• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2003 Fiscal Year Final Research Report Summary

A Study on a Multichannel Ordor Sensor Based on Color Information

Research Project

Project/Area Number 13650871
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 工業分析化学
Research InstitutionOita University

Principal Investigator

OHGA Kazuya  Oita University, Faculty of Engineering, Professor, 工学部, 教授 (60037992)

Co-Investigator(Kenkyū-buntansha) INOUE Takanori  Oita University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (40243969)
KURAUCHI Yoshiaki  Oita University, Faculty of Engineering, Research Assistant, 工学部, 助手 (60117398)
Project Period (FY) 2001 – 2003
KeywordsOdor sensor / Dye / Optical fiber / Color information / Citrus fruits / Coffee / Principal component analysis
Research Abstract

The aim of this research is to construct a multichannel odor-sensing system based on the color changes of dyes upon contact with odor gases. The response elements were composed of an array of dyes, 5,10,15,20-tetraphenyl-21H,23H-porphin and the Cu(II),Zn(II),Mn(II),Co(II),Fe(II) complexes, a Reichardt's dye, pH indicators (Thymol Blue, Methyl Orange, Methyl Red, Phenol Red, Phenolphthalein and Alizarin Yellow) and acceptors of charge transfer complexes, adsorbed on C18 and C2 reverse-phase TLC plates and a silica-gel one ; color images of the dye elements obtained with a scanner were analyzed to give the gray levels of red, green and blue components. Differences between the gray levels before and after exposure to various kinds of volatile organic compounds suggested that the proposed sensing system was capable of detecting target gases even in the presence of a large quantity of water vapor, and thus was applicable to many odor gases without any pretreatment. A principal component analysis discriminated between citrus fruits, kabosu, lemon, navel orange and grapefruits, and between regular coffees, canned coffees with sugar and canned black coffees, using the gray level differences of some pH-indicator image components as multivariable data. An optical fiber having an Alizarin Yellow/polyvinylpyrrolidone at the cladding part and a thin gold or silver film on an end surface was used as a sensing element; a decrease in the signal intensity of halogen-lamp light reflected from the fiber was observed at around 630 nm when the fiber was exposed to principal odor components of citrus fruits, linalyl acetate and linalool.

  • Research Products

    (2 results)

All 2005

All Journal Article (2 results)

  • [Journal Article] pH指示薬/ポリビニルピロリドン膜の色変化に基づくにおいセンシング2005

    • Author(s)
      西村 聡
    • Journal Title

      分析化学 54

      Pages: 51-56

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Odor Sensing Based on the Color Changes of pH Indicator/Polyvinylpyrrolidone Films2005

    • Author(s)
      Satoshi NISHIMURA, Takanori INOUE, Yoshiaki KURAUCHI, Kazuya OHGA
    • Journal Title

      BUNSEKI KAGAKU 54(1)

      Pages: 51-56

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2006-07-11  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi