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Test paper for semi-quantitative determination of ammonia concentration in air, and preparation method and determination method thereof

A determination method and technology of ammonia concentration, which are applied in measuring devices, material analysis and instruments by observing the influence on chemical indicators, can solve the problems of large naked eye color discrimination errors, etc., and achieve low production cost and significant popularization and application value. , the effect of increasing sensitivity

Active Publication Date: 2018-09-14
沈阳中天星艺环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The test strips on the market are mainly based on visual colorimetry, but there is a large error in color discrimination by naked eyes

Method used

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  • Test paper for semi-quantitative determination of ammonia concentration in air, and preparation method and determination method thereof
  • Test paper for semi-quantitative determination of ammonia concentration in air, and preparation method and determination method thereof

Examples

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Effect test

Embodiment 1

[0051] A test paper for semi-quantitative determination of ammonia concentration in the air, its structure diagram is shown in figure 1 , specifically test paper loaded with bromocresol green, Tween 80 and sulfuric acid, wherein, by mass ratio, bromocresol green: sulfuric acid: Tween 80 = 1.4: 6.5 × 10 -6 : 0.003.

[0052]The test paper for the semi-quantitative determination of the ammonia concentration in the air is a chromatographic filter paper strip loaded with reagents, which is 80 mm long and 4 mm wide.

[0053] A preparation method of a test paper for semi-quantitative determination of ammonia concentration in air, comprising the following steps:

[0054] Step 1, Prepare Soaking Solution

[0055] Dissolve bromocresol green in absolute ethanol, add a sulfuric acid solution with a mass volume concentration of 0.1%, add Tween 80 solution, mix well, add ethanol to dilute to 100mL, and obtain a soaking solution; wherein, the ingredients contained in the soaking solution ...

Embodiment 2

[0075] A test paper for semi-quantitative determination of ammonia concentration in the air is a test paper loaded with bromocresol green, Tween 80 and hydrochloric acid, wherein the content mass ratio of each component is, bromocresol green: hydrochloric acid: Tween 80=0.5 : 1.3×10 -5 : 0.5×10 -3 .

[0076] The test paper for the semi-quantitative determination of the ammonia concentration in the air is a chromatographic filter paper strip loaded with reagents, which is 80 mm long and 4 mm wide.

[0077] A preparation method of a test paper for semi-quantitative determination of ammonia concentration in air, comprising the following steps:

[0078] Step 1, Prepare Soaking Solution

[0079] Dissolve bromocresol green in 95% ethanol, add hydrochloric acid solution with a mass volume concentration of 0.1%, add Tween 80 solution, mix well, add ethanol to dilute to 100mL, and obtain a soaking solution; wherein, the soaking solution contains Components and the mass volume conce...

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Abstract

The invention discloses test paper for semi-quantitative determination of ammonia concentration in the air, and a preparation method and a determination method thereof, and belongs to the technical field of environmental monitor. The test paper is loaded with bromocresol green, nonionic surfactants and acids, wherein the bromocresol green, the acids and the nonionic surfactants are in a ratio of (0.5-1.4) to (0.94-13.1)*10<-6> to (0.5-3)*10<-3>. The preparation method includes soaking filter paper or chromatography filter paper into prepared soaking liquid, and drying and plastically packagingthe filter paper or the chromatography filter paper to acquire the test paper for semi-quantitative determination of the ammonia concentration in the air. The determination method includes cutting off one end of the test paper for semi-quantitative determination of the ammonia concentration in the air, putting the test paper in a detection region, and after 7-30 minutes of reaction, acquiring theammonia concentration in the air of the detection region according to the change length of blue along the color-changeable test paper. The uniformity and the manufacture cost of the test paper are lower than the uniformity and the manufacture cost of a gas detector, and the test paper is convenient to use and has remarkable promotion and application value.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, in particular to a test paper for semi-quantitatively measuring the ammonia concentration in the air and a preparation and measuring method thereof. Background technique [0002] People are extremely sensitive to the ammonia content in the air. If the human body inhales a large amount of ammonia gas in a short period of time, clinical symptoms such as tearing, sore throat, hoarseness, cough, bloodshot sputum, chest tightness, and dyspnea will appear, accompanied by dizziness, headache, Nausea, vomiting, fatigue, etc. In severe cases, pulmonary edema and respiratory irritation may occur. Ammonia is an important basic chemical raw material and product. In the working environment of some chemical plants, workshops, fertilizer plants, etc., workers are exposed to the air with high concentration of ammonia for a long time, and they will suffer from acute ammonia poisoning. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/783
Inventor 余萍万芹莉
Owner 沈阳中天星艺环保科技有限公司
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