Next Article in Journal
Optimization of Perovskite Gas Sensor Performance: Characterization, Measurement and Experimental Design
Previous Article in Journal
A Sparse Bayesian Approach for Forward-Looking Superresolution Radar Imaging
Article Menu
Issue 6 (June) cover image

Export Article

Open AccessArticle
Sensors 2017, 17(6), 1354; doi:10.3390/s17061354

Development and Validation of a New Near-Infrared Sensor to Measure Polyethylene Glycol (PEG) Concentration in Water

1
Priority Research Centre for Geotechnical and Materials Modelling, University of Newcastle, Callaghan NSW 2308, Australia
2
School of Electrical Engineering and Computer Science, University of Newcastle, Callaghan NSW 2308, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: W. Rudolf Seitz
Received: 5 May 2017 / Revised: 8 June 2017 / Accepted: 9 June 2017 / Published: 10 June 2017
(This article belongs to the Section Chemical Sensors)
View Full-Text   |   Download PDF [2733 KB, uploaded 12 June 2017]   |  

Abstract

A near-infrared absorption based laser sensor has been designed and validated for the real-time measurement of polyethylene glycol (PEG) concentration. The wavelength was selected after the determination of the absorption spectrum of deionised water and PEG solutions using a Varian Cary 6000i spectrophotometer, in order to limit the influence of PEG molecular mass on the absorption measurement. With this new sensor, the water is treated as the attenuating species and the addition of PEG in water reduces the absorbance of the medium. The concept was validated using three different PEG types (PEG 6,000, 20,000, and 35,000) and it was found that the results follow Beer Lambert’s law. The influence of temperature was assessed by testing the PEG 20,000 at four different temperatures that could be encountered in a laboratory environment. The data show a slight temperature influence (increase of absorbance by 8% when the temperature rises from about 20 to about 29 degrees). Following the validation phase conducted ex situ, a prototype of an immersible sensor was built and calibrated for in situ measurements. View Full-Text
Keywords: fibre optic sensor; distributed feedback laser; polyethylene glycol (PEG); near-infrared fibre optic sensor; distributed feedback laser; polyethylene glycol (PEG); near-infrared
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Buzzi, O.; Yuan, S.; Routley, B. Development and Validation of a New Near-Infrared Sensor to Measure Polyethylene Glycol (PEG) Concentration in Water. Sensors 2017, 17, 1354.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top