In biology a thin, pliable layer of tissue covering surfaces or separating or connecting regions, structures, or organs of an animal or a plant.
In chemistry a membrane is a thin sheet of natural or synthetic material that can be penetrated, especially by liquids or gases.
In environmental applications of nanotechnology a membrane can be used as a filter.

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

Journals database: Journal of Physiology (London)
As 2016: 6th International Congress on Arsenic in the Environment | EVISA's Agenda of Events
All about electrophoresis - Resources related to Electrophoresis | EVISA's News
Journals database: Bio-medical Materials and Engineering
Instrument database: Analytik Jena AG - mercur – Combined AAS/AFS spectrometer for mercury determination
Instrument database: Teledyne Instruments Leeman Labs Inc. - Hydra AF Gold Plus Mercury Analyzer
Instrument database: Teledyne CETAC Technologies - Aridus II™ Desolvating Nebulizer System
Journals database: Computers and Chemical Engineering
Journals database: Biopharmaceutics and Drug Disposition
Kelp manufacture contributed to arsenic pollution of remote Scottish islands | EVISA's News
As 2018: The 7th International Congress & Exhibition On “Arsenic In The Environment" | EVISA's Agenda of Events
Liquid-liquid extraction in speciation analysis | EVISA's News
Journals database: Analytical Biochemistry
LC-ICP-MS: The most often used hyphenated system for speciation analysis | EVISA's News
Instrument database: Teledyne CETAC Technologies - AridusTM Desolvating Nebulizer System
Instrument database: Zinsser Analytic GmbH - Perifill®IQ 2000 MK 3A data store
Link database: SSWM: Arsenic Removal Techniques
Instrument database: Dionex Corporation - ICS-1100 Basic Integrated IC System
Instrument database: Shimadzu Europe - AXIMA-CFR plus MALDI TOF Mass Spectrometer
Journals database: Instrumentation Science and Technology