【摘要】 目的研究探讨一种适用于海产品、肉制品中氟含量测定的离子色谱检测方法。方法氟在酸性条件下,蒸馏分离,蒸出的氟化氢被淋洗液吸收,采用电导检测-离子色谱仪和Ionpac AS14色谱柱,3.5mmol/L碳酸钠-1.0mmol/L碳酸氢钠为淋洗液,流量为1.2ml/min,样品及标准系列在酸性条件下经水蒸气蒸馏-吸收,直接进样测定。结果该方法的线性范围为0.05～1.0mg/L,r值均大于0.9990(n=6),最低检出限为0.3mg/kg,相对标准偏差为1.00%～3.85%,样品回收率为88.1%～99.0%。结论该方法样品预处理效果好,氟离子峰分离好,有较高的回收率,精密度好,检出限较低。更多还原

【Abstract】 Objective To develop an ion chromatogram method for determination of fluoride in the sea food and meat. Methods Under the acid condition,fluorine could be separated by distillation,then fluorine is absorbed by washing liquid. The electricity lead detection-ion chromatogram with Ionpac AS14 column was employed to determine the content of fluoride,3.5 mmol/L of sodium carbonate-1.0 mmol/L of soda as the washing liquid at 1.2 ml/ min. Results The linear range was 0.05-1.0 mg/L,the relative coefficient (r) was more than 0.999 7 (n=6),the lowest detection limit was 0.3 mg/kg,the relative standard deviation was 1.00%-3.85%,the recovery rates were 88.1%-99.0%. Conclusion This method presents a good effect of pretreatment and fluorine ion seperation and with a satisfactory recovery rate,precision and detection limit.更多还原