Flow injection systems with inductively-coupled argon plasma atomic emission spectrometry: Part 2. The generalized standard addition method - Zagatto, Elias Ayres Guidetti; Jacintho, Antonio Octavio; Krug, Francisco José; Reis, Boaventura Freire dos; Bruns, Roy E; Araujo, M C U (Analytica Chimica Acta, 1983)