微波消解样品-火焰原子吸收光谱法测定焦炭灰中钾、钠含量  

FAAS Determination of K and Na in Coke Ash with Microwave Assisted Sample Digestion

作　　者：杨俊[1] 陈雪莲[1] 刘文欣[1] 赵振纲[1] 

机构地区：[1]河北出入境检验检疫局曹妃甸办事处,唐山063200

出　　处：《理化检验（化学分册）》2013年第5期529-530,534,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：出入境检验检疫行业标准项目(2009B663)

摘　　要：0.100 0g焦炭灰样品经氢氟酸-硝酸(1+3)溶液8mL消解,用火焰原子吸收光谱法测定其中钾和钠的含量。钾和钠的质量浓度分别在4mg.L-1及2mg.L-1以内与其吸光度呈线性关系,检出限(3σ)分别为12μg.L-1及6μg.L-1。方法用于分析焦炭灰标准物质,测定值与认定值相符,钾和钠的相对标准偏差(n=11)依次在2.7%～3.8%和1.3%～3.1%之间。Sample of coke ash （0. 100 0 g） was digested with 8 mL of mixed acid of HF and HNOa （1＋3）, and the contents of K and Na in the sample solution were determined by FAAS. Linear relationships between values of absorbance and mass concentration of K and Na were obtained in the ranges within 4 mg ·L^-1 and 2 mg ·L^-1, with detection limits （3er） of 12 μg·L^-1and 6 μg·L^-1, respectively. The proposed method was applied to the analysis of CRM＇s, giving results in consistency with the certified values. Values of RSD＇s （n= 11） found were in the ranges of 2.7 %-3.8 % for K and 1.3 %- 3. 1% for Na.

关 键 词：焦炭灰 微波消解 火焰原子吸收光谱法 钾 钠 

分 类 号：O657.31[理学—分析化学]