Determination of Silver in Aluminum-Lithium Alloy by Inductively Coupled Plasma-Atomic Emission Spectrometry

In this paper, the Silver content in Al-Li alloy was determined by inductively coupled plasma-atomic emission spectrometry(ICP-AES). Moreover, the dissolution method of the Al-Li alloy and the instrument parameters were also investigated. The results show that,using pure water、analytical reagent HNO₃ and analytical reagent H₂SO₄, the Al-Li alloy could dissolved completely in 30min when the volume ratio of v_(H2O):v_(HNO3):v_(H2SO4)equaled to 1:1:0.3 and the temperature controlled ranged from 250~300℃. Ag 328.068nm was chosen as the analytical line to characterize the Ag content in the solutions. The optical instrument parameters were determined as following:1000W of frequency power, 0.75L/min of nebulizer gas flow and 10 mm of view distance. The matrix induced interference was eliminated by matrix matching method. The detection limits of the method was 1.4888g/g for Ag. The recovery of the method is 99.87%~100.57% for the Ag element with precision of 0.226% RSD (n=10).This method was accurate and simple with satisfactory precision and was suitable for routine quality control analysis.