Development of on-site, real-time, multi-analytical technology of heavy metals in the environment based on optical waveguide spectroscopy

2016 Fiscal Year Final Research Report

• Project/Area Number: 26289178
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Civil and environmental engineering
• Research Institution: Hokkaido University
• Principal Investigator: Satoh Hisashi 北海道大学, 工学(系)研究科(研究院), 准教授 (80326636)
• Co-Investigator(Kenkyū-buntansha): 山田 幸司 北海道大学, 地球環境科学研究科(研究院), 准教授 (30348825) ; 山村 寛 中央大学, 理工学部, 准教授 (40515334)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: センサ

Outline of Final Research Achievements

Simple analytical methods are needed for determining the cadmium (Cd) content of brown rice samples. In the present study, we developed a new analytical procedure. Digestion with 0.1 M HCl for 10 min at room temperature was sufficient to extract Cd from the ground rice samples. The Cd in the extract was successfully purified in preference to other metals using Dowex 1X8 chloride form resin. Low concentrations of Cd in the eluate could be determined using fluorescence spectroscopy with a fluoroionophore. Overall, the actual limit of quantification value for the Cd content in rice was about 0.1 mg/kg, which was sufficiently low compared with the regulatory value (0.4 mg/kg) given by the Codex Alimentarius Commission. We analyzed authentic brown rice samples using our new analytical procedure and the results agreed well with those determined using inductively coupled plasma optical emission spectrometry (ICP-OES).

Free Research Field

水環境工学