碱性过硫酸钾氧化法测定溶液中全氮含量氧化剂的选择

被引:48
作者
周建斌
李生秀
机构
[1] 西北农业大学资源与环境科学系!杨陵
[2] 不详
关键词
全氮测定; 碱性过硫酸钾法; 氧化剂;
D O I
暂无
中图分类号
S153 [土壤化学、土壤物理化学];
学科分类号
摘要
对碱性过硫酸钾氧化法测定溶液中全氮含量采用的氧化剂进行了比较研究。结果表明,氧化反应过程中溶液的pH值与氧化剂的效果有密切关系;氧化剂中过硫酸钾与NaOH配比合适,有利于溶液中的氮素转化为NO-3-N。3%过硫酸钾与0.15mol.L-1NaOH配合是一个适宜的氧化剂,可测定的尿素最大浓度为N,80mg·L-1,可定量地回收L-丙氨酸及EDTA溶液所含的氮素,测定的0.5mol.L-1K2SO4土壤浸提液中的全氮与开氏法结果基本一致。
引用
收藏
页码:299 / 304
页数:6
相关论文
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