Fibre Optic Sensor for Food Safety Applications Repository

Fibre Optic Sensor for Food Safety Applications

Moh. Yasin and Andi Hamim Zaidan (2018) Fibre Optic Sensor for Food Safety Applications. Laporan Penelitian. UNIVERSITAS AIRLANGGA, Surabaya.

Text (LAPORAN PENELITIAN)
KKC KK LP 32-19 Yas f.pdf
Download (7MB)

Official URL: http://www.lib.unair.ac.id

Abstract

Food contamination (intentional or unintentional) can occur at any stage of the food supply chain from the primary producer and manufacturers through the food services outlet to the end user. The critical challenges for efficient food safety control are: fast detection, contamination range and detection cost. Although the technology developed in this project will have a broad impact on many areas of the food industry, our main focus here is on a specific problem which is vitally important for developing countries — formalin contamination in food. Though strictly forbidden in developed countries, formalin, a chemical used to stop dead bodies from rotting, is often used illegally by dishonest traders in developing countries (and is a major problem in Indonesia). The formalin is used to preserve food, such as fish, fruit, tofu and noodles, to keep them fresh or look more attractive for longer. This has become a serious issue of food safety, as formalin is poisonous, causes vomiting, diarrhoea and urine mixed with blood, even leading to death. In addition, long term of exposure to formalin can cause cancer. The current detection methods are mostly based on the use of Chromotropic acid and Helmer-Fulton tests which are time-consuming and insensitive. Hence a sensitive, low cost detector is urgently needed. In this progress report, we have successfully investigated the use of a whispering gallery mode (WGM) optical micro- bottle resonator (MBR) for liquid formaldehyde (CH20) sensing. The MBR was fabricated via the "soften-and-compress" method to create a bulge (bottle) structure with a bottle diameter of 190 pm. The MBR was optically excited by using a non-adiabatic 2 pm optical microfiber and was found to have a Q-factor of >105. The MBR was then employed to measure formaldehyde concentration within 1-5% range and the performance was compared with a bare microfiber. The MBR sensor was found to have a sensitivity of 4.397 c113/% with 90% linearity which were superior to the bare microfiber. The MB R sensor was also found to have good repeatability and stability over a period of 60 min. This indicates that MBR sensor has a great potential to be employed as a low cost formaldehyde liquid sensor.

Item Type:

Monograph (Laporan Penelitian)

Additional Information:

KKC KK LP 32-19 Yas f

Uncontrolled Keywords:

Fibre Optic Sensor, Food Safety

Subjects:

T Technology > TX Home economics > TX341-641 Nutrition. Foods and food supply

Divisions:

08. Fakultas Sains dan Teknologi > Fisika

Creators: