含有机质沉积物中稳定碳同位素的测定方法

IF 0.5 Q4 CHEMISTRY, MULTIDISCIPLINARY

Journal of Siberian Federal University. Chemistry Pub Date : 2021-09-01 DOI:10.17516/1998-2836-0251

E. Lazareva

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引用次数: 0

摘要

对堪察加乌松火山口富玛洛诺耶热湖含有机质底泥进行了碳同位素组成研究。本文给出了连续提取H3PO4 2小时、24小时和7天热湖底泥δ13C变化的研究结果。以两个样品为例，给出了δ13С随时间和HCl和H2O2处理后的变化情况。经HCl处理后，δ13С值相对于初始值的变化范围为1 ~ 3‰，在解释数据时可以考虑到这一点。用过氧化氢除去碳酸盐的标准程序表明，在高温下与H3PO4长时间反应时，残余含C物质发生了显著的转变

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Specific of Stable Carbon Isotopes Determination in Organic-Bearing Sediments

The study of the carbon isotopic composition in organic-bearing bottom sediments of the thermal lake Fumarolnoye (Uzon caldera, Kamchatka) has been carried out. The results of studying δ13C changes in the bottom sediments of a thermal lake during the sequential extraction of H3PO4 for 2 hours, 24 hours and 7 days are presented. The change in δ13С with time and after treatment with HCl and H2O2 is shown using two samples as an example. After treatment with HCl, the δ13С values change relative to the initial ones from 1 to 3 ‰, which can be taken into account when interpreting the data. The standard procedure for removing carbonate with hydrogen peroxide reveals a significant transformation of the residual C‑containing substance in the case of a prolonged reaction with H3PO4 at elevated temperatures

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来源期刊

Journal of Siberian Federal University. Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

1.10

自引率

0.00%

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