火焰原子发射光谱法测定食品中钾和钠含量的方法改进  

Improvement of determination for the content of potassium and sodium in food by Flame Atomic Emission Spectrometry

作　　者：林凯[1] 刘桂华[1] 张慧敏[1] 张红宇[1] 许欣欣[1] 姜杰[1] 

机构地区：[1]广东深圳市疾病预防控制中心,广东深圳518055

出　　处：《应用预防医学》2015年第6期391-395,399,共6页Applied Preventive Medicine

基　　金：国家卫计委食品安全标准修订项目ZHENGHE-2014-388;深圳市卫生计生系统科研项目(201402073)

摘　　要：] 目的对火焰原子发射光谱法测定食品中钾和钠含量的方法进行改进和探讨.方法采用高压密闭消解样品后,用火焰原子发射光谱法测定其中钾和钠的含量,并与原子吸收光谱法进行对比.结果在优化实验条件下,钾和钠的发射光谱法线性范围为0.1～4.0 mg/L,标准曲线线性关系良好,钾、钠的检出限分别为0.2 mg/100g 和0.8mg/100g;各种食品基质标准物质的测定值均在证书参考值范围内,RSD〈4%,原子发射光谱法与原子吸收光谱法的测定结果无差异.结论该方法准确、简便快速,精密度高,适用于食品中钾和钠含量的测定。Objective To improve and discuss the flame atomic emission spectrometry method to determine the content of Potassium(K) and Sodium(Na) in food.Method The samples were digested in airtight pressure closed vessel,then were analyzed by flame atomic emission spectrometry.The results obtained by this method were compared with flame atomic absorption spectrometry meanwhile. Results Under the optimized condition, the determine range of K and Na was 0.1~4.0 mg/L,the calibration curve showed good,and the detection limit were 0.2mg/100g and 0.8mg/100g respectively.The determination value of various food matrix material were within the range of certificate value,RSD<4% ,no difference between two methods’ results were found.Conclusion This method is accurate ,simple and rapid, and has high precision,suitable for determinating the content of K and Na in food.

关 键 词：]钾 钠 火焰原子发射光谱法 

分 类 号：R151.3[医药卫生—营养与食品卫生学]