Pretreatment device for detecting content of ammonia nitrogen in water sample and use method of device

Abstract

The invention provides a pretreatment device for detecting the content of ammonia nitrogen in a water sample. The pretreatment device comprises an adjustable electric furnace (1); a to-be-detected water sample distillation assembly (2) is positioned on the adjustable electric furnace (1) and is connected with one end of a first connection tube (3), the other end of the first connection tube (3) is connected with one end of a condensation tube (4), the condensation tube (4) is connected to a second connection tube (5), and the other end of the second connection tube (5) is inserted in a colorimetric tube (6). The pretreatment device is characterized in that the to-be-detected water sample distillation assembly (2) comprises a to-be-detected water sample reagent bottle (201) and a distillation bottle (202). The pretreatment device for detecting the content of ammonia nitrogen in the water sample has the advantages that the distillation procedure of a to-be-tested water body is accelerated, the distillation time is shortened, water samples for distillation are reduced, the cost is reduced, and the detection efficiency is improved; for the measurement of ammonia nitrogen, the anti-interference property is excellent, and the measurement is quick, accurate and reliable.

Description

technical field [0001] The invention belongs to the technical field of water quality detection equipment, and in particular relates to a pretreatment device for detecting ammonia nitrogen content in water samples and a method for using the same. Background technique [0002] Ammonia nitrogen content is the main indicator of water environment monitoring, and the amount of ammonia nitrogen content is an important monitoring indicator for judging the degree of water pollution. Ammonia nitrogen widely exists in surface water and groundwater, and ammonia nitrogen exists in water in the form of free ammonia or ammonium salt. The source of ammonia nitrogen in water is mainly the nitrogen-containing organic matter in domestic sewage decomposed by microorganisms and some industrial wastewater such as coking wastewater, synthetic ammonia fertilizer factory wastewater, and farmland discharge. [0003] At present, Nessler colorimetric measurement is a routine method for the determinati...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for detecting the ammonia nitrogen content of water samples, aiming at the technical defects that the pretreatment volume of the existing water sample ammonia nitrogen content detection is relatively large, and it needs to consume more water samples to be tested and time-consuming. The pretreatment device can speed up the distillation process of the water body to be tested, shorten the distillation time, reduce the water samples required for distillation, save costs and improve the detection efficiency

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