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논문 기본 정보

자료유형
학술저널
저자정보
Young-Jae Jeong (Chonnam National University) Su-Jin Lee (Chonnam National University) Sang-Sun Lim (CJ Cheiljedang) Woo-Jung Choi (Chonnam National University)
저널정보
한국토양비료학회 한국토양비료학회지 한국토양비료학회지 제54권 제1호
발행연도
2021.2
수록면
87 - 95 (9page)

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초록· 키워드

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The stable carbon (C) isotope ratio (δ<SUP>13</SUP>C) of dissolve inorganic carbon (DIC) in environmental samples including soil extracts and water samples provides insight into the biogeochemical C cycling. The δ<SUP>13</SUP>C of DIC can be measured in gas and solid (carbonate precipitates) states, and precipitates measurement of δ<SUP>13</SUP>C of DIC is more convenient compared to the gases measurement for analyzing a large number of samples. However, it is still uncertain what precipitation conditions, such as pH, headspace, and distilled water, are suitable. To address the question, we conducted a series of precipitation experiments, followed by δ<SUP>13</SUP>C, under different conditions of pH, headspace, and distilled water as well as precipitating agents (SrCl₂, BaCl₂, and CaCl₂). Our results demonstrated that DIC (depleted in <SUP>13</SUP>C) contaminant in double distilled water is the major error factor to decrease the δ<SUP>13</SUP>C. By combining the results from the experiments, we suggest that reliable δ<SUP>13</SUP>C data can be obtained by precipitation under the conditions of using DIC-free tertiary distilled water, samples with a high DIC concentration, CaCl₂ addition as a precipitating agent, pH 10.6, and the absence of a headspace produces a reliable δ<SUP>13</SUP>C measurement.

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ABSTRACT
Introduction
Materials and Methods
Results and Discussion
Conclusion
References

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