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Method for rapidly detecting ammonia nitrogen removal rate

A technology of removal rate and ammonia nitrogen, applied in the measurement of color/spectral characteristics, etc., can solve the problems of great harm to operators and the environment, strong toxicity of Nessler reagents, and large amount of reagents and samples, so as to shorten the measurement time and the detection speed. Fast, reduce harm and the effect of environmental pollution

Inactive Publication Date: 2015-04-01
FUYANG NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More importantly, Nessler's reagent spectrophotometry requires a large amount of reagents and samples, which requires a large amount of toxic reagents tetraiodomercuric potassium and strong base. Although this method has the characteristics of easy operation and sensitivity, Nessler's reagent Very toxic and harmful to operators and the environment

Method used

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  • Method for rapidly detecting ammonia nitrogen removal rate
  • Method for rapidly detecting ammonia nitrogen removal rate
  • Method for rapidly detecting ammonia nitrogen removal rate

Examples

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Effect test

Embodiment 1

[0011] Example 1: Detection of low concentration ammonia nitrogen

[0012] 1. Preparation of Potassium Sodium Tartrate Solution

[0013] Weigh 50.0g potassium sodium tartrate (KNaC 4 h 6 o 6 ) in 100ml of water, add 3 drops of 25% sodium hydroxide solution (NaOH, m / v), heat to boil, then dilute to 100ml after cooling to obtain a 50% sodium potassium tartrate solution.

[0014] 2. Preparation of Nessler's reagent

[0015] Mercury dichloride-potassium iodide-potassium hydroxide (HgCl 2 , -KI-KOH) solution.

[0016] Weigh 15.0g of potassium hydroxide (KOH), dissolve it in 50ml of water, and cool to room temperature.

[0017] Weigh 5.0g of potassium iodide (KI), dissolve it in 10ml of water, and mix 2.50g of mercuric dichloride (HgCl 2 ) powder into the potassium iodide solution several times until the solution turns dark yellow or a light red precipitate appears and dissolves slowly, stir and mix thoroughly, and add a saturated solution of mercuric dichloride dropwise, whe...

Embodiment 2

[0030] Embodiment two: the detection of medium concentration ammonia nitrogen

[0031] 1. Preparation of Potassium Sodium Tartrate Solution

[0032] Weigh 50.0g potassium sodium tartrate (KNaC 4 h 6 o 6 ) in 100ml of water, add 3 drops of 25% sodium hydroxide solution (NaOH, m / v), heat to boil, then dilute to 100ml after cooling to obtain a 50% sodium potassium tartrate solution.

[0033] 2. Preparation of Nessler's reagent

[0034] Mercury dichloride-potassium iodide-potassium hydroxide (HgCl 2 , -KI-KOH) solution.

[0035] Weigh 15.0g of potassium hydroxide (KOH), dissolve it in 50ml of water, and cool to room temperature.

[0036] Weigh 5.0g of potassium iodide (KI), dissolve it in 10ml of water, and mix 2.50g of mercuric dichloride (HgCl 2 ) powder into the potassium iodide solution several times until the solution turns dark yellow or a light red precipitate appears and dissolves slowly, stir and mix thoroughly, and add a saturated solution of mercuric dichloride d...

Embodiment 3

[0049] Example three: detection of high concentration ammonia nitrogen

[0050] 1. Preparation of Potassium Sodium Tartrate Solution

[0051] Weigh 50.0g potassium sodium tartrate (KNaC 4 h 6 o 6 ) in 100ml of water, add 3 drops of 25% sodium hydroxide solution (NaOH, m / v), heat to boil, then dilute to 100ml after cooling to obtain a 50% sodium potassium tartrate solution.

[0052] 2. Preparation of Nessler's reagent

[0053] Mercury dichloride-potassium iodide-potassium hydroxide (HgCl 2 , -KI-KOH) solution.

[0054] Weigh 15.0g of potassium hydroxide (KOH), dissolve it in 50ml of water, and cool to room temperature.

[0055] Weigh 5.0g of potassium iodide (KI), dissolve it in 10ml of water, and mix 2.50g of mercuric dichloride (HgCl 2 ) powder into the potassium iodide solution several times until the solution turns dark yellow or a light red precipitate appears and dissolves slowly, stir and mix thoroughly, and add a saturated solution of mercuric dichloride dropwise...

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Abstract

The invention discloses a method for rapidly detecting an ammonia nitrogen removal rate. The method comprises steps of preparation of a potassium sodium tartrate solution with the concentration of 50%, preparation of a Nessler reagent, preparation of ammonia nitrogen standard working solutions, establishment of standard curves and sample measurement. According to the method, the ammonia nitrogen standard working solutions with high, medium and low concentrations are set; when the ammonia nitrogen concentration in the sample cannot be ensured, the ammonia nitrogen standard working solutions with different concentrations can be simultaneously used, different standard curves are established for determining the ammonia nitrogen concentration of a detected sample, and the ammonia nitrogen removal rate is obtained through formula computing. The toxic reagent use amount is effectively reduced, harm to an operator and environmental pollution are reduced, the detecting speed is high, and the application range is wide.

Description

technical field [0001] The invention relates to an efficient and fast method for detecting the removal rate of ammonia nitrogen, which belongs to the field of chemical industry. Background technique [0002] In the various technical schemes for controlling environmental ammonia nitrogen pollution, the pros and cons of the methods used must be tested by the ammonia nitrogen removal rate. The screening of strains with strong and weak ammonia nitrogen removal capabilities also needs to be judged by the ammonia nitrogen removal rate. It plays a very important role in the recycling and hazard identification of domestic water or wastewater. At present, the commonly used methods for the determination of ammonia nitrogen in water bodies include colorimetry (Nessler's reagent spectrophotometry, phenol-hypochlorite colorimetry, salicylic acid-hypochlorite colorimetry), distillation-titration, ion chromatography method, flow injection method, ammonia gas sensitive electrode method, et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
Inventor 姬云涛屈长青曹美霞姜双林苏莹洁范海燕
Owner FUYANG NORMAL UNIVERSITY
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