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| Spectroscopie d'absorption atomique× | Coulométrie× | |
|---|---|---|
| Domaine | Chimie analytique | Chimie analytique |
| Famille | Process / pipeline | Process / pipeline |
| Année d'origine≠ | 1955 | 1945 |
| Auteur d'origine≠ | Alan Walsh | James Lingane |
| Type≠ | elemental analysis technique | electrochemical titration |
| Source fondatrice≠ | Walsh, A. (1955). The application of atomic absorption spectra to chemical analysis. Spectrochimica Acta, 7, 108–117. DOI ↗ | Lingane, J. J. (1974). Electroanalytical Chemistry (2nd ed.). Interscience Publishers. ISBN: 978-0486409023 |
| Alias≠ | AAS, flame AAS, graphite furnace AAS, GFAAS | coulometric titration, electrochemical coulometry, amperes titration |
| Apparentées | 5 | 5 |
| Résumé≠ | Atomic absorption spectroscopy is an analytical technique that measures the concentration of metal elements by detecting the absorption of light by ground-state metal atoms in the gaseous state. Invented by Alan Walsh in 1955, it rapidly became the standard method for trace metal analysis in environmental, clinical, agricultural, and industrial samples. Atomic absorption spectroscopy's sensitivity, selectivity, and simplicity make it indispensable for monitoring toxic metals, nutritional minerals, and elements in complex matrices. | Coulometry is an electrochemical analytical method that determines the concentration of an analyte by measuring the total electric charge (in coulombs) required to oxidize or reduce the analyte completely at an electrode. Developed by James J. Lingane in the 1940s, coulometry is highly accurate because it is based on fundamental constants (Faraday's law) and does not require external standards or calibration curves. This method is particularly valuable for trace analysis, water determination, and analysis of reactive species. |
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