Detection reagent and rapid detection method for total nitrogen in water
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A detection reagent and detection method technology, applied in the field of analytical chemistry, to achieve the effects of high sensitivity, simple operation and convenient use
Inactive Publication Date: 2020-04-10
GUANGDONG HUANKAI MICROBIAL SCI & TECH +1
View PDF6 Cites 3 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
At present, there is no product on the market that can measure total nitrogen including inorganic and organic
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0051] The preparation method of total nitrogen detection reagent 1# in this example is as follows:
[0052] 1. Accurately fill 5mL of 5.5g / L sodium hydroxide aqueous solution into a 10mL glass colorimetric tube.
[0053] 2. Pack the potassium persulfate powder into small packages of 0.25g / bag with aluminum foil.
[0054] 3. Pack the sodium metabisulfite powder into small packages of 0.15g / bag with aluminum foil.
[0055] 4. Mix 2g of disodium chromate, 2g of sodium pyrosulfite, and 96g of anhydrous sodium sulfate powder with a grinding bowl, and then pack them into 0.15g / packages with aluminum foil.
[0056] 5. Accurately fill 8mL of concentrated sulfuric acid into a 10mL glass colorimetric tube.
Embodiment 2
[0058] The preparation method of total nitrogen detection reagent 2# of this example is as follows:
[0059] 1. Accurately fill 5mL of 5.5g / L sodium hydroxide aqueous solution into a 10mL glass colorimetric tube.
[0060] 2. Pack the potassium persulfate powder into small packages of 0.25g / bag with aluminum foil.
[0061] 3. Pack the sodium metabisulfite powder into small packages of 0.15g / bag with aluminum foil.
[0062] 4. Stir and mix 3g disodium chromate, 2g sodium metabisulfite, and 95g anhydrous sodium sulfate powder with a grinding bowl, and then pack them into 0.15g / packages with aluminum foil.
[0063] 5. Accurately fill 8mL of concentrated sulfuric acid into a 10mL glass colorimetric tube.
Embodiment 3
[0065] The preparation method of total nitrogen detection reagent 3# of this example is as follows:
[0066] 1. Accurately fill 5mL of 5.5g / L sodium hydroxide aqueous solution into a 10mL glass colorimetric tube.
[0067] 2. Pack the potassium persulfate powder into small packages of 0.25g / bag with aluminum foil.
[0068] 3. Pack the sodium metabisulfite powder into small packages of 0.15g / bag with aluminum foil.
[0069] 4. Mix 4g of disodium chromate, 2g of sodium metabisulfite, and 94g of anhydrous sodium sulfate powder with a grinding bowl, and then pack them into 0.15g / packages with aluminum foil.
[0070] 5. Accurately fill 8mL of concentrated sulfuric acid into a 10mL glass colorimetric tube.
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
Property
Measurement
Unit
concentration
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses a detection reagent and a rapid detection method for total nitrogen in water. The detection reagent comprises the following reagents: 4-6 volume parts of an alkali-containing digestion solution, 0.2-0.3 mass part of an oxidizing agent, 0.1-0.2 mass part of a reducing agent, 0.1-0.2 mass part of a color developing agent and 7-9 mass parts of an acid-containing color developing solution, wherein the color developing agent comprises disodium chromate, and the acid-containing color developing solution is concentrated sulfuric acid. The rapid detection method comprises the following steps of: 1) mixing a to-be-detected water sample with the alkali-containing digestion solution, then performing mixing with an oxidant, and carrying out digestion; and 2) mixing the digestion solution with a reducing agent, then adding the color developing agent, performing mixing, then conducting sampling, performing mixing with the acid-containing color developing solution for color developing, and determining the absorbance of the sample under a wavelength of 420nm to obtain the total nitrogen content of the to-be-detected water sample. The total nitrogen detection method disclosed by the invention is high in sensitivity, good in stability, simple and convenient to operate, economical and practical, can monitor the total nitrogen of water quality on site, and can be widely applied to rapid determination of ammonia nitrogen of various water.
Description
technical field [0001] The invention relates to the technical field of analytical chemistry, in particular to a detection reagent and a rapid detection method for water quality total nitrogen. Background technique [0002] Total nitrogen (TN) refers to the nitrogen content in soluble and suspended particles, including the sum of nitrogen in nitrite nitrogen, nitrate nitrogen, inorganic ammonium salts, dissolved ammonia and most organic nitrogen-containing compounds in water. The main sources of total nitrogen are nitrogen-containing organic matter in domestic sewage, excess nitrogen-containing fertilizers brought out of drainage after fertilization and irrigation in farmland, drainage from nitrogen-containing industries such as chemical fertilizer industry, printing and dyeing industry, and bio-fermentation industry. [0003] When the total nitrogen content in water is too high, it will cause eutrophication of water quality, overgrowth of algae, decrease of oxygen content in...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more