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zai quan dan he dan -15 fen xi de zheng liu dan yuan zhong jin xing jiao cha wu ran de bi jiao
Author(s): 
Pages: 42-47
Year: Issue:  3
Journal: he nong xue tong bao

Keyword:  再蒸馏蒸馏器交叉污染标准样品天然丰度净化工艺馏出物玻璃成分玻璃表面回收率;
Abstract: <正> 在多数15N 示踪研究中,用凯氏法或其修改法将标记氮转化为 NH4+-N(即铵态 N),通过碱蒸气蒸馏,释放出氨,然后收集分析。连续蒸馏样品之间的交叉污染可引起15N 分析的重大误差。Martin 和 Ross(1968)报道,如果每组合蒸馏4分钟,
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