Journal of the Graduate School of Biosphere Science, Hiroshima University Volume 52
2013-12-25 発行

CHN分析計による沿岸域における粒状有機炭素の定量法の検討 : 無機炭素の影響について

Determination of organic carbon in coastal marine particles with a CHN analyzer : effects of inorganic carbon
Hanada, Koji
Ikeda, Daiki
Terakado, Ayako
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abstract
Organic carbon and nitrogen were generally determined with a CHN analyzer after removing carbonate by acidification of samples with liquid acid or HCl vapor. However, some workers have conducted the CHN measurements for coastal marine particles without the acidification and reported their analytical values as POC. Here, we compared the carbon values of the CHN measurements with or without acid treatment (HCl vapor) to suspended, settling particles and sediments in Seto Inland Sea. As a result, the carbon values of samples without acidification were significantly higher than those of untreated ones. Overall, our results indicate the acidification of samples is an indispensable procedure for determining POC in various marine particles.
subject
粒状有機炭素
粒状無機炭素
海洋粒子
CHN分析計
酸処理
particulate organic carbon
particulate inorganic carbon
marine particles
CHN analyzer
acidification