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Sensing in Flow Analysis 2017
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Sensing in Flow Analysis 2017

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Chemical Sensors".

Deadline for manuscript submissions: closed (31 October 2017) | Viewed by 10746

Special Issue Editor

Prof. Dr. Spas D. Kolev

E-Mail Website
Guest Editor
School of Chemistry, The University of Melbourne, Melbourne, VIC 3010, Australia
Interests: ion-exchange and liquid membranes; membrane applications in passive sampling; flow analysis; water treatment; chemical sensing; synthesis of metal nanoparticles
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The chemical sensor in a flow analysis system is crucial for determining its analytical performance, cost, and possibilities for its miniaturization and automation. The rapid progress in sensor science in recent years has resulted in the development of flow analysis systems with enhanced analytical capabilities. At the same time, novel and exciting applications of established sensors in flow analysis have also been reported in the literature. Therefore, we have decided that it is timely to compose a Special Issue of Sensors focusing on the important role sensors play in flow analysis. You are invited to submit manuscripts illustrating the suitability of newly developed sensors for flow analysis applications, as well as manuscripts describing novel applications of established sensors in solving real life analytical problems.

Prof. Dr. Spas D. Kolev
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • sensors
  • flow injection analysis
  • sequential injection analysis
  • bead injection analysis
  • lab-on-valve flow analysis
  • microfluidic paper-based analytical devices
  • micro total analysis systems

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Published Papers (2 papers)

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Research

2348 KiB  
Article
Development of a Sequential Injection Analysis System for the Determination of Saccharin
by Budi Wibowotomo, Jong-Bang Eun and Jong Il Rhee
Sensors 2017, 17(12), 2891; https://doi.org/10.3390/s17122891 - 12 Dec 2017
Cited by 3 | Viewed by 4998
Abstract
Saccharin is a powerfully sweet nonnutritive sweetener that has been approved for food-processing applications within the range of 100–1200 mg/kg. A simple, rapid, and cost-effective sequential injection analysis (SIA) technique was developed to determine the saccharin level. This method is based on the [...] Read more.
Saccharin is a powerfully sweet nonnutritive sweetener that has been approved for food-processing applications within the range of 100–1200 mg/kg. A simple, rapid, and cost-effective sequential injection analysis (SIA) technique was developed to determine the saccharin level. This method is based on the reaction of saccharin with p-chloranil in an ethanol medium with a hydrogen peroxide (H2O2) acceleration, and the resultant violet-red compound was detected using a UV-Vis spectrophotometer at λmax = 420 nm. To ascertain the optimal conditions for the SIA system, several parameters were investigated, including buffer flow rate and volume, p-chloranil concentration, and reactant volumes (saccharin, p-chloranil, and H2O2). The optimum setup of the SIA system was achieved with a buffer flow rate, buffer volume, and draw-up time of 1.2 mL/min, 2900 µL, and ~145 s, respectively. The optimal p-chloranil concentration is 30 mM, and the best reactant volumes, presented in an ordered sequence, are as follows: 30 µL of H2O2, 450 µL of saccharin, and 150 µL of p-chloranil. The optimized SIA configuration produced a good linear calibration curve with a correlation coefficient (R2 = 0.9812) in the concentration range of 20–140 mg/L and with a detection limit of 19.69 mg/L. Analytical applications in different food categories also showed acceptable recovery values in the range of 93.1–111.5%. This simple and rapid SIA system offers great feasibility for the saccharin quality control in food-product processing. Full article
(This article belongs to the Special Issue Sensing in Flow Analysis 2017)
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4265 KiB  
Article
The Detection of Water Flow in Rectangular Microchannels by Terahertz Time Domain Spectroscopy
by Yan Song, Kun Zhao, Jian Zuo, Cuicui Wang, Yizhang Li, Xinyang Miao and Xiaojing Zhao
Sensors 2017, 17(10), 2330; https://doi.org/10.3390/s17102330 - 13 Oct 2017
Cited by 11 | Viewed by 5090
Abstract
Flow characteristics of water were tested in a rectangular microchannel for Reynolds number (Re) between 0 and 446 by terahertz time domain spectroscopy (THz-TDS). Output THz peak trough intensities and the calculated absorbances of the flow were analyzed theoretically. The results [...] Read more.
Flow characteristics of water were tested in a rectangular microchannel for Reynolds number (Re) between 0 and 446 by terahertz time domain spectroscopy (THz-TDS). Output THz peak trough intensities and the calculated absorbances of the flow were analyzed theoretically. The results show a rapid change for Re < 250 and a slow change as Re increases, which is caused by the early transition from laminar to transition flow beginning nearly at Re = 250. Then this finding is confirmed in the plot of the flow resistant. Our results demonstrate that the THz-TDS could be a valuable tool to monitor and character the flow performance in microscale structures. Full article
(This article belongs to the Special Issue Sensing in Flow Analysis 2017)
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