吴燕燕, 刘法佳, 李来好, 杨贤庆, 周婉君, 邓建朝. 改良离子色谱法测定咸鱼中亚硝酸盐的研究[J]. 南方水产科学, 2011, 7(6): 1-6. DOI: 10.3969/j.issn.2095-0780.2011.06.001
引用本文: 吴燕燕, 刘法佳, 李来好, 杨贤庆, 周婉君, 邓建朝. 改良离子色谱法测定咸鱼中亚硝酸盐的研究[J]. 南方水产科学, 2011, 7(6): 1-6. DOI: 10.3969/j.issn.2095-0780.2011.06.001
shu
WU Yanyan, LIU Fajia, LI Laihao, YANG Xianqing, ZHOU Wanjun, DENG Jianchao. Determination of nitrite in salted fish by improved ion chromatography[J]. South China Fisheries Science, 2011, 7(6): 1-6. DOI: 10.3969/j.issn.2095-0780.2011.06.001
Citation: WU Yanyan, LIU Fajia, LI Laihao, YANG Xianqing, ZHOU Wanjun, DENG Jianchao. Determination of nitrite in salted fish by improved ion chromatography[J]. South China Fisheries Science, 2011, 7(6): 1-6. DOI: 10.3969/j.issn.2095-0780.2011.06.001
shu

改良离子色谱法测定咸鱼中亚硝酸盐的研究

Determination of nitrite in salted fish by improved ion chromatography

    摘要
  • 摘要: 文章优化了现有国家标准咸鱼中亚硝酸盐的离子色谱测定方法。咸鱼样品先经硝酸银（AgNO3）除去大部分氯离子（Cl-），IC-Ag预处理柱排除剩余Cl-的干扰，再用Ion Pac AS23（4 mm250 mm）分析柱和Ion Pac AG23（4 mm50 mm）保护柱，以4.5 mmolL-1碳酸钠（NaCO3）和0.8 mmolL-1碳酸氢钠（NaHCO3）的溶液为淋洗液，流速为1.0 mLmin-1，抑制型电导检测器检测。结果显示，用该改良方法测定不同品种咸鱼亚硝酸根离子（NO2-）的线性范围为0.01~2.00 mgL-1，相关系数为0.999 9，加标回收率为83.0%~101.6%，方法检出限为0.2 mgkg-1。该方法前处理简便、快速，能更加准确测定咸鱼制品的亚硝酸盐质量分数。

     

    Abstract: We determined the nitrite in salted fish by an improved ion chromatography method. The samples were first pretreated by AgNO3 solution to remove most of the Cl- and the rest of Cl- was excluded by using the Anpelclean TMIC-Ag column. Then the separation of nitrite was determined by suppressed conductivity detection on Ion Pac AS23 (4 mm250 mm) analytical column and Ion Pac AG23 (4 mm50 mm) guard column using 4.5 mmolL-1 NaCO3 and 0.8 mmolL-1 NaHCO3 as elution solvents at a flow rate of 1.0 mLmin-1. The linear range of this improved method is 0.01~2.00 mgL-1 with correlation coefficient (R) of 0.999 9; the detection limit is 0.2 mgkg-1 and the recovery is 83.0%~101.6%. The method with simple and fast pretreatment can determine nitrite in salted fish products more accurately.

     

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