Improving Purified Water in a School Lab
The school’s laboratories require purified water for making up reagents, buffers and general laboratory use. They had always used a laboratory still, which is a device that boils water, using an electric immersion heater, like
an electric kettle, to produce steam and then condenses the steam to produce what is known as “distilled water”. This was wasteful of mains water and consumed a good deal of electricity. In addition, the rate of producing distilled water was slow, taking most of the day to fill a container. When a glass washing machine was installed the need for purified water increased to about 20 litres approximately per day, and Chemistry Technician, Alan Jaturned to Veolia Water Technology for help.
Veolia supplied a PURELAB Chorus 2. This uses a combination of reverse osmosis and ion exchange deionisation to deliver up to 20 l/h of Type 2 water, that is resistivity >10MΩ.cm, Total Organic Carbon <50μg/l and total viable bacteria count <10 cfu/ml. Type 2 water, an order of magnitude purer than distilled water, is delivered into an integral 30 litre storage tank which allows the glass washer to be filled very quickly with plenty of capacity remaining for general use. Valuable bench space was saved due to the stackable design of the PURELAB Chorus and storage tank.
The PURELAB Chorus 2 can be used for numerous applications in the school laboratory including replacing distilled water for glassware rinsing and making up standard solutions. It has low maintenance and operating costs, is simple to use and saves a good deal of Technician’s time in configuring.