| AA3型连续流动分析仪测定土壤和植物全氮的方法研究 |
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| 引用本文： | 张英利,许安民,尚浩博. AA3型连续流动分析仪测定土壤和植物全氮的方法研究[J]. 西北农林科技大学学报(自然科学版), 2006, 34(10): 128-132 |
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| 作者姓名： | 张英利 许安民 尚浩博 |
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| 作者单位： | 西北农林科技大学,资源环境学院,陕西,杨凌,712100 |
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| 摘 要： | 研究了用AA 3型连续流动分析仪测定土壤和植物全氮的方法。结果表明,根据待测溶液中硫酸浓度调节缓冲溶液中N aOH的量,保持反应pH在适宜范围,利用连续流动分析仪能够准确地测定土壤和植物中的全氮含量,与蒸馏滴定法的测定结果相比无显著差异,标准曲线相关系数达0.999以上,平均回收率为97.8%~102.3%,土壤和植物待测液中NH+4-N含量的检出限分别为0.033 7和0.016 5 m g/L。
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| 关 键 词： | 连续流动分析仪(CFA) 植物全氮 土壤全氮 测定方法 |
| 文章编号： | 1671-9387(2006)10-0128-05 |
| 收稿时间： | 2006-02-16 |
| 修稿时间： | 2006-02-16 |
Determination study of total nitrogen in soil and plant by continuous flow analytical system |
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| ZHANG Ying-li,XU An-min,SHANG Hao-bo,MA Ai-shang. Determination study of total nitrogen in soil and plant by continuous flow analytical system[J]. Journal of Northwest A&F University（Natural Science Edition）, 2006, 34(10): 128-132 |
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| Authors: | ZHANG Ying-li XU An-min SHANG Hao-bo MA Ai-shang |
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| Affiliation: | ZHANG Ying-li,XU An-min,SHANG Hao-bo,MA Ai-shang(College of Resources and Environmental Sciences,Northwest A & F University,Yangling,Shaanxi 712100,China) |
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| Abstract: | Determination method of total nitrogen in soil and plant by AA3 Continuous Flow Analytical System was investigated. The results show that ,the amount of sodium hydroxide in buffer solution can be adjusted according to the sulfuric acid concentration in the sample solution ,and the reaction would occur in an adequate pH range. AA3 CFA can be used to assay total nitrogen in soil and plant accurately. The correlation efficiency for the standard series is as high as over 0. 999,and the average recovery percentage is 97.8%-102.3%. The N detection limit of analytical solution of soil and plant are 0. 033 7 and 0. 016 5 mg/L respectively. |
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| Keywords: | Continuous Flow Analytical System(CFA) total nitrogen in plant total nitrogen in soil determination method |
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