提出了电感耦合等离子体原子发射光谱法测定高温合金中硼含量的方法。高温合金称样0.500 0 g,用盐酸-硝酸(5+1)混合酸20 mL和氢氟酸1 mL溶解。硼的分析谱线为249.678 nm。硼的质量浓度在4.00 mg·L-1以内与其发射强度呈线性关系,方法的检出限(3S/N)为2.1 μg·L-1。方法用于分析5个高温合金标准样品和已知样品,测定值与认定值或已知值相符,测定值的相对标准偏差(n=6)在0.46~4.6%之间。

A method for the determination of boron in high temperature alloy by ICP-AES was proposed in this paper. 0.500 0 g of sample was dissolved with 20 mL of a mixed acid of HCl and HNO3 (5+1) and 1 mL of HF. The spectral line of 249.678 nm was selected as analytical line for the determination. Linear relationship between values of emission intensity and mass concentration of boron was kept in the range within 4.00 mg·L-1. Value of detection limit (3S/N) of the method found was 2.1 μg·L-1. The proposed method was used in the analysis of 5 standard or known samples of high temperature alloy, giving results in consistency with their certified values or known value. Values of RSD′s (n=6) found were in the ranges of 0.46%-4.6%.