标准加入-电感耦合等离子体原子发射光谱法测定K465高温合金中的铪

Determination of Hafnium in K465 Superalloy by Standard Addition Inductively Coupled Plasma Atomic Emission Spectrometry

K465高温合金作为一种广泛应用的航空结构材料,其中铪含量的准确测定对材料性能的研究具有重要意义。采用电感耦合等离子体原子发射光谱法(ICP-AES)测定K465高温合金中铪的含量,会受到基体元素和合金元素的干扰。试验采用盐酸、硝酸和柠檬酸处理样品,选择277.366 nm、273.876 nm和264.141 nm三个不同波长的分析谱线,并采用干扰较小、准确性高的标准加入法消除了基体元素和合金元素的干扰影响。试验结果表明,标准加入-ICP-AES发测定K465高温合金中的铪的最佳分析谱线波长为264.141 nm,方法检出限为0.002 mg·L^(-1),在此波长下验证方法的回收率为98.7%~104.0%,测量值的相对标准偏差为1.69%~3.20%。本方法准确可靠,能够满足K465高温合金分析的需要。

K465 superalloy is a widely used as a kind of aeronautical structural material,in which the accurate determination of hafnium content has great significance for the study of material properties.Determination of hafnium content in K465 superalloy by inductively coupled plasma atomic emission spectrometry(ICP-AES)is affected by matrix and alloy elements.The test were treated with hydrochloric acid,nitric acid and citric acid,and the spectral lines of 277.366 nm,273.876 nm and 264.141 nm were selected.The test selected the standard addition method with low interference and high accuracy to eliminate the interference effect of matrix and alloy elements.The experimental results show that the optimal analytical wavelength for the determination of hafnium in K465 superalloy by standard addition-inductively coupled plasma atomic emission spectrometry is 264.141 nm,the detection limit of the method is 0.002 mg·L^(-1),and the recovery of the verification method at this wavelength is 98.7%~104.0%.The relative standard deviation of the measured values is 1.69%~3.20%.This method is accurate and reliable,and can meet the analysis needs of K465 superalloy.