Ammonium (NH z) is an important indicator of water quality and is produced by the microbial decomposition of organic material or enters the water through fertilizers, wastewater, and agricultural runoff. Elevated ammonium concentrations can indicate contamination and must be monitored critically, especially in drinking water, aquariums, and fish farms. The limit for ammonium in drinking water in Germany is 0.5 mg/l NH z (Drinking Water Ordinance). In bodies of water, ammonium serves as a nutrient for algae and plants, although elevated concentrations can lead to eutrophication. Ammonium is toxic to fish – even small amounts can cause gill damage. Ammonium monitoring is essential in aquariums because, in the biological balance of the aquarium, bacteria first break down ammonium into nitrite and then into nitrate. Regular testing protects fish from poisoning and provides information about the functionality of the biological filter.
How does the test kit work?
The CALDUR® Ammonium Test Set – Colorimetric is based on the indophenol blue method. After adding three reagents to the water sample, a characteristic blue-green color develops within 8 minutes, the intensity of which is proportional to the ammonium concentration. The measurement is determined by direct color comparison with a supplied 6-step color chart. The method is highly specific for ammonium and exhibits only minimal cross-reactivity with other nitrogen compounds.
Advantages of the CALDUR® test set
Fast analysis in just 8 minutesIdeal for regular checks in aquariums, fish ponds and sewage treatment plants – immediate results
Wide measuring range from 0.1 to 10 mg/l NH zCovers the entire practically relevant area from drinking water to wastewater.
100 provisions per set – economical for continuous useCost-effective for daily checks in aquaculture, waterworks and environmental analysis
Colorimetrically usable with color chartEasy to use without additional equipment – perfect for mobile applications
Highly specific method without interferencePrecise measurement results even with complex water matrices
Robust, waterproof plastic housing with hinged lidSafe transport and protection of reagents – durable and reliable
Malaysia
