电感耦合等离子体原子发射光谱法测定微氮合金中锰磷铬铝等元素含量

Determination of Manganese,Phosphorus,Chromium,Aluminum,and Other Elements in MicroNitrogen Alloys by Inductively Coupled Plasma Atomic Emission Spectroscopy

微氮合金主要包括锰、磷、铬、铝等元素,其元素含量暂无国家标准检测方法。若参照类似物料进行成分检测,需要用到过氧化还原滴定法、光度法等多种方法,且各种成分测定需单独溶解样品后单独检测,而采用多种方法单独检测耗时费力,难以满足快检要求。采用ICP光谱方法联合测定微氮合金中的锰、磷、铬、铝等元素含量,通过分析样品影响因素,确定了最佳的测定溶剂和检测条件。结果表明,采用氢氟酸加高氯酸能够将试样完全溶解,排除基体与共存元素干扰,高效测定元素谱线及含量,相对标准偏差仅为0.70%—3.98%。

Micro-nitrogen alloy mainly includes manganese,phosphorus,chromium,aluminum,and other elements.There is no national standard detection method for its element content.If referring to similar materials for testing,multiple methods such as peroxidation-reduction titration and photometry need to be used,and the determination of each component requires separate sample dissolution preparation and separate detection.It is time-consuming and laborious to use various methods to detect the samples separately,and it is challenging to meet the requirements for rapid inspection.This article uses the ICP spectroscopy method to jointly determine the content of manganese,phosphorus,chromium,aluminum,and other elements in micro-nitrogen alloys.The optimum solvent and detection conditions are determined by analyzing the influencing factors.The results show that the sample can be completely dissolved by hydrofluoric acid and perchloric acid,and the interference of matrix and coexisting elements can be eliminated.The spectral element lines and contents can be efficiently measured,with a relative standard deviation of only 0.70%to 3.98%.