Ammonia nitrogen detection reagent applicable to water automatic ammonia nitrogen detection system

Abstract

The invention discloses an ammonia nitrogen detection reagent applicable to a water automatic ammonia nitrogen detection system. The reagent comprises liquid A and liquid B, wherein the liquid A contains 2 to 10 percent (w / v) of a color developing agent, 0.08 to 0.5 percent (w / v) of a catalyst, and 5 to 25 percent (v / v) of a solubilizer; the pH value of the liquid A is 7 to 8; the liquid B contains 1 to 18 (w / v) percent of a masking agent, and 1 to 5 (w / v) percent of a chlorinating agent; the pH value of the liquid B is 10 to 11. The ammonia nitrogen detection reagent combines a plurality of components into a stable two-component system, and completely solves problems in the prior art. The reagent is nontoxic, does not have corrosivity, greatly reduces the movement difficulty, and improvesthe reliability, the time for keeping the reagent out of the sun can reach 2 months or more, the testing reading duration is only 10 to 15 minutes, and the testing measuring range can reach 0.2 to 5.0mg / L.

Description

technical field [0001] The invention relates to a detection reagent, in particular to an ammonia nitrogen detection reagent suitable for an automatic ammonia nitrogen detection system in water bodies. Background technique [0002] Ammonia nitrogen (NH 3 -N) with free ammonia (NH 3 ) or ammonium salt (NH 4+ ) form exists in water, and the composition ratio of the two depends on the pH value of the water. When the pH is high, the proportion of free ammonia is high. On the contrary, the proportion of ammonium salt is high. The sources of ammonia nitrogen in water are mainly the decomposition products of nitrogen-containing organic matter in domestic sewage under the action of microorganisms, certain industrial wastewater, such as coking wastewater and wastewater from synthetic ammonia fertilizer plants, and farmland drainage. In addition, in an oxygen-free environment, nitrite present in water can also be reduced to ammonia by microorganisms. In an aerobic environment, am...

AI Technical Summary

Problems solved by technology

The Nessler method is widely used, but the drug toxicity is high and the pollution is serious, especially not suitable for long-term on-site detection of aquaculture; the salicylic acid method has high requirements on pH control and test environment, and the test range is narrow. In the range of 0.2~1.2mg / L; the color development time of the phenol method is too long, and it is difficult to read the data under the automatic monitoring state

The laboratory has a very mature traditional classic spectrophotometric test method, but the operation is cumbersome, the reagents are seriously polluted, and the reading time is too long

Moreover, when these classic test methods are applied in the laboratory, reagents can be added manually at different times and in multiple batches, while automatic online monitoring should minimize the number of reagent addition batches to reduce the complexity of the equipment and increase reliability; at the same time, Reagents with strong alkali, strong acid and heavy pollution are not suitable for long-term on-line monitoring instruments. Once leaked, it will cause corrosion damage to the instrument itself and pollute nearby water bodies; in addition, the reagents used in the existing methods cannot be stored for a long time. Many reagents have a very short storage time

These have caused it to be unable to be applied to automatic ammonia nitrogen detection equipment in water bodies