reported by the product manufacturers.
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Affiliation(s)
- K B Male
- Biotechnology Research Institute, National Research Council Canada, Montreal, Quebec
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Biochemical fundamentals and improvement of the selectivity of microbial sensors - a minireview. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/0302-4598(91)87016-a] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Biochemical fundamentals and improvement of the selectivity of microbial sensors — a minireview. J Electroanal Chem (Lausanne) 1991. [DOI: 10.1016/0022-0728(91)85577-c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Affiliation(s)
- S P Hendry
- Biotechnology Centre, Cranfield Institute of Technology, U.K
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Riedel K, Renneberg R, Scheller F. Studies in peptide utilization by microorganisms using biosensor techniques. ACTA ACUST UNITED AC 1989. [DOI: 10.1016/0302-4598(89)80044-3] [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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Riedel K, Renneberg R, Scheller F. Studies in peptide utilization by microorganisms using biosensor techniques. J Electroanal Chem (Lausanne) 1989. [DOI: 10.1016/0022-0728(89)87303-6] [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]
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Coughlan MP, Kierstan MP, Border PM, Turner AP. Analytical applications of immobilised proteins and cells. J Microbiol Methods 1988. [DOI: 10.1016/0167-7012(88)90039-5] [Citation(s) in RCA: 11] [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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Riedel K, Renneberg R, Liebs P. Biochemical basis of a kinetically controlled microbial sensor. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/0302-4598(88)85012-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Riedel K, Renneberg R, Liebs P. Biochemical basis of a kinetically controlled microbial sensor. J Electroanal Chem (Lausanne) 1988. [DOI: 10.1016/0022-0728(88)87127-4] [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]
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Guilbault GG, Lubrano G, Kauffmann JM, Patriarche G. Enzyme electrodes for the sugar substitute aspartame. Anal Chim Acta 1988. [DOI: 10.1016/s0003-2670(00)80860-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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