RANCANG BANGUN ELECTRONIC NOSE UNTUK MENDETEKSI TINGKAT KEBUSUKAN IKAN AIR TAWAR ELECTRONIC NOSE DESIGN TO DETECT ROTTENNESS LEVEL OF FRESHWATER FISH

Lintang, Chrisal A, Triyogatama

2015 | Skripsi | FMIPA UGM

Fish is a food that consumed in all over the world. When fish die, the freshness of the fish start to reduce gradually until it cannot be eaten anymore. The properness of fish meat can be identified by odor that come from the fish itself. An instrument called electronic nose that can detect the pattern of fish odor has been designed and implemented in this research. To be able to detect the scent of freshwater fish, electronic nose system will drain the air from the sample chamber to sensor chamber using fan. When taking sample aroma (odor on) fan will drain the air containing sample scent from the sample chamber to sensor chamber, and air from the outside flowed into sensor chamber at odor off. Stimulus scent captured by the sensor array in the form of signal response will be extracted with integral method so that the digital fingerprint from the samples obtained. This pattern then analyzed by PCA (Principal Component Analysis) to determine patterns of freshwater fish odor. The result from this study indicated that electronic nose system can detect the scent of freshwater fish with the percentage variance of two major components of 98.7% (pomfret), 98.8% (catfish), and 99.5% (tilapia). Sensors that give the high response in each samples is TGS 2620, and TGS 2600. TGS 822 give high response when the fish is rotting

Kata Kunci : Fish; electronic nose; array sensor; flow air.