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General Laboratory Grade DI Water

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General Laboratory Grade Water. Type 2 Water

Triple Red manufacture, install, commission, service and maintain a comprehensive range of Water purification systems in the Geno range.

Our high-quality water systems are manufactured in the UK to the most demanding standards. Triple Red holds all spare parts and consumables (on our own and other manufacturer's systems) for local delivery. Our local teams of expert water engineers can carry out your routine servicing and maintenance. Complete turnkey packages for installation, commissioning and on-going service are available.

Your service starts with the correct solution recommendation of our Area Manager and continues throughout the lifetime of the product. All this is supported by the unrivalled service from our office staff and UK wide team of local engineers. Whether you require planned preventative maintenance or 24/7 cover, it can be provided to fit the needs of your laboratory.

Type 2 water used for general laboratory applications is often referred to as general grade laboratory water. It is produced using reverse osmosis and an additional technology used such as ion exchange or electrical ion exchange (EDI).

How does Deionisation (DI) work?

Deionization is a chemical process which uses specially manufactured ion-exchange resins which exchange hydrogen ion and hydroxide ion for dissolved minerals, which then recombine to form water. Deionised water has typically had its mineral ions removed, such as cations from sodium, calcium, iron, and copper, and anions such as chloride and sulphate.

DI Water

Laboratory deionisers incorporate mixed bed cartridges of ion exchange resins that are discarded. Deionisation functions by exchanging hydrogen ions for cationic contaminants and hydroxyl ions for anionic contaminants in the feed water. The ion exchange resin beds are made up of tiny spherically shaped bead through which the water passes. After a period of time, cations and anions will have replaced all the hydrogen and hydroxyl in the resins and the cartridges will need to be replaced. 

How does Electrodeionisation (EDI) work?


EDI Diagram


EDI Technology

RO/EDI systems feature an EDI module that consists of ion exchange resins used in single beds for enhanced water purification. Microbiological analysis of product water shows a high decrease in proliferation of bacteria due to the high pH swing between the 2 cells and direct contact of resin and electrodes. Furthermore, an intermediate pH shift has a positive effect on the separation of SiO2 (Silicon Dioxide) and CO2 (Carbon Dioxide). We also see a remarkable reduction in the number of bacteria with high colony forming unit (CFU) counts from the feedwater, as electrodes in the water make it unsuitable for bacteria to live.

EDI’s Clear Advantage Is Continuous Operation

EDI Technology is designed to have the module continually regenerate itself, without any acids or alkalis. This technology is a cost effective way to ensure pure water when you need it and also benefits the environment because of less required consumables. The combination of RO membranes and the EDI module offers minimal down time which means fewer process interruptions for you.

Water quality for Type 2 systems is 1-15meg ohm with low organics

Read more about water technology, service and Triple Red DI water systems