The 'Precision' range of reagents has been designed for use on the Aquakem (formally Konelab) range of automated photometric analysers used in water and environmental laboratories. The current range of reagents are: TON, Nitrite, Ammonia, Phosphate, Sulphate and Chloride. Other reagents will be introduced during the coming months. To facilitate Good Laboratory Practice, reagents are supplied with a detailed Certificate of Performance and bar-coded labels