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Mixed indicator test paper with enhanced sensitivity and loaded with long-chain alkyl pyridine for detecting ammonia in air and preparation method thereof

A long-chain alkylpyridine and mixed indicator technology, which is applied in the direction of material analysis, measuring devices, instruments, etc. by observing the impact on chemical indicators, can solve the problems of unsuitable rapid detection and non-professional use, and achieve remarkable results The effect of promoting application value, low production cost, and increased length

Inactive Publication Date: 2019-02-19
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although its method is mature and accurate, it is not suitable for rapid detection and non-professional use

Method used

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  • Mixed indicator test paper with enhanced sensitivity and loaded with long-chain alkyl pyridine for detecting ammonia in air and preparation method thereof
  • Mixed indicator test paper with enhanced sensitivity and loaded with long-chain alkyl pyridine for detecting ammonia in air and preparation method thereof

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Effect test

Embodiment 1

[0044] A long-chain alkylpyridine sensitization mixed indicator test paper for measuring ammonia in the air, specifically, bromocresol purple sodium salt, bromothymol blue sodium salt, and surfactant bromidecetyl are loaded on the chromatographic filter paper Pyridine (CPB) test paper; by mass ratio, bromocresol purple sodium salt: bromothymol blue sodium salt: surfactant cetylpyridine bromide (CPB)=6:8:0.1.

[0045] The long-chain alkylpyridine sensitization mixed indicator test paper for measuring ammonia in the air has a length of 40-80 mm and a width of 2-5 mm.

[0046] A method for preparing a long-chain alkylpyridine sensitization mixed indicator test paper for measuring ammonia in air, comprising the following steps:

[0047] Step 1, Prepare Soaking Solution

[0048] Bromocresol purple sodium salt was dissolved in ammonia-free water to obtain bromocresol purple sodium salt solution;

[0049] Dissolving bromothymol blue sodium salt in ammonia-free water to obtain bromoth...

Embodiment 2

[0076] A long-chain alkylpyridine sensitization mixed indicator test paper for measuring ammonia in the air, which is loaded with bromocresol purple sodium salt, bromothymol blue sodium salt, cetylpyridine chloride (CPC) on the chromatographic filter paper : The ratio is by mass ratio, bromocresol purple sodium salt, bromothymol blue sodium salt, surfactant cetylpyridinium chloride (CPC)=6:8:0.1.

[0077] The long-chain alkylpyridine sensitization mixed indicator test paper for measuring ammonia in the air is 80mm long and 4mm wide.

[0078] A method for preparing a long-chain alkylpyridine sensitization mixed indicator test paper for measuring ammonia in air, comprising the following steps:

[0079] Step 1, Prepare Soaking Solution

[0080] Add a certain proportion of bromothyme pink sodium salt, bromocresol purple sodium salt, and a surfactant into a container of a certain volume, dilute to the volume with ammonia-free water, and shake well to obtain a soaking solution, whe...

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Abstract

The invention discloses a mixed indicator test paper with enhanced sensitivity and loaded with long-chain alkyl pyridine for detecting ammonia in air and a preparation method thereof, and belongs to the field of rapid environment detection and industrial hygiene. The test paper is loaded with bromocresol purple sodium salt, bromothymol blue sodium salt, and long-chain alkyl pyridine on the base paper, wherein the bromocresol purple sodium salt, the bromothymol blue sodium salt, and the long-chain alkyl pyridine have a mass ratio of (4-10):(6-10):(0.02-0.2). The preparation method comprises thefollowing steps of: preparing a soaking solution according to the loading reagent; soaking the base paper; and performing drying and encapsulating. The test paper acts with ammonia gas according to asynergistic reaction between the bromocresol purple sodium salt and the bromothymol blue sodium salt, the color change is obvious, the edge of reaction color of the test paper is clear, the measurement is convenient to observe, and the precision is high. The bromocresol purple sodium salt and the bromothymol blue sodium salt disperse better by the long-chain alkyl pyridine, which creates better uniformity on the filter paper, thereby increasing the length of the test paper color changing strip and improving the sensitivity.

Description

technical field [0001] The invention belongs to the fields of rapid environmental detection and industrial sanitation, and relates to a long-chain alkylpyridine-sensitized mixed indicator test paper for measuring ammonia in the air and a preparation method thereof. Background technique [0002] Ammonia has many sources in life. During the construction process, some elements such as concrete antifreeze are often added to the cement for a long time, and ammonia gas is released relatively slowly. Indoor decoration materials, brighteners and additives used in materials will all use ammonia water, these materials will release ammonia gas, the concentration of ammonia gas higher than the normal value is harmful to human body, poultry, plants, etc. The excessive presence of ammonia in the air reduces the moisture of the skin tissue, and even denatures the tissue protein and deteriorates the cell membrane structure. It can reduce the resistance of the human body, because ammonia g...

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 高俊杰余萍刘晓鹏
Owner SHENYANG LIGONG UNIV
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