Water samples for testing are increasingly containing high levels of chloride, often due to the ingress of seawater into coastal treatment works, and need extra suppression capability
Palintest has extended its range of Tubetest reagents for chemical oxygen demand (COD) with a new product which provides interference suppression for even very high levels of chloride. This adds to the company's COD range, providing a number of environmentally aware options that can now test everything from fresh water through to sea water without interference.
The Tubetest system offers a practical and convenient method of testing COD, vital for assessing the quality of effluents and wastewater prior to discharge.
The test predicts the oxygen requirement of effluent and is used for the monitoring and control of discharges, and for assessing treatment plant performance.
However, the presence of chloride in the sample can interfere with the result.
Until now the Palintest COD range dealt with levels of chloride up to approximately 2000mg/l. Increasingly, samples are containing much higher levels, often due to the ingress of seawater into coastal treatment works, and need extra suppression capability.
The test is therefore now available with two different levels of mercuric sulphate for chloride suppression, as well as being available mercury free for general use.
The option of using the lower mercury test has been retained as the new range should only be used if higher levels of mercury are specifically necessary.
This is the most environmentally aware approach and displays Palintest's commitment to minimising the use of toxic chemicals.
With the Tubetest system the reagents are supplied premixed and predispensed into borosilicate glass test tubes, which reduces contact with potentially hazardous chemicals to a minimum.
The ranges are all carefully formulated to be used with existing calibrations and instruments.
Palintest is also a licensed waste handler, and provides a collection service to its customers for the safe collection and responsible disposal of used tubes.
