New Economical Heater Block for COD Testing

September 2005

Water analysis specialist Palintest has introduced a new, high capability, multi-tube heater block. The block is ideal for chemical oxygen demand (COD) reactions and enables Palintest to offer economical COD test kits for use with its Tubetest® system. These include heater block, test tube rack, photometer adaptor and micropipettor.

The heater block is a microprocessor controlled incubator with a dual LED display. Its multi-tube block offers significant advantages in space saving and power consumption over the traditional method. Temperature is settable from 30°C to 200°C with timer control. It offers rapid heat up rate within 15 minutes from ambient to 100°C, and features stability, uniformity and accuracy of +/- 1°C.

The Palintest Tubetest® system offers a simple, quick and convenient method of testing COD which conforms to the ISO standard on sealed-tube COD testing (BS ISO 15705:2002). A sample is added to a Tubetest® tube, it is digested for two hours at 150°C, cooled and the test colour measured using a Palintest photometer.

The COD test is vital for assessing the quality of effluents and wastewater prior to discharge. The liquid reagents are supplied pre-measured in labelled, disposable test tubes, and Palintest's Photometer 8000 provides instant test recognition and reading, for accurate results.

COD is probably the most widely tested parameter in pollution control. The test is used by a wide range of industrial plants, food and beverage companies, and contract labs.