| pH值对凯氏蒸馏法氨氮检出量的影响分析研究 |
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| 引用本文： | 宫晓梅,孙嘉,王晓瑞,李沁国,张树栋,杨启霞.pH值对凯氏蒸馏法氨氮检出量的影响分析研究[J].环境科学与管理,2013(5):109-112. |
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| 作者姓名： | 宫晓梅 孙嘉 王晓瑞 李沁国 张树栋 杨启霞 |
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| 作者单位： | 烟台大学环境与材料工程学院,山东烟台264005 |
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| 基金项目： | 山东省自然科学基金（No.ZR2011EE007） |
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| 摘 要： | 土壤、肥料中的氨氮测定常用2mol·L^-1KC浸提一蒸馏法一酸滴定的方法进行测定，其中蒸馏是最关键和最重要的一个环节。以污泥堆肥样品为例，利用统计学原理，研究了汽提蒸馏过程中pH对氨氮检出量的影响。结果显示：pH值在6．5—11．0范围内与氨氮的检出系数是显著的正相关关系（相关系数r=0．9891）；回归方程在0．05的水平下是非常显著的，拟合度很好。进一步做残差和预测分析可以得出：pH值在6．5～10．0范围内，预测值和测定值的符合度更好。
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| 关 键 词： | 氨氮 pH 检出系数 统计分析 |
Influence of pH Value on Ammonia Nitrogen Detection Limit of Kjeldahl Distillation Method |
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| Gong Xiaomei,Sun Jia,Wang Xiaorui,Li Qinguo,Zhang Shudong,Yang Qixia.Influence of pH Value on Ammonia Nitrogen Detection Limit of Kjeldahl Distillation Method[J].Environmental Science and Management,2013(5):109-112. |
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| Authors: | Gong Xiaomei Sun Jia Wang Xiaorui Li Qinguo Zhang Shudong Yang Qixia |
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| Institution: | (College of Environmental and Material Engineering, Yantai University, Yantai 264005, China) |
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| Abstract: | Taking ammonia nitrogen determination with sludge composting sample as an example, this paper studies the effects of pH values on ammonia nitrogen determination using statistical principles. The result shows that there is a significantly positive correlation（ coefficient 0. 989 1 ） between the detection coefficient（ the rate of the assay value and objective value） when pH values ranged from 6. 5 to 11.0. The regression equation is significant below 0. 05. Further residual and predictive analysis shows that fitness rates between the predicted and measured values were favorable with pH values from 6. 5 to 10. 0. |
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| Keywords: | ammonia nitrogen pH value detection coefficient statistical analysis |
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