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.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
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)
