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Ratanawimarnwong N, Suksomphot V, Sornpipatpong K, Lengwan S, Donpudsa S, Choengchan N, Mantim T. Microfluidic paper-based analytical device for determination of sucrose in sugarcane juice using Benedict's reagent. Anal Bioanal Chem 2022; 414:7783-7791. [PMID: 36068346 DOI: 10.1007/s00216-022-04312-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 08/08/2022] [Accepted: 08/30/2022] [Indexed: 11/01/2022]
Abstract
This work presents a microfluidic paper-based analytical device (μPAD) for the determination of sucrose using the Benedict's test. An asymmetric dumbbell-shaped hydrophobic barrier was produced by rubber stamping the barrier pattern onto a laboratory filter paper. Hydrochloric acid and solution containing sucrose were successively deposited onto the sample reservoir of the μPAD attached to a glass slide. The device was placed in a plastic bag and dipped into boiling water for accelerating the hydrolysis of sucrose into the reducing sugars. Then the Benedict's reagent was added at the narrow straight channel connecting the two circular zones of the μPAD, which was replaced in the plastic bag and heated again for reduction of Cu(II) by the reducing sugars. Precipitate of brick-red copper(I) oxide was formed. The image of the μPAD was recorded by a smartphone. The ratio of the red to blue intensities gave linear correlation with the concentration of sucrose in the range of 0.5-10% w/v. The relative standard deviation of the measurement was less than 5% for 2 and 4% w/v sucrose (n = 10), with limit of determination, calculated using standard deviation of regression divided by slope of calibration, of 0.26% w/v sucrose. The method was successfully validated using the dinitrosalicylic acid method for sucrose measurement. Percent recoveries of sucrose were evaluated using ten sugarcane samples. The recoveries were in the range of 89 to 101%, demonstrating that there were no significant sample matrix effects on the quantification.
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Affiliation(s)
- Nuanlaor Ratanawimarnwong
- Department of Chemistry, Faculty of Science, Srinakharinwirot University, Bangkok, 10110, Thailand. .,Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Bangkok, Thailand.
| | - Vanlada Suksomphot
- Department of Chemistry, Faculty of Science, Srinakharinwirot University, Bangkok, 10110, Thailand
| | - Khemika Sornpipatpong
- Department of Chemistry, Faculty of Science, Srinakharinwirot University, Bangkok, 10110, Thailand
| | - Supamit Lengwan
- Department of Chemistry, Faculty of Science, Srinakharinwirot University, Bangkok, 10110, Thailand
| | - Suchao Donpudsa
- Department of Chemistry, Faculty of Science, Srinakharinwirot University, Bangkok, 10110, Thailand
| | - Nuthawut Choengchan
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Bangkok, Thailand.,Department of Chemistry, Faculty of Science, King Mongkut's Institute of Technology, Bangkok, 10520, Thailand
| | - Thitirat Mantim
- Department of Chemistry, Faculty of Science, Srinakharinwirot University, Bangkok, 10110, Thailand.,Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Bangkok, Thailand
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Sequential Injection System for Analysis of Degree Brix, Orthophosphate and pH in Raw Sugarcane Juice Applicable to Sugar Industry. Molecules 2021; 26:molecules26216484. [PMID: 34770888 PMCID: PMC8587050 DOI: 10.3390/molecules26216484] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/14/2021] [Accepted: 10/23/2021] [Indexed: 11/22/2022] Open
Abstract
This work presents, for the first time, a new sequential injection analysis (SIA) method to simultaneously analyze degree Brix, orthophosphate and pH in raw cane juice. These key parameters relate to price of harvested sugarcane and quality of cane juice for sugar production. The SIA system employed two detectors: the first detector is a diode-array spectrophotometer, equipped with a regular flow cell, for measurements of degree Brix and orthophosphate. Quantitative of degree Brix (°Bx; ca. % (w/w) sucrose) was based on manipulation of the schlieren effect at the interface between plugs of sample and water. Orthophosphate analysis was carried out based on the molybdenum blue method with significant reduction in consumption of the reagents. Compensation of the schlieren effect from sucrose for determination of orthophosphate was achieved by using a dual-wavelength spectrometric detection. Second detector is a pH-sensing device, called ion-selective field-effect transistors (ISFET). The ISFET is based on the current through the ISFET arising according to the H+ concentration in solution. Our developed SIA system provides linear calibration graphs fitting for purpose in analysis of sugarcane juice (pH: 0–14, °Bx: 1.0–7.0 and P2O5: 20–200 mg L−1). Simultaneous analysis of sugarcane juice for pH, °Bx and P2O5 is carried out within 5 min (12 sample per h). Precision of SIA system is acceptable (RSD < 3%). Our SIA system gave quantitative results insignificantly different, as compared with conventional methods for analysis of pH, °Bx and P2O5 in sugarcane juice.
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Cadena PG, Wiggers FN, Silva RA, Lima Filho JL, Pimentel MCB. Kinetics and bioreactor studies of immobilized invertase on polyurethane rigid adhesive foam. BIORESOURCE TECHNOLOGY 2011; 102:513-518. [PMID: 20875737 DOI: 10.1016/j.biortech.2010.08.096] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2010] [Revised: 08/20/2010] [Accepted: 08/24/2010] [Indexed: 05/29/2023]
Abstract
A new support, polyurethane rigid adhesive foam (PRAF), which can be used to cover internal surface of metallic tubes, was used to immobilize invertase for application in an enzymatic bioreactor. The kinetic parameters were: Km--46.5±1.9 mM (PRAF-invertase) and 61.2±0.1 mM (free enzyme) and Vmax 42.0±4.3 U/mg protein/min (PRAF-invertase) and 445.3±24.0 U/mg protein/min (free invertase). The PRAF-invertase derivative maintained 50.1% of initial activity (69.17 U/g support) for 8 months (4°C) and was not observed microbial contamination. The bioreactor showed the best production of inverted sugar syrup using up-flow rate (0.48 L/h) with average conversion of 10.64±1.5% h(-1) at feeding rate (D) of 104 h(-1). The operational inactivation rate constant (kopi) and half-life were 1.92×10(-4) min(-1) and 60 h (continue use). The PRAF spray support looks promising as a new alternative to produce immobilized derivatives on reactor surfaces.
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Affiliation(s)
- Pabyton G Cadena
- Laboratório de Imunopatologia Keizo Asami (LIKA), Universidade Federal de Pernambuco (UFPE), Av. Prof. Moraes Rego, s/n, 50780-901 Recife, Pernambuco, Brazil
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Alves ER, Fortes PR, Borges EP, Zagatto EA. Spectrophotometric flow-injection determination of total reducing sugars exploiting their alkaline degradation. Anal Chim Acta 2006. [DOI: 10.1016/j.aca.2006.01.088] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Tumang CA, Tomazzini MC, Reis BF. Automatic Procedure Exploiting Multicommutation in Flow Analysis for Simultaneous Spectrophotometric Determination of Nonstructural Carbohydrates and Reducing Sugar in Forage Materials. ANAL SCI 2003; 19:1683-6. [PMID: 14696938 DOI: 10.2116/analsci.19.1683] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A multicommutated flow procedure for simultaneous spectrophotometric determination of nonstructural carbohydrates and reducing sugar in forage materials is proposed. Determination of both analytes was based on the neucroine method after acid hydrolysis of nonstructural carbohydrates. Results for both analytes presented the following features: no significant difference at 90% confidence level when compared with reference method, linear response between 0.2 to 0.8% (w/v) (r = 0.999); relative standard deviations of < 2.0% (n = 10), and sampling rate of 32 determinations per hour.
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Silva FV, Souza GB, Nogueira ARA. USE OF YEAST CRUDE EXTRACT FOR SEQUENTIAL INJECTION DETERMINATION OF CARBOHYDRATES. ANAL LETT 2001. [DOI: 10.1081/al-100104161] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Flow injection spectrophotometric determination of reducing sugars using a focalized coiled reactor in a domestic microwave oven. Talanta 1999; 50:899-904. [DOI: 10.1016/s0039-9140(99)00180-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/1998] [Revised: 06/02/1999] [Accepted: 06/03/1999] [Indexed: 11/15/2022]
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Batch injection analysis for the determination of sucrose in sugar cane juice using immobilized invertase and thermometric detection. Biosens Bioelectron 1999. [DOI: 10.1016/s0956-5663(98)00105-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Fung YS, Mo SY. Application of dual-pulse staircase voltammetry for simultaneous determination of glucose and fructose. ELECTROANAL 1995. [DOI: 10.1002/elan.1140070212] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Michao̵wski J, Kojo̵ A, Trojanowicz M, Szostek B, Zagatto EA. Simultaneous determination of sucrose and reducing sugars using indirect flow-injection biamperometry. Anal Chim Acta 1993. [DOI: 10.1016/0003-2670(93)80051-l] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Mattos I, Zagatto E, Jacintho A. Spectrophotometric flow-injection determination of sucrose and total reducing sugar in sugar-cane juice and molasses. Anal Chim Acta 1988. [DOI: 10.1016/s0003-2670(00)80446-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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