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On-site quick detection kit of ammonia nitrogen in water and preparation method

A technology for detecting reagents and kits, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, which can solve the problems of difficult effective control of time and adverse effects on the accuracy of test results, etc. , to achieve the effect of high accuracy, easy operation and elimination of influence

Inactive Publication Date: 2016-10-05
WENZHOU MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the temperature of water samples collected in different seasons and different regions is not the same, the time required for dissolving dry powder detection reagents is also different. It is difficult to effectively control the time required for the entire detection process, which also adversely affects the accuracy of the detection results.

Method used

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  • On-site quick detection kit of ammonia nitrogen in water and preparation method
  • On-site quick detection kit of ammonia nitrogen in water and preparation method
  • On-site quick detection kit of ammonia nitrogen in water and preparation method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0022] A rapid on-site detection kit for ammonia nitrogen in water, the kit is composed of the following substances:

[0023] Liquid ammonia nitrogen detection reagent 1 bottle (10ml)

[0024] Ammonia nitrogen standard color card 1 piece

[0025] The preparation method of this kit is realized through the following steps:

[0026] 1. Preparation method of liquid ammonia nitrogen detection reagent:

[0027] (1), weigh 17.5g salicylic acid, 2g disodium edetate, 15g sodium nitroferricyanide, add 800ml 50mmol / L pH6.0 sodium citrate buffer and stir to dissolve;

[0028] (2), add 50ml sodium hypochlorite, 0.2ml TritonX-100, stir to dissolve;

[0029] (3) Dilute to 1000ml with 50mmol / L pH6.0 sodium citrate buffer.

[0030] 2. Preparation method of ammonia nitrogen standard color card:

[0031] (1), accurately weigh 0.3819g superior grade pure ammonium chloride, dissolve it with deionized water and set the volume to 1000ml to obtain a concentration of 100mg / L ammonia nitrogen stoc...

Embodiment 2

[0037] In order to further prove the inventiveness of the present invention, the present invention has done following comparative experiment, investigates the impact of the change of reagent blank on the accuracy of measurement result. The on-the-spot rapid detection kit for ammonia nitrogen in water described in Example 1 of this law is the test group, and the detection kit that does not deduct the reagent blank and uses the standard color card for direct colorimetry is the control group, and the detection reagents of the two groups of kits are respectively Store in a 4°C refrigerator and a 37°C water bath for 7 days, and measure the same water sample whose ammonia nitrogen concentration is 0.10 mg / L by Nessler's reagent colorimetric method, and use deionized water instead of the water sample to perform a reagent blank test. Use 721 spectrophotometer to record the reagent blank value. During the test, the optical path of the cuvette is 1cm, the test wavelength is 630nm, and th...

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Abstract

The invention discloses an on-site quick detection kit of ammonia nitrogen in water. The on-site quick detection kit can eliminate a reagent blank influence. Accordingly, the invention further provides a preparation method of the reagent kit. According to the kit, in the existence of sodium nitroprusside, ammonia nitrogen in water reacts with salicylate and pypocholoride to generate a green compound, the color of the green compound is in direct proportion to the ammonia concentration, the color of an ammonia nitrogen standard color card with no reagent blank is superposed with the color of a blank tube and compared with a test tube, and the concentration of ammonia in a water sample to be detected is obtained, and the on-site quick detection kit is particularly suitable for on-site quick detection of ammonia nitrogen in water.

Description

technical field [0001] The invention relates to the field of water quality detection, in particular to an on-site quick detection kit for ammonia nitrogen in water and a preparation method thereof. Background technique [0002] Ammonia nitrogen refers to the free ammonia (NH 3 ) and ammonium ions (NH 4 + ) in the form of nitrogen, the source of ammonia nitrogen in water is mainly the decomposition products of nitrogen-containing organic matter in sewage under the action of microorganisms. At present, its main sources are urban domestic sewage and industrial and agricultural wastewater. For example, the use of various detergents in daily life; in the process of agricultural production, the use of nitrogen fertilizer will also produce ammonia nitrogen, which is directly discharged into the water body along with the sewage; industrial wastewater, such as coking wastewater and synthetic ammonia fertilizer factory wastewater, discharges ammonia into the environment These gase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 王陆栋冉敏洁李斌连国军
Owner WENZHOU MEDICAL UNIV
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