SEMIAUTOMATED PROCEDURE FOR TOTAL NITROGEN IN PLANT AND SOIL SAMPLES
SEMIAUTOMATED PROCEDURE FOR TOTAL NITROGEN IN PLANT AND SOIL SAMPLES
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DOI：
10.2136/sssaj1976.03615995004000060026x
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发表时间：
1976-01-01
影响因子：
2.9
通讯作者：
BOSWELL, FC
中科院分区：
文献类型：
--
作者：
GALLAHER, RN;WELDON, CO;BOSWELL, FC
研究了测定植物和土壤样品中总氮的廉价替代方法。植物和土壤样品中的氮浓度变化很大，在126样品容量铝块消化器中消化，然后在半自动反应容器组件中的铵电极测定总氮。建议的铵电极半自动（AES）程序进行了比较，标准的微量凯氏定氮和铝块消解-蒸汽蒸馏-滴定（ABDDT）程序。更多的样品（30-50），每8小时一天可以分析与建议的半自动化程序相比，标准微量凯氏定氮法。两种方法的精密度相当，但使用ABDDT程序发现N显着增加。
Inexpensive alternatives for the determination of total N in plant and soil samples were investigated. Plant and soil samples which varied widely in N concentration were digested in a 126-sample-capacity Al block digester followed by determination of total N with the ammonium electrode in a semiautomated reaction vessel assembly. The proposed ammonium electrode semiautomated (AES) procedure was compared to standard micro-Kjeldahl and Al block digested-steam distilled-titrated (ABDDT) procedures. More samples (30-50) per 8 h day could be analyzed with the proposed semiautomated procedure as compared to standard micro-Kjeldahl methods. The precision of the methods were comparable but significantly more N was found by using the ABDDT procedure.