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| 纳氏试剂比色法测定土壤铵态氮的研究 | |
| 引用本文： | 弓晓峰,张静,张振辉,周云.纳氏试剂比色法测定土壤铵态氮的研究[J].环境科学与技术,2006,29(1):43-44. |
| 作者姓名： | 弓晓峰 张静 张振辉 周云 |
| 作者单位： | 1. 南昌大学教育部鄱阳湖湖泊生态与生物资源利用实验室;南昌大学环境科学与工程学院 2. 南昌大学环境科学与工程学院 3. 南昌大学化学系,南昌,330029 |
| 基金项目： | 重庆市应用基础研究基金 , 江西省教育厅科研项目 |
| 摘 要： | 进行了用纳氏试剂比色法测定土壤中铵态氮的实验。试验表明,入射光波长在390±10nm范围内,方法的灵敏度较高;用酒石酸钾钠-氢氧化钠溶液作为掩蔽剂,可排除土壤中钙、镁等金属离子对测定的干扰。并且对氢氧化钠用量、显色剂用量进行试验,以用20%氢氧化钠溶液1.5mL,纳氏试剂0.5mL为适宜测定条件。方法检出限为0.049mg/L,定量下限为0.098mg/L。 |
| 关 键 词： | 生纳氏试剂 土壤 铵态氮 波长 氢氧化钠 |
| 文章编号： | 1003-6504(2006)01-0043-02 |
| 收稿时间： | 2004-11-01 |
| 修稿时间： | 2004年11月1日 |
Measurement of NH3-N in Soil with Nessler's Reagent Colorimetry |
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| GONG Xiao-feng,ZHANG Jing,ZHANG Zhen-hui,ZHOU Yun.Measurement of NH3-N in Soil with Nessler''''s Reagent Colorimetry[J].Environmental Science and Technology,2006,29(1):43-44. | |
| Authors: | GONG Xiao-feng ZHANG Jing ZHANG Zhen-hui ZHOU Yun |
| Abstract: | Experiment was done to detect NH3-N in soil by Nessler's reagent colorimetry. Results showed delicacy of the method was improved when wavelength of the incidence was between 390mn and 410nm. Sodium potassium tartrate - NaOH solution was used as masking agent to reject the disturbance of Ca2+ and Mg2+. The dosage of NaOH solution and Nessler's reagent was tested. Results indicated that the appropriate dosage of NaOH solution was 1.5ml and Nessler's reagent was 0.5ml. The detection limit was 0.049mg/L and quantitative lower limit was 0.098mg/L. |
| Keywords: | Nessler's reagent soil NH3-N wavelength NaOH |
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