Green analytical flow method for the determination of total sulfite in wine using membraneless gas–liquid separation with contactless conductivity detection

Chantipmanee, Nattapong; Alahmad, Waleed; Sonsa‐ard, Thitaporn; Uraisin, Kanchana; Ratanawimarnwong, Nuanlaor; Mantim, Thitirat; Nacapricha, Duangjai

doi:10.1039/c7ay01879g

Cited by 19 publications

(10 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The C4D detection flow cell [23,24,26] is a polyether ether ketone (PEEK) tubing (1.0 mm i.d., 1.6 mm o.d.) with two cylindrical bands of painted silver conductive ink (2.0 cm long and 0.5 mm apart) as electrodes.…”

Section: Flow Systems and Operationmentioning

confidence: 99%

“…C4D has advantages over conventional conductivity detector for flow systems since the electrodes are easily mounted on the outer wall of the flow tube and is robust in use. Several applications of MBL-VP-C4D for the analysis of volatile gases converted from ionic analytes have been presented, such as dissolved ammonium and sulfide in canal water [23] and sulfite in wines [24].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Simple Flow-Based System with an In-Line Membrane Gas–Liquid Separation Unit and a Contactless Conductivity Detector for the Direct Determination of Sulfite in Clear and Turbid Food Samples

et al. 2020

Self Cite

View full text Add to dashboard Cite

This study presents a simple flow-based system for the determination of the preservative agent sulfite in food and beverages. The standard method of conversion of sulfite ions into SO2 gas by acidification is employed to separate the sulfite from sample matrices. The sample is aspirated into a donor stream of sulfuric acid. A membrane gas–liquid separation unit, also called a ‘gas-diffusion (GD)’ unit, incorporating a polytetrafluoroethylene (PTFE) hydrophobic membrane allows the generated gas to diffuse into a stream of deionized water in the acceptor line. The dissolution of the SO2 gas leads to a change in the conductivity of water which is monitored by an in-line capacitively coupled contactless conductivity detector (C4D). The conductivity change is proportional to the concentration of sulfite in the sample. In this work, both clear (wine) and turbid (fruit juice and extracts of dried fruit) were selected to demonstrate the versatility of the developed method. The method can tolerate turbidity up to 60 Nephelometric Turbidity Units (NTUs). The linear range is 5–25 mg L−1 SO32− with precision <2% RSD. The flow system employs a peristaltic pump for propelling all liquid lines. Quantitative results of sulfite were statistically comparable to those obtained from iodimetric titration for the wine samples.

show abstract

Section: Flow Systems and Operationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simple Flow-Based System with an In-Line Membrane Gas–Liquid Separation Unit and a Contactless Conductivity Detector for the Direct Determination of Sulfite in Clear and Turbid Food Samples

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Carbon dioxide was diffused from an acidified seawater sample across a semipermeable membrane into an acceptor stream (aqueous alkaline solution) and changes in conductivity, which were directly related to CO 2 content in the sample, were monitored by C 4 D . Similarly, C 4 D was also employed in sequential injection analysis (SIA) for the determination of sulfite in wines and of ammonium and sulfide in canal water . In these cases, separations of the analytes were carried out in membraneless gas diffusion cells.…”

Section: Other Applications Of C4dmentioning

confidence: 99%

Contactless conductivity detection for analytical techniques: Developments from 2016 to 2018

Kubáň

Hauser

2018

Electrophoresis

View full text Add to dashboard Cite

The publications concerning capacitively coupled contactless conductivity detection for the 2-year period from mid-2016 to mid-2018 are covered in this update to the earlier reviews of the series. Relatively few reports on fundamental investigations or new designs have appeared in the literature in this time interval, but the development of new applications with the detection method has continued strongly. Most often, contactless conductivity measurements have been employed for the detection of inorganic or small organic ions in conventional capillary electrophoresis, less often in microchip electrophoresis. A number of other uses, such as detection in chromatography or the gauging of bubbles in streams have also been reported.

show abstract

“…Thus, sample throughputs are up to 60 samples per hour [1,[11][12][13]. Almost all kinds of detection can be coupled to the above flow-based techniques, including UV-Vis absorbance [14][15][16][17][18][19][20][21][22], fluorescence [22][23][24], chemiluminescence [25,26], electrochemical detections (amperometry) [27][28][29][30], conductivity [31] and contactless conductivity [32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Dual-Purpose Photometric-Conductivity Detector for Simultaneous and Sequential Measurements in Flow Analysis

et al. 2020

Self Cite

View full text Add to dashboard Cite

This work presents a new dual-purpose detector for photometric and conductivity measurements in flow-based analysis. The photometric detector is a paired emitter–detector diode (PEDD) device, whilst the conductivity detection employs a capacitively coupled contactless conductivity detector (C4D). The flow-through detection cell is a rectangular acrylic block (ca. 2 × 2 × 1.5 cm) with cylindrical channels in Z-configuration. For the PEDD detector, the LED light source and detector are installed inside the acrylic block. The two electrodes of the C4D are silver conducting ink painted on the PEEK inlet and outlet tubing of the Z-flow cell. The dual-purpose detector is coupled with a sequential injection analysis (SIA) system for simultaneous detection of the absorbance of the orange dye and conductivity of the dissolved oral rehydration salt powder. The detector was also used for sequential measurements of creatinine and the conductivity of human urine samples. The creatinine analysis is based on colorimetric detection of the Jaffé reaction using the PEDD detector, and the conductivity of the urine, as measured by the C4D detector, is expressed in millisiemens (mS cm−1).

show abstract

Green analytical flow method for the determination of total sulfite in wine using membraneless gas–liquid separation with contactless conductivity detection

Abstract: New and green automated flow-method based on membraneless vaporization technique suitable for monitoring of total sulfite in wine.

Cited by 19 publications

References 30 publications

Simple Flow-Based System with an In-Line Membrane Gas–Liquid Separation Unit and a Contactless Conductivity Detector for the Direct Determination of Sulfite in Clear and Turbid Food Samples

Simple Flow-Based System with an In-Line Membrane Gas–Liquid Separation Unit and a Contactless Conductivity Detector for the Direct Determination of Sulfite in Clear and Turbid Food Samples

Contactless conductivity detection for analytical techniques: Developments from 2016 to 2018

Dual-Purpose Photometric-Conductivity Detector for Simultaneous and Sequential Measurements in Flow Analysis

Contact Info

Product

Resources

About