Establishment of high-sensitivity simultaneous analysis of water pollutants using droplet concentration method and separation material

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K12153
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 63010:Environmental dynamic analysis-related
• Research Institution: National Institute of Technology, Toyama College
• Principal Investigator: Manaka Atsushi 富山高等専門学校, 物質化学工学科, 准教授 (90413757)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 濃縮

Outline of Final Research Achievements

We were able to confirm an improvement in the detection sensitivity of heavy metals compared to before concentration by droplet concentration of this method.　However, although an increase in sensitivity was observed, it was not possible to completely compensate for the large sensitivity loss on a thin-layer chromatographic plate, and it was found that analysis at the environmental standard level was difficult. Therefore, we attempted to increase the sensitivity by a cascade-type concentration method that combines solid-phase extraction and droplet concentration.　 Therefore, we attempted to increase the sensitivity by a cascade-type concentration method that combines solid-phase extraction and droplet concentration.　 As a result, it was clarified that it has sufficient sensitivity even on the surface of a thin layer. Moreover, we also found that not only heavy metals but also fine particles that are insoluble in solutions can be concentrated by this concentration method.

Free Research Field

分析化学、環境科学

Academic Significance and Societal Importance of the Research Achievements

学術的意義：本濃縮法により、薄層クロマトグラフィー(TLC)の高感度化への可能性を明らかにした。TLCは比較的低コストでの分離分析が可能であるが、感度が低く定量分析には不向きであったが、本研究により高い感度と分離性能を併せもつ手法への発展が期待できる。また、重金属類だけでなくマイクロプラスチックなどの微粒子状の汚染物質の濃縮の可能性も見出せた。
社会的意義：これまで、大型の分析装置で分析していた微量の環境汚染物質が簡便・迅速に計測できることで、資金・時間・人材が限られる世の中で、より効率的な環境汚染状況を把握することが可能となり、国内外の人達の健康を守る技術として貢献できるものと思われる。