Optical Microfiber Sensing of Adulterated Honey

• Published in: IEEE Sensors Journal
• Main Author: Irawati N.; Isa N.M.; Mohamed A.F.; Rahman H.A.; Harun S.W.; Ahmad H.
• Format: Article
• Language: English
• Published: Institute of Electrical and Electronics Engineers Inc. 2017
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85023619808&doi=10.1109%2fJSEN.2017.2725910&partnerID=40&md5=1b4dde2d4d90b6808410636de75065a0

A simple microfiber sensor is proposed and demonstrated for the detection of honey adulteration. The sensor uses a polymer microfiber and a silica microfiber probe. The polymer microfiber is fabricated using a direct drawing method from molten poly (methyl methacrylate) and has a waist of 2.3μm and a length of 3 mm, whereas the silica microfiber is fabricated using the flame brushing technique and has a waist of 2.5μm and a length of 3 mm. The probe is immersed in a honey adulteration solution and senses the relative honey adulteration using intensity modulation technique. Six types of honey samples were adulterated with different percentages of glucose. As honey adulteration varies from 1% to 6%, the transmission power of the polymer microfiber decreases from 3.51 to 1.15μ W with a sensitivity of 0.49μW% and a linearity of more than 96.97%. Meanwhile, the transmission power of the silica microfiber decreases from 14 to 7μW with a sensitivity of 1.37μ W% and a linearity of more than 96.80%. © 2001-2012 IEEE.