Deionised Water
As a rule, liquid reagents do not consist of a single preparation but comprise several components that need to be added to the sample in a certain order.
As both the size and the number of drops have a decisive effect on the resultant colour complex, the reagents need to be added with a high degree of precision.
The shelf life of liquid reagents is reduced by temporary contact with oxygen in the air when the bottle is opened as well as by unsuitable storage environments (presence of sunlight or high temperatures).
* HACH® is a registered trademark of Hach Company, Loveland, Colorado / HACH LANGE GmbH, Düsseldorf, Germany. The use of the HACH® trademark does not imply any affiliation with or approval by Hach Company / HACH LANGE GmbH regarding the formulation, testing or suitability of these products for use in HACH® brand spectrophotometers or other devices or systems.