In trace analysis, this is the unintentional introduction of analyte(s) or other species which are not present in the original sample and which may cause an error in the determination. It can occur at any stage in the analysis. Quality assurance procedures, such as analyses of blanks or of reference
materials, are used to check for contamination problems.

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

Sample preservation for speciation analysis - General recommendations | EVISA's News
Instrument database: Physical Electronics - TRIFT IV TOF-SIMS
Instrument database: Eppendorf - Centrifuges 5417 C and 5417 R
Instrument database: Retsch GmbH - PB 100 Paddle Blender
Instrument database: Claisse, Inc - The Bee-Electric Fluxer
Mercury is converted to oxidized species in the upper atmosphere facilitating its entrance into the food chain | EVISA's News
Directory of scientists: Manuel Hernández-Córdoba
Mercury Levels in Humans and Fish Around the World Regularly Exceed Health Advisory Levels | EVISA's News
Journals database: Critical Reviews in Environmental Science and Technology
Instrument database: Shimadzu Europe - SIL-HT HPLC Sample injection system
ICOBTE 2017: International Conference on the Biogeochemistry of Trace Elements | EVISA's Agenda of Events
Instrument database: ANALAB SARL - CLEANACID 1 liter with temperature regulator
Instrument database: Elemental Scientific Inc. (ESI) - SC-E2 Integrated Autosampler
Journals database: Journal of Applied Sciences and Environmental Management
ICBTECE 2017: 19th International Conference on Biogeochemistry, Trace Elements and Chemical Engineering | EVISA's Agenda of Events
Man is significantly contaminating oceans with mercury | EVISA's News
Link database: NRDC: Arsenic and Old Laws
Instrument database: Milestone S.r.l. - ETHOS MOD Microwave System for Open Digestion
Instrument database: PerkinElmer Inc. - Pyris 6 DSC
Instrument database: Varian Inc. - AA280FS