Atomic Emission Spectrometry Determination Of Aluminum - Titanium - Boron Alloy Multi-element Method

Al-Ti-B alloy is the most widely used grain refinement agent in the world for the present. Each element in the alloy can affect its grain refinement effect directly, so the process of production must be strictly controlled. And because it's a new product, so the study of detection method for Al-Ti-B alloy that can satisfy the production control requirements analysis becomes imperative.In chapter 1, the background, contents and the purpose of this research work are introduced briefly. Some conceptual background and basic knowledge of AES, photoelectric direct reading spectrometry, ICP-AES and methods related to this research are summarized. Theoretical basis and analytical capability are also introduced. Moreover, both the advantages and disadvantages are summarized along with their applications.In chapter 2, the ICP-AES method of simultaneous determination of multi-elements in Al alloy has been built. The pre-treatment of sample, the analytical lines, and matrix effect of Al and its elimination were studied in detail. The optimal instrument conditions were determined by many experiments as following:1350W of frequency power,0.8 L·min-1 of nebulizer gas flow and 14.0mm of view distance. Precision and recovery of the method were tested, giving results of recovery in the range of 95%～110% with RSD (n=6) of 0.4%～3.0%. The method was accurate and simple with satisfactory precision and was suitable for routine control analysis.In chapter 3, the method of simultaneous determination of 4 elements in aluminium alloy by photoelectric direct reading spectrometry has been built. The course of sample selecting, making and testing were represented. Some analytical conditions, such as the temperature and humidity, the protection of Ag electrode, the preparation of sample were stated. The optimal instrument conditions were determined as following: 0.40MPa of Ar pressure,4s of flush time,14s of preburn time,6s of exposure time. The method was then used in practical test, the result showed that its precision was good, with the RSD (n=6) for the four elements under 3.7%. The result was also compared with that of ICP-AES, and in that way, we can conclude that the method used in this chapter is credible and can meet the demand of relevant national standards.