Comparison of some modern IT equipment as detectors for microfluidic paper-based determination of phosphate

• Main Authors: Wongwilai W., Jayawardane B., Kolev S., Grudpan K., McKelvie I.
• Format: Journal
• Published: 2017
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84975687459&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/42561
• Institution: Chiang Mai University

© 2016, Chiang Mai University. All rights reserved. Modern Information Technology (IT) and communications equipment (mobiles phones, scanners, etc) may all be used as image capture devices for paper-based colorimetric analysis. This paper evaluates the use of a mobile phone, a webcam, a flatbed scanner and a handheld scanner as image capture devices for colorimetric determination of reactive phosphate using microfluidic paper-based analytical devices as the analytical platform. All four image capture devices tested gave similar analytical sensitivity and limits of detection (0.5-0.6 mg L -1 as P), although the handheld scanner and webcam exhibited non-linear responses over the range of concentrations tested, making them less suitable for field applications. The repeatability of the two scanners ( < 14% RSD) was superior to that of the mobile phone and webcam (ca 25% RSD). The flatbed scanner gave the best overall analytical performance.