Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Ammonia nitrogen test paper and application method thereof

A technology for detecting test paper and ammonia nitrogen, applied in the field of chemical analysis, can solve the problems of limiting the rapid determination of ammonia nitrogen, cumbersome measurement steps, long color development time, etc., and achieves the effects of short color development time, low price and strong mobility

Inactive Publication Date: 2015-04-29
HEBEI UNIV OF TECH
View PDF3 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional measurement steps are cumbersome, the color development time is long, and it takes about 1 hour, and the water sample must be transported to the laboratory for measurement, which is prone to secondary pollution and limits the rapid determination of ammonia nitrogen.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ammonia nitrogen test paper and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Prepare the ammonia-free aqueous solution containing sodium salicylate 280g / L, potassium sodium tartrate 50g / L and sodium nitroferricyanide 0.40g / L. Immerse all the quantitative medium-speed filter paper in the solution, and shake it on a constant temperature oscillator for 90 minutes. Take out the filter paper, place it in parallel at room temperature, hang it in the air to dry, cut it and seal it for later use, and then make ammonia nitrogen test paper.

[0021] 2. Activator: take the calibrated analytically pure sodium hypochlorite, dilute it with ammonia-free water and sodium hydroxide solution (2mol / L) to form sodium hypochlorite containing an available chlorine concentration of 3.5g / L and a free alkali concentration of 0.75mol / L (calculated as NaOH) Use liquid.

[0022] 3. Preparation of standard color chart: Accurately weigh ammonium chloride (dried at 110°C for 2 hours) and dissolve it in ammonia-free water to prepare nitrogen-containing standard solutions w...

Embodiment 2

[0027] 1. Prepare the ammonia-free aqueous solution that concentration is to contain sodium salicylate 380g / L, potassium sodium tartrate 68g / L and sodium nitroferricyanide concentration 0.54g / L. Immerse all the quantitative medium-speed filter paper in the solution, and shake it on a constant temperature oscillator for 90 minutes. Take out the filter paper, place it in parallel at room temperature, hang it in the air to dry, cut it and seal it for later use, and then make ammonia nitrogen test paper.

[0028] 2. Activator: take the calibrated analytically pure sodium hypochlorite, dilute it with ammonia-free water and sodium hydroxide solution (2mol / L) to form sodium hypochlorite containing an available chlorine concentration of 3.5g / L and a free alkali concentration of 0.75mol / L (calculated as NaOH) Use liquid.

[0029] 3. Preparation of standard color chart: Accurately weigh ammonium chloride (dried at 110°C for 2 hours) and dissolve it in ammonia-free water to prepare nitr...

Embodiment 3

[0032] Other steps are the same as in Example 1, except that the ammonia-free aqueous solution contains 330 g / L of sodium salicylate, 59 g / L of potassium sodium tartrate and 0.47 g / L of sodium nitroferricyanide.

[0033] The result measured with this test paper is compared with the result measured by the standard method with Table 1 in Example 1, consistent with the standard result, and the test paper can accurately measure the ammonia nitrogen content in various water qualities.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses ammonia nitrogen test paper and an application method thereof. The test paper is prepared according to the following steps: (1) preparing a reagent solution, namely dissolving analytically pure sodium salicylate, sodium potassium tartrate tetrahydrate and sodium nitroprusside in ammonia-free water to prepare a solution in which the concentration of the sodium salicylate is 280g / L to 380g / L, the concentration of the sodium potassium tartrate tetrahydrate is 50g / L to 68g / L and the concentration of the sodium nitroprusside is 0.40g / L to 0.54g / L; (2) soaking, namely completely soaking quantitative immediate-speed filter paper in the solution (1), oscillating for 60 to 120 minutes on a constant-temperature oscillator; (3) molding, namely taking out the filter paper, arranging in parallel at room temperature, suspending, drying in air, cutting and sealing by plastic for later use. The test paper is simple to prepare, convenient to operate, short in color development time, high in removability and capable of being used for rapidly and accurately testing the content range of ammonia nitrogen in water.

Description

technical field [0001] The invention relates to a test paper for quickly detecting the concentration of ammonia nitrogen in a water body and an application method thereof, belonging to the field of chemical analysis. Background technique [0002] Ammonia nitrogen refers to nitrogen existing in the form of free ammonia and ammonium ions in water. Ammonia nitrogen is a nutrient in the water body, which can lead to eutrophication of the water body. It is the main oxygen-consuming pollutant in the water body. It is toxic to fish and some aquatic organisms, and may kill aquatic organisms, and may also poison drinking water organisms. die. Ammonia nitrogen in water can be converted into nitrite under certain conditions. If consumed for a long time, nitrite in water will combine with protein to form nitrosamine, which is a strong carcinogen and extremely harmful to human health. Ammonia nitrogen, as the main excessive pollutant, occurs frequently in the seven major water systems,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 袁俊生李红岩安莎莎李亚宁李鑫冉陈淼
Owner HEBEI UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com