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What is deionised Water; Urgent!

What Is Deionised water? I can not find it anywhere. Please let me know ASAP before December 12th. I could use the information.

Thank you,

Rachael
- Salem, New Jersey
2002

Deionised water is the term used by laymen and usually means purified process water which has most of the dissolved solids removed.

There are different levels of purity or deionisation, usually any water <1 microsiemen can be considered. It depends on the application.

Processes used to achieve deionised water (DI water) can be one or a combination of the following : reverse osmosis/membrane filtration, ion-exchange or electrodeionisation.

Daniel Pang
Scottscenter Pte Ltd - Singapore
2002

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