A method of measuring the total nitrogen in water
A technology for measuring water and water samples, applied in the field of chemical analysis, can solve the problems of long time-consuming determination and achieve high accuracy, short time-consuming, simple and fast method
Inactive Publication Date: 2015-05-06
大连大公检验检测有限公司
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Problems solved by technology
[0005] The invention provides a convenient and fast method for measuring total nitrogen in water, which solves the time-consuming defect in the prior art
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0017] A method for measuring total nitrogen in water, said method comprising the steps of:
[0018] ① Filter the wastewater sample;
[0019] ②Add hydrofluoric acid to the solution obtained in step ① for digestion, the digestion temperature is 200°C, and the digestion time is 0.5h;
[0020] ③Use the solution obtained in step ② to detect the total nitrogen content by an ultraviolet spectrophotometer.
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The invention relates to a method of measuring the total nitrogen in water, and belongs to the field of chemical analysis. The method comprises following steps of: 1) removing solid impurities from a water sample, 2) adding hydrofluoric acid into the solution obtained in the step 1) and digesting; and 3) measuring the total nitrogen content of the solution obtained in the step 2) by an ultraviolet spectrophotometer. The beneficial effect of the method is that the method is simple, rapid and convenient.
Description
technical field [0001] The invention relates to a method for measuring total nitrogen in water, which belongs to the field of chemical analysis. Background technique [0002] Total nitrogen is defined as the total amount of all forms of inorganic and organic nitrogen in water. including NO 3 - , NO 2 - and NH 4 + Such as inorganic nitrogen and organic nitrogen such as protein, amino acid and organic amine, calculated in milligrams of nitrogen per liter of water. It is often used to indicate the degree of water pollution by nutrients. [0003] The total nitrogen content in water is one of the important indicators to measure water quality. Its determination is helpful to evaluate the pollution and self-purification status of water bodies. When the nitrogen and phosphorus substances in the surface water exceed the standard, the microorganisms will multiply, the plankton will grow vigorously, and the state of eutrophication will appear. [0004] Total nitrogen is the g...
Claims
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Inventor 关杰关宇江美玲曹卉王清
Owner 大连大公检验检测有限公司