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| 连续流动分析-分光光度法测定水和废水中总氮 |
| Determination of Total Nitrogen in Water and Wastewater by Continuous Flow Analysis and Spectrophotometric Method |
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| DOI： |
| 中文关键词: 总氮 连续流动分析 分光光度法 水 废水 |
| 英文关键词: Total nitrogen Continuous flow analysis(CFA) Spectrophotometry Water Wastewater |
| 基金项目:国家环境保护标准制修订基金资助项目(960) |
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| 中文摘要: |
| 对连续流动分析-分光光度法测定水和废水中总氮进行方法适用性验证，6家验证单位验证数据表明：方法在0 mg/L～10.0 mg/L范围内线性良好，相关系数为0.999 6～0.999 9；方法检出限为0.04 mg/L，测定下限为0.16 mg/L；6家实验室测定总氮标准溶液RSD为0.4%～9.6%，测定总氮有证标准物质的结果在允许范围内，实际水样的加标回收率为92.0%～111%。该方法与国标方法同时测定多种类型的水样，结果无显著差异。探讨了影响该方法测定的干扰因素和消除方法，并提出方法应用要点。 |
| 英文摘要: |
| Applicability of continuous flow analysis and spectrophotometric method to measure total nitrogen in water and waste water was studied.Calibration results of 6 laboratories showed good linear regression in concentration range between 0 mg/L and 10.0 mg/L with correlation coefficient varied from 0.999 6 to 0.999 9.The method detection limit was 0.04 mg/L and the quantitation limit was 0.16 mg/L.The test results of certified reference material was in the permission range,RSD ranged from 0.4% to 9.6%.The recovery rate of real water samples was between 92.0%～111%。Therefore the aforesaid method shows no significant difference compared with national standard method.The interference factor and elimination method was discussed. |
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