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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2021.11
- 수록면
- 76 - 77 (2page)
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A method for simultaneous determination of stable nitrogen (N) isotope ratios (δ<SUP>15</SUP>N) of ammonium (NH₄<SUP>+</SUP>), nitrate (NO₃<SUP>-</SUP>), dissolved organic N (DON), and total dissolved N (TDN) was proposed using a conventional distillation method for NH₄<SUP>+</SUP> and NO₃<SUP>-</SUP>, a direct evaporation for TDN, and an isotope mass balance equation for δ<SUP>15</SUP>N-DON. A series of experiments were conducted 1) to find evaporation conditions including pH (< 3.5 vs. 5.4) and evaporation methods (oven drying at 60 ℃ and 100 ℃, infra-red chamber, and freeze-drying), 2) to investigate precision and accuracy of distillation for δ<SUP>15</SUP>N of NH₄<SUP>+</SUP> and NO₃<SUP>-</SUP>, and 3) to determine δ<SUP>15</SUP>N-TDN by direct evaporation and δ<SUP>15</SUP>N-DON with mass balance equation. (NH₄)₂SO₄ (‒4.0 ± 0.03‰,), KNO₃ (‒4.2 ± 0.03‰), and CO(NH₂)₂ (‒5.4 ± 0.04‰) were used as reference materials for NH₄<SUP>+</SUP>, NO₃<SUP>-</SUP>, and D ... 전체 초록 보기
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