環境水中ジェオスミンの三つの定量法による測定値の差の要因

神門 利之; 大城 等; 野尻 由香里; 管原 庄吾; 神谷 宏; 清家 泰

doi:10.2116/bunsekikagaku.64.769

Analytical Reports

Factors concerning the Difference in Results among Three Determination Methods for Geosmin in Environmental Water

Toshiyuki GODO, Hitoshi OHSHIRO, Yukari NOJIRI, Shogo SUGAHARA, Hiroshi KAMIYA, Yasushi SEIKE

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Keywords: analytical methods of musty-odor substances, geosmin, gas chromatograph mass spectrometry, Coelosphaerium kuetzingiamum

JOURNAL FREE ACCESS

2015 Volume 64 Issue 10 Pages 769-773

DOI https://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.2116/bunsekikagaku.64.769

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Abstract

Geosmin concentrations of Lake Shinji were compared with three measurement methods that were defined in the clean water test method. Because geosmin was mainly contained in algal cells, the concentration measured by solid-phase extraction - gas chromatograph mass spectrometry (SP-GC/MS), which carried out filtration, was extremely low. When comparing the measured concentrations of purge trap-gas chromatograph mass spectrometry (PT-GC/MS) and the head space - gas chromatograph mass spectrometry (HS-GC/MS), the value of the latter was higher. The reason was thought to be that the former is heated to 40°C, but the latter is heated at a high temperature of 80°C, and thus the algal cells are more degraded; therefore geosmin, which was present in the body, was eluted. Like this, it became clear that the concentration of geosmin differs depending on the measurement method.

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