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Position: Home > Articles > Determination of nitrite in salted fish by improved ion chromatography South China Fisheries Science 2011,07 (6) 1-6

改良离子色谱法测定咸鱼中亚硝酸盐的研究

作  者:
吴燕燕;刘法佳;李来好;杨贤庆;周婉君;邓建朝
单  位:
农业部水产品加工重点实验室
关键词:
咸鱼;亚硝酸盐;离子色谱法;改良
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 mm×250 mm)分析柱和IonPac AG23(4 mm×50 mm)保护柱,以4.5 mmol.L-1碳酸钠(NaCO3)和0.8 mmol.L-1碳酸氢钠(NaHCO3)的溶液为淋洗液,流速为1.0 mL.min-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 mg.L-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 mg.kg-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。
译  名:
Determination of nitrite in salted fish by improved ion chromatography
作  者:
WU Yanyan1,LIU Fajia1,2,LI Laihao1,YANG Xianqing1,ZHOU Wanjun1,DENG Jianchao1(1.Key Lab.of Aquatic Product Processing,Ministry of Agriculture,South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Guangzhou 510300,China;2.Guangdong Ocean University,Zhanjiang 524088,China)
关键词:
salted fish;nitrite;ion chromatography;improvement
摘  要:
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 mm×250 mm) analytical column and Ion Pac AG23(4 mm×50 mm) guard column using 4.5 mmol · L-1 NaCO3 and 0.8 mmol · L-1 NaHCO3 as elution solvents at a flow rate of 1.0 mL · min-1.The linear range of this improved method is 0.01~2.00 mg · L-1 with correlation coefficient(R) of 0.999 9;the detection limit is 0.2 mg · kg-1and 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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