摘要
提出了电感耦合等离子体原子发射光谱法测定铸造铝合金中磷含量的方法。铸造铝合金称样0.500 0g,用硝酸(1+1)溶液12mL和氢氟酸4mL溶解。选择波长为213.618nm谱线作为测定磷的分析线。磷的质量浓度在4.00mg·L-1以内与其发射强度呈线性关系,方法的检出限(3s/k)为0.020mg·L-1。方法用于分析5个铸造铝合金标准物质,测定值与认定值相符,相对标准偏差(n=6)在0.43%～2.2%之间,回收率在94.0%～109%之间。
A new method for the determination of phosphorus in casting aluminum alloy by ICP-AES was proposed in this paper.0.500 0 g of the sample was dissolved completely with 12 mL of HNO3（1＋1）solution and 4 mL of HF.The spectral line of 213.618 nm was selected as analytical line for the determination.Linear relationship between values of emission intensity and mass concentration of phosphorus was kept in the range within 4.00 mg·L-1.Value of detection limit（3s/k） of the method found was 0.020 mg·L-1.The proposed method was used in the analysis of 5 standard materials of casting aluminum alloy,giving results in consistency with their certified values.Values of RSD′s（n=6） and recovery found were in the ranges of 0.43%-2.2% and 94.0%-109% respectively.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2013年第6期677-678,682,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
