Milli-Q
Encyclopedia
Milli-Q is a trademark created by Millipore Corporation
to describe 'ultrapure' water of "Type 1", as defined by various authories (e.g. ISO 3696), as well as their devices for producing such water. The purification processes involve successive steps of filtration and deionisation, to achieve a purity expediently characterised in terms of resistivity (typically 18.2 MΩ·cm). When used in this fashion, the term has a fairly well-defined meaning.
The term is also commonly (mis)used as a genericised trademark to refer to other purified waters (and purification equipment), whether from other systems manufactured by Millipore (such as Elix), or from systems manufactured by other companies. When used in this fashion the term's meaning is less precise.
Milli-Q water uses resin filters and deionization to purify the water. The system monitors the ion concentration by measuring the electrical resistivity of the water. Higher resistivity means fewer charge-carrying ions. Most Milli-Q systems dispense the water through a 0.22 μm membrane filter.
It is capable of producing water pure enough to get reproducibility and accuracies within parts per million when using ion mass spectrometers in analytical geochemistry
. Other users of this system include microbiology
and atmospheric science.
Millipore Corporation
EMD Millipore, also known as Merck Millipore outside the United States and Canada, was founded in 1954, listed among the S&P 500 since the early 1990s, is an international biosciences company, known widely for its micrometer pore-size filters and tests...
to describe 'ultrapure' water of "Type 1", as defined by various authories (e.g. ISO 3696), as well as their devices for producing such water. The purification processes involve successive steps of filtration and deionisation, to achieve a purity expediently characterised in terms of resistivity (typically 18.2 MΩ·cm). When used in this fashion, the term has a fairly well-defined meaning.
The term is also commonly (mis)used as a genericised trademark to refer to other purified waters (and purification equipment), whether from other systems manufactured by Millipore (such as Elix), or from systems manufactured by other companies. When used in this fashion the term's meaning is less precise.
Milli-Q water uses resin filters and deionization to purify the water. The system monitors the ion concentration by measuring the electrical resistivity of the water. Higher resistivity means fewer charge-carrying ions. Most Milli-Q systems dispense the water through a 0.22 μm membrane filter.
It is capable of producing water pure enough to get reproducibility and accuracies within parts per million when using ion mass spectrometers in analytical geochemistry
Geochemistry
The field of geochemistry involves study of the chemical composition of the Earth and other planets, chemical processes and reactions that govern the composition of rocks, water, and soils, and the cycles of matter and energy that transport the Earth's chemical components in time and space, and...
. Other users of this system include microbiology
Microbiology
Microbiology is the study of microorganisms, which are defined as any microscopic organism that comprises either a single cell , cell clusters or no cell at all . This includes eukaryotes, such as fungi and protists, and prokaryotes...
and atmospheric science.
External links
- Official Web Site This is the Millipore website describing their product.