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Simple test paper for determining ammonia in air, and preparation and determination methods thereof

An air and test paper technology, which is applied to the simple test paper for measuring ammonia in the air and the fields of its preparation and measurement, can solve the problems of large naked eye color discrimination error and the like, and achieve the effects of small measurement error, convenient use and portability, and low cost.

Active Publication Date: 2018-11-09
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commercially available ammonia content test paper is mainly based on visual colorimetry, but there is a large error in color discrimination by naked eyes

Method used

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  • Simple test paper for determining ammonia in air, and preparation and determination methods thereof
  • Simple test paper for determining ammonia in air, and preparation and determination methods thereof

Examples

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Embodiment 1

[0052] A simple test paper for measuring ammonia in the air, its structure diagram is shown in figure 1 , specifically the test paper loaded with thymol blue, sulfuric acid and CTMAB, wherein, by mass ratio, thymol blue:acid:CTMAB=0.12:0.48×10 -4 : 0.2×10 -3 .

[0053] The simple test paper for measuring ammonia in the air is a chromatographic filter paper strip, which is 80mm long and 3mm wide.

[0054] A preparation method of a simple test paper for measuring ammonia in the air, comprising the following steps:

[0055] Step 1, Prepare Soaking Solution

[0056] Dissolve thymol blue in absolute ethanol to obtain thymol blue ethanol solution, add (1+2) sulfuric acid solution and mix well, then add CTMAB aqueous solution with a mass concentration of 0.1%, mix well, dilute to 100mL with ethanol, Obtain the soaking solution; wherein, in the 100mL soaking solution, the ingredients contained and the addition amount of each component are: thymol blue is 0.12g, (1+2) sulfuric acid...

Embodiment 2

[0074] A simple test paper for measuring ammonia in the air, its structure diagram is shown in figure 1 , specifically loaded with thymol blue, sulfuric acid and CTMAB test paper, wherein, by mass ratio, thymol blue: acid: dodecyltrimethylammonium bromide = 0.02: 1.8 × 10 -5 : 0.1×10 -3 .

[0075] The simple test paper for measuring ammonia in the air is a chromatographic filter paper strip, which is 80mm long and 3mm wide.

[0076] A preparation method of a simple test paper for measuring ammonia in the air, comprising the following steps:

[0077] Step 1, Prepare Soaking Solution

[0078] Dissolve thymol blue in absolute ethanol to obtain thymol blue ethanol solution, add (1+2) sulfuric acid solution and mix well, then add dodecyltrimethylammonium bromide aqueous solution with a mass concentration of 0.1%, and mix Evenly, dilute to 100mL with ethanol to obtain the soaking solution; wherein, in the 100mL soaking solution, the ingredients contained and the addition amount ...

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Abstract

The invention provide simple test paper for determining ammonia in the air, and preparation and determination methods thereof, belonging to the technical field of environmental monitoring. The simpletest paper for determining ammonia in the air is test paper loaded with thymol blue, sulfuric acid and a cationic surfactant in a mass ratio of (0.02-0.18): (1.8-4.8)*10<5>: (0.4-2)*10<4>. The preparation method comprises the following steps: preparing a soaking solution, soaking filter paper or chromatographic filter paper in the soaking solution, and then carrying out drying and plastic sealingso as to obtain the simple test paper for determining ammonia in the air. One side of the test paper is cut apart and placed in a detection area; ammonia in the air in the detection area reacts with areagent in the simple test paper for determining ammonia in the air; and the length of a color-developed band is read so as to obtain the concentration of ammonia in the air in the detection area. The determination method is simple, visual and effective; the preparation method is simple in process; and the test paper is sensitive and has few errors.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, in particular to a simple test paper for measuring ammonia in the air and a preparation and measurement method thereof. Background technique [0002] Ammonia is an important basic chemical raw material and product. It is easy to volatilize into the air and is one of the main air pollutants and one of the main pollutants that endanger human health. If people are in the air containing high concentration of ammonia, they will suffer from acute ammonia poisoning, so it is of great significance to quickly and easily determine the ammonia content. [0003] The detection methods of ammonia mainly include spectrophotometry, electrochemical method and rapid detection tube method. The conventional method is spectrophotometry, including: phenol spectrophotometry, Nessler's reagent spectrophotometry, sodium hypochlorite-salicylic acid method, etc. [0004] The spectrophotometry system is s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/783G01N2021/7759
Inventor 高俊杰余萍尹杰作
Owner SHENYANG LIGONG UNIV
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