气相分子吸收光谱法测定海水中亚硝酸盐氮
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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(0.00~0.50 mg/L)和高浓度(0.00~2.00 mg/L)范围内均具有良好的线性,线性相关系数R2均≥0.999 7,检出限为0.003 mg/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0.998 7,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。
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. 50 mg/L and 0. 00 ~ 2. 00 mg/L respectively. And the correlation coefficient values R2 were both greater than 0. 999 7. The method detection limit was 0. 003 mg/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,it's an advanced method which can replace the national standard method.
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. 50 mg/L and 0. 00 ~ 2. 00 mg/L respectively. And the correlation coefficient values R2 were both greater than 0. 999 7. The method detection limit was 0. 003 mg/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,it's an advanced method which can replace the national standard method.
引文
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[4]邵宏宏,周向阳,王琦,等.离子色谱法同时测定海产品中的硝酸盐、亚硝酸盐和多聚磷酸盐[J].食品科学,2014,35(20):248-252.
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[10]张敏.环境水体中硝酸盐和亚硝酸盐的检测新方法和相应分析仪器的研究及应用[D].厦门:厦门大学,2011.
[11]王婷,郭晋君.分析化学中检出限的分类及计算方法[J].广东化工,2013,40(17):189-189.
[12]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.海洋监测规范第2部分:数据处理与分析质量控制:GB 17378.2—2007[S].北京:中国标准出版社,2007.
[2]朱敬萍,梅光明,胡红美,等.流动注射法与分光光度法测定海水中亚硝酸盐的含量[J].浙江海洋学院学报(自然科学版),2015,34(1):51-54.
[3]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.海洋监测规范第4部分:海水分析:GB17378.4—2007[S].北京:中国标准出版社,2007.
[4]邵宏宏,周向阳,王琦,等.离子色谱法同时测定海产品中的硝酸盐、亚硝酸盐和多聚磷酸盐[J].食品科学,2014,35(20):248-252.
[5]许在彬.极谱法测定生活饮用水中的亚硝酸盐氮研究[J].安徽预防医学杂志,2005,11(4):239,241.
[6]袁亚莉,邓健,许金生.溴酸钾-亚甲蓝催化光度法测定硝酸盐和亚硝酸盐[J].光谱学与光谱分析,2002,22(5):806-808.
[7]赵玉昌.萘二胺荧光法测定水中微量亚硝酸盐[J].中国公共卫生,1995,11(4):155-155.
[8]臧平安.气相分子吸收光谱法测定亚硝酸根的研究[J].分析化学,1991,19(12):1363-1366.
[9]臧平安.气相分子吸收光谱法测定水中亚硝酸盐氮[J].中国环境监测,1995(3):4-6.
[10]张敏.环境水体中硝酸盐和亚硝酸盐的检测新方法和相应分析仪器的研究及应用[D].厦门:厦门大学,2011.
[11]王婷,郭晋君.分析化学中检出限的分类及计算方法[J].广东化工,2013,40(17):189-189.
[12]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.海洋监测规范第2部分:数据处理与分析质量控制:GB 17378.2—2007[S].北京:中国标准出版社,2007.