| 半微量凯氏法测定植株中全氮及测量不确定度评定 |
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| 引用本文： | 刘丽敏,顾重武,曾燕燕. 半微量凯氏法测定植株中全氮及测量不确定度评定[J]. 安徽农业科学, 2017, 45(34): 7-9,46. DOI: 10.3969/j.issn.0517-6611.2017.34.003 |
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| 作者姓名： | 刘丽敏 顾重武 曾燕燕 |
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| 作者单位： | 浙江省河海测绘院,浙江杭州,310010;浙江省河海测绘院,浙江杭州,310010;浙江省河海测绘院,浙江杭州,310010 |
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| 摘 要： | [目的]测定植株中全氮并对测量不确定度进行评定。[方法]以浓H_2SO_4和H_2O_2为消煮液,采用优化后的升温程序,用半微量凯氏法测定植株中全氮。[结果]通过对植株样品和标准植株样的测定及不确定度评定可知,测定数据可靠,结果准确合理。[结论]测定过程中的不确定度主要来源于盐酸标准溶液和试样测定重复性,为实验室准确快速测定植株中全氮提供参考。
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| 关 键 词： | 半微量凯氏法 全氮 不确定度评定 植株 |
Determination of Total Nitrogen in Plant Samples by Semimicro-Kjeldahl Method and Uncertainty Evaluation of Measurement Results |
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| Abstract: | [Objective] Total nitrogen in plant was measured by semimicro-kjeldahl method and the uncertainty of measurement results was evaluated.[Method] Total nitrogen was measured with concentrated sulfuric acid and hydrogen peroxide as boiling liquid at the optimized heating program.[Result]The uncertainty of measurement of plant samples and standard plant samples showed that the data was reasonable and the results were accurate and reliable.[Conclusion] Main sources of the total uncertainty came from the hydrochloric acid standard solution,titration process and repetitive titration.It could be reference for laboratory accurate and rapid determination of total nitrogen in plant. |
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| Keywords: | Semimicro-Kejeldahl method Total nitrogen Uncertainty evaluation Plant |
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