【引用本文】 吴昊, 朱红霞, 袁懋, 等. 气相分子吸收光谱法测定土壤中铵态氮和硝态氮的含量[J]. 岩矿测试, 2021, 40(1): 165-171. doi: 10.15898/j.cnki.11-2131/td.202003100029
WU Hao , ZHU Hong-xia , YUAN Mao , et al. Determination of Ammonium Nitrogen and Nitrate Nitrogen in Soil by Gas Phase Molecular Absorption Spectrometry[J]. Rock and Mineral Analysis, 2021, 40(1): 165-171. doi: 10.15898/j.cnki.11-2131/td.202003100029

气相分子吸收光谱法测定土壤中铵态氮和硝态氮的含量

1. 湖北省生态环境监测中心站, 湖北 武汉 430074;

2. 中国环境监测总站, 北京 100012

收稿日期: 2020-03-10  修回日期: 2020-04-16 

基金项目: 中国工程院咨询研究项目“土壤污染风险识别及应对策略咨询研究”(2020-XY-21)

作者简介: 吴昊,硕士,工程师,主要研究环境监测分析。E-mail:979648817@qq.com。。

Determination of Ammonium Nitrogen and Nitrate Nitrogen in Soil by Gas Phase Molecular Absorption Spectrometry

1. Environmental Monitoring Center of Hubei Province, Wuhan 430074, China;

2. China National Environmental Monitoring Centre, Beijing 100012, China

Received Date: 2020-03-10
Revised Date: 2020-04-16

摘要:通过测定土壤中铵态氮和硝态氮的含量,能够为农业领域土壤精准施肥和土壤的环境保护提供重要参考。目前基于分光光度法的土壤中铵态氮和硝态氮的分析方法容易受到提取试液颜色、浑浊度、其他共存离子等干扰不能直接测定,必须进行脱色等前处理操作,费时耗力。因此,本文建立了一次性同时浸提,不经脱色处理,采用气相分子吸收光谱法测定农田土壤中铵态氮和硝态氮含量的方法。利用该方法测定农田土壤中铵态氮和硝态氮,避免了繁琐的显色反应过程,一个批次样品(50个)的分析流程仅需5h。在0.10~2.00mg/L(铵态氮)和0.20~4.00mg/L(硝态氮)浓度范围内,工作曲线线性良好;方法检出限分别为0.013mg/kg及0.002mg/kg;相对标准偏差(RSD)<1%;加标回收率为96.3%~100.7%。较之基于传统分光光度法的国家标准方法,本方法在检出限、精密度和回收率等指标方面均有显著改善,能够满足农田土壤中铵态氮和硝态氮的批量精准分析需求。

关键词: 土壤, 铵态氮, 硝态氮, 气相分子吸收光谱法, 同时浸提

Determination of Ammonium Nitrogen and Nitrate Nitrogen in Soil by Gas Phase Molecular Absorption Spectrometry

KEY WORDS: gas phase molecular absorption spectrometry, soil, ammonium nitrogen, nitrate nitrogen, simultaneous extraction

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气相分子吸收光谱法测定土壤中铵态氮和硝态氮的含量

吴昊, 朱红霞, 袁懋, 许人骥, 薛荔栋