Compara mètodes

	Mètode d'addició estàndard	Espectroscòpia d'absorció atòmica
Camp	Química analítica	Química analítica
Família	Process / pipeline	Process / pipeline
Any d'origen	1920s	1955
Autor original	Analytical chemistry practice	Alan Walsh
Tipus	matrix-compensating calibration technique	elemental analysis technique
Font seminal	Harris, D. C. (2010). Quantitative Chemical Analysis (8th ed.). Freeman. ISBN: 978-1429218153	Walsh, A. (1955). The application of atomic absorption spectra to chemical analysis. Spectrochimica Acta, 7, 108–117.
Àlies	spiking method, known-addition method, matrix matching	AAS, flame AAS, graphite furnace AAS, GFAAS
Relacionats	5	5
Resum	The standard addition method is a quantitative analytical technique that determines the concentration of an unknown analyte by measuring the response before and after adding a known quantity of the analyte (a standard) to the sample itself. This approach compensates for matrix effects and interference from other sample components, making it invaluable when analyzing complex matrices (biological fluids, environmental samples, geological materials) where the sample composition profoundly affects the measured signal. The standard addition method is widely recognized in analytical chemistry as a primary quantification strategy when external calibration is compromised by matrix variability.	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.