in analysis: refers to the analytical sample, considered as an assemblage of constituents, with all their individual properties. The combined effect that the various constituents of the matrix may exert on the measure of the analysis of the element is referredto as the matrix effect.

The term "matrix" was found in the following pages:

A hard nut cracked: Brazil nuts’ selenium compounds identified | EVISA's News
Books on Elemental Speciation | EVISA's News
New mass spectrometric method allows fast and comprehensive analyses of metabolites | EVISA's News
Instrument database: elementar Analysensysteme GmbH - vario MICRO Element Analyzer
ERM-CE101: A new CRM for assessing environmental quality through fish | EVISA's News
Instrument database: Analytik Jena GmbH - solid AA® – direct solids analysis for all graphite furnace AAS systems from Analytik Jena
Instrument database: Buck Scientific - 411 Arsenic Hydride Analyzer
Instrument database: Aurora Instruments Ltd. - AI 2200 AA/Plasma Emission Spectrometer
EVISA Workshop on: Mercury speciation analysis - The basis for sound risk assessment, and optimized remediation strategies for contaminated soils, sediments and sludge | EVISA's Agenda of Events
Instrument database: Analytik Jena AG - novAA® 400 P - fully automated AAS spectrometer
Instrument database: Agilent Technologies Inc. - 7700x ICP-MS
Instrument database: Dionex Corporation - ICS-1100 Basic Integrated IC System
Material database: National Institute for Environmental Studies (NIES) - CRM 23: Tea Leaves II
Instrument database: Aurora Biomed - Crysta 500 Water Purification System
Instrument database: Analytik Jena GmbH - multi EA® 5000
Instrument database: VG Elemental - VG 354 TIMS
Instrument database: HORIBA Jobin Yvon - ACTIVA-M CCD ICP Spectrometer
Material database: National Institute of Standards and Technology (NIST) - SRM 614/615 - Trace Elements in Glass
Material database: Sigma-Aldrich - Matrix CRM - Soil, Sludge, Sediment: Trace Metals - Sandy Loam 9
Instrument database: Elemental Scientific Inc. (ESI) - seaFAST - Automated ICPMS Preconcentration System for Undiluted Seawater