摘要
在弱酸介质中,硼、苯羟乙酸和[Fe(Phen)3]2+(phen:邻二氮菲)缔合生成具有较大疏水基团的化合物,用1,2-二氯乙烷萃取,再用去离子水反萃取,再用火焰原子吸收光谱法测定水相中铁,由此间接测定硼的含量。硼的质量浓度在0.05～3.24mg.L-1范围内呈线性,方法检出限(3S/N)为0.036mg.L-1。应用此方法测定了硼钢标准样品中硼含量,测得结果与已知值相符。
A method for indirect determination of boron in steel was studied and reported in this paper. In a weakly acidic medium, boron was reacted with phenylhydroxyacetic acid and [Fe（phen3 ]^2＋ to form a stable hydrophobic compound which was extracted with dichloromethane. Boron was determined indirectly by flame atomic absorption spectrometry via iron determination. Linear relationship between absorbance and boron concentration ranged in 0. 05-3. 24 mg · L^-1 was obtained. Detection limit of the method was 0. 036 mg · L^-1. The proposed method was applied to the determination of boron in steel with results in consistency with the known values.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2008年第12期1204-1205,1212,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
广西大学科研基金资助项目(X051108)
