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| 碱性过硫酸钾氧化-气相分子吸收光谱法测定水中总氮 |
| TotalNitrogen Determ ination inW ater by GasM olecular Absorption Spectrometry with Alkaline Potassium Persulfate Oxidation |
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| DOI： |
| 中文关键词: 总氮 碱性过硫酸钾 气相分子吸收光谱法 水质 |
| 英文关键词: Total nitrogen Alkaline potassium persulfate Gas molecular absorption spectrometry W aterquality |
| 基金项目: |
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| 中文摘要: |
| 采用碱性过硫酸钾氧化-气相分子吸收光谱法测定水中总氮, 用螺纹盖聚四氟乙烯消化管代替比色管, 称重法校正体积, 加大NaOH用量, 讨论了干扰及消除办法。方法在0 g~ 20. 0g 范围内线性良好, 检出限为0. 016 m g/L, 标准溶液平行测定的RSD≤1.5%, 实际水样加标回收率为99.2% ~ 102%, 测量结果的扩展不确定度为 3.3% 。 |
| 英文摘要: |
| Totalnitrogen in waterwasdeterminedbygas molecularabsorptionspectrom etry with potassium persulfateoxidation. The detection usedpolyfluortetraethylene digestivetubeswithwhorlcapinstead ofcolorimetertubes, volum ecalibration byweighingmethod andincreasedN aOH dosage. Theinterferenceanditseliminate measurementwere discussed. A good linearity wasin range from 0 g to 20.0 g. The detection limitwas 0.016 mg/L. RSD of parallelstandard solution was≤1. 5%. Spiked recoveries ofsamples were between 99.2% and 102%. Expanded uncertaintyoftestresultswas3.3%. |
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