Atomic-absorption spectroscopy as a tool for the determination of inorganic anions and organic compounds. A review

Abstract

GARCIA-VARGAS et aZ. : AAS FOR DETERMINATION OF ArtaZyst, VoZ. 108 1.1.3. Heteropolyacid compounds : determination of phosphate 1.1.3.1. Binary heteropolyacids 1.1.3.1.a. Single extraction 1.1.3.1 .b. Extractiondecomposition 1.1.3.1 .c. Precipitation of molybdophosphoric acid 1.1.3.2. Ternary heteropolyacids 1.1.4. Redox reactions 1.1.4.1. Inorganic anions : determinations of iodide, iodate, nitrate and chlorate 1.1.4.2. Organic compounds 1.2. Methods based on the formation of compounds in the atomisation cell 1.2.1. Suppression or enhancement of the atomic-absorption signal of a metal 1.2.1.1. Constant concentration of the metal added 1.2.1.1 .a. Alkali metals : determination of fluorine 1.2.1.1 .b. Alkaline earth metals : determinations of phosphate, sulphate, fluoride and organic compounds 1.2.1.1 .c. Transition metals : determinations of fluoride, sulphate and ammonia Variable concentration of the metal added 1.2.1 .%a. Atomic-absorption inhibition titration : determinations of sulphate and phosphate 1.2.1.2.b. Atomic-absorption inhibitionrelease titration : determination of fluoride Molecular-absorption spectrometry : determination of halogens 1.2.1.2. 1.2.2. 1.3. Methods based on the formation of volatile compounds: determination of halogens 2. Direct methods 2.1. Non-metallic elements 2.1.1, Flame methods 2.1.1.1. Atomic-absorption spectroscopy : determinations 2.1.1.2. Molecular-absorption spectroscopy : determinations 2.1.2. Electrothermal methods : determinations of phosphorus, of phosphorus, sulphur and iodine of phosphorus and sulphur sulphur and iodine 2.2. Organic compounds 3. Conclusions

Nutritional Composition and Antinutritional Factors of Five Wild Edible Fruits Grown in the Mekdela District, South of Wollo, Ethiopia

“…Using atomic absorption spectroscopy grade standards, standard stock solutions of Ca, K, Zn, and Fe were prepared. The minerals Ca, Zn, and Fe were determined using an acetylene flame at wavelengths of 422.7, 213.9, and 248.3 nm, respectively, using an atomic absorption spectroscopy method [ 19 ]. For every mineral, a different set of electrode lights was utilized.…”

Taking a deeper look into the roles of amines in atomic absorption spectrometry

“…176 Since then, diverse studies have focused on the indirect determination of different chemical species by AAS, 177–181 thus increasing the potential applicability of these techniques and supplying, in many cases, higher sensitivity in the AAS determination of alternative species. 182–184…”

“…176 Since then, diverse studies have focused on the indirect determination of different chemical species by AAS, [177][178][179][180][181] thus increasing the potential applicability of these techniques and supplying, in many cases, higher sensitivity in the AAS determination of alternative species. [182][183][184] Indirect AAS methods usually involve the formation of a metal complex, oen non-specic and very restricted in their applicability, despite their rapidity (chemical kinetics), sensitivity and accuracy. The potential approaches used for the indirect AAS measurements of organic and non-metal species include (i) precipitation of a salt, (ii) ion-association or chelate complex formation followed by solvent extraction, (iii) chemical interferences in the ame, (iv) chemical multiplication procedures, (v) redox methods, and (vi) "direct" measurement, limited to metalcontaining species.…”

Analytical potential of continuous precipitation in flow injection-atomic absorption configurations

“…To extend the scope of application of atomic absorption spectrometry (AAS) and to increase the sensitivity achievable for elements directly unsuitable for trace analysis, much attention has been devoted to the development of indirect methods for such elements (1)(2)(3). The application of these methods to the determination of nonmetal elements and organic compounds involves carrying out a suitable chemical reaction.…”