| 摘要: |
| 采用气相分子吸收光谱仪测定海水中亚硝酸盐氮，方法在低浓度（0.00~0.50mg/L）和高浓度(0.00~2.00mg/L)范围内均具有良好的线性，线性相关系数R2均≥0.9997，检出限为0.003mg/L，准确度和精密度良好。用本法与国标法（萘乙二胺分光光度法）同时测定若干实际海水样品中亚硝酸盐氮，两种方法的测定结果相对偏差为0.00%~4.90%。对两组测定结果进行线性拟合，结果显示相关系数R2为0.9987，说明两组测定结果具有良好的一致性。相比国标法，气相分子吸收光谱法具有操作简单、分析快速准确、干扰少等优点，能够替代国标法。 |
| 关键词: 气相分子吸收光谱法 海水 亚硝酸盐氮 |
| DOI： |
| 分类号:X832；O657.7+1 |
| 文献标识码:B |
| 基金项目: |
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| Determination of Nitrite Nitrogen in Seawater by Gas Phase Molecular Absorption Spectrometry |
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YE Minqiang， JI Xiangxing， LI Qiutong， CAO Lei
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Lianyungang Environmental Monitoring Center， Lianyungang， Jiangsu 222001， China
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| Abstract: |
| Nitrite nitrogen in seawater was determined by gas phase molecular absorption spectrometry. Good liner relationships were obtained in the mass concentration ranges of 0.00~0.50mg/L and 0.00~2.00mg/L respectively. And the correlation coefficient values R2 were both greater than 0.999 7. The method detection limit was 0.003mg/L. The result consistency was observed with relative deviation ranged from 0.00% to 4.90% in real sample determination using national standard method （N-（1-Naphthyl） ethylenediamine dihydrochloride spectrophotometric method） and the current method. Linear fit was adopted to analyze the correlation of the results determined by the two methods， and the result showed that the correlation coefficient value R2 was 0.998 7. Compared to national standard method， gas phase molecular absorption spectrometry method is simple， rapid and accurate， also it shows low interference， so， its an advanced method which can replace the national standard method. |
| Key words: Gas phase molecular absorption spectrometry Seawater Nnitrite nitrogen |
