微波消解-FAAS测定薯片中钠的不确定度评定  

Uncertainty Evaluation for Determination of Sodium in Potato Chips by Flame Atomic Absorption Spectroscopy with Microwave Digestion

作　　者：李强[1] 钟宇强 舒永红 叶锡恩 钟加成 霍柱健 蔡美霞 苏柏琦 LI Qiang;ZHONG Yu-qiang;SHU Yong-hong;YE Xi-en;ZHONG Jia-cheng;HUO Zhu-jian;CAI Mei-xia;SU Bo-qi(Guangdong Provincial Key Laboratory of Emergency Test for Dangerous Chemicals,Guangdong Institute of Analysis,China National Analytical Center Guangzhou,Guangdong Academy of Sciences,Guangdong Guangzhou 510070,China)

机构地区：[1]广东省科学院,广东省测试分析研究所,中国广州分析测试中心,广东省化学危害应急检测技术重点实验室,广东广州510070

出　　处：《广州化工》2021年第3期84-87,共4页GuangZhou Chemical Industry

摘　　要：建立火焰原子吸收光谱法测定薯片中钠含量的不确定度评定方法。分析测定过程中的不确定度来源,对不确定度的组成进行了评定和量化。根据数学模型计算了样品中钠的含量,得到合成标准不确定度和扩展不确定度。火焰原子吸收光谱法测定薯片中钠的含量为7.32 mg/g,扩展不确定度为0.44 mg/g(k=2)。结果表明,不确定度的主要来源是重复测量和样品加标回收试验,其次是样品溶液中钠浓度的测定,其他因素引起的不确定度可以忽略。The method was established to evaluate the uncertainty of flame atomic absorption spectroscopy(FAAS) in the determination of sodium content in potato chips. The sources of uncertainty in the process of measurement were analyzed, and the components of uncertainty were evaluated and quantified. The synthetic standard uncertainty and extended uncertainty were calculated according to the mathematical model. The content of sodium in the sample was 7.32 mg/g by FAAS. The expanded uncertainty was 0.44 mg/g(k=2). The repeated determination and standard recovery of the sample were the main source of uncertainty, followed by the determination of sodium concentration in the sample solution, and the uncertainty caused by other factors can be ignored.

关 键 词：火焰原子吸收光谱法 薯片 钠 不确定度 

分 类 号：TS207.3[轻工技术与工程—食品科学]