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Method for measuring phosphorus concentration in water body to be detected

A technology of phosphorus concentration and water body, applied in the field of occupational health testing, can solve the problems affecting the accuracy of analysis results, complicated operation procedures, arsenic interference, etc., to eliminate interference, simplify manipulation steps, and improve the effect of electrode phase.

Pending Publication Date: 2019-01-11
CHONGQING THRIVE CHEM
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Problems solved by technology

The reason is that sodium thiosulfate will precipitate sulfur, which seriously affects the accuracy of analysis results
If the arsenic content is greater than 2㎎ / L, general-purpose nitrogen is generally used to eliminate the impact, but the operation procedure of this method is extremely complicated
[0004] Therefore, those skilled in the art are committed to developing a method for measuring the concentration of phosphorus in the water to be tested, so as to solve the technical problem that the arsenic in the water to be tested interferes with the determination of the phosphorus concentration

Method used

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  • Method for measuring phosphorus concentration in water body to be detected
  • Method for measuring phosphorus concentration in water body to be detected
  • Method for measuring phosphorus concentration in water body to be detected

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the embodiments. It should be noted that in the description of the present invention, the directions indicated by the terms "upper", "lower", "left", "right", "inner" and "outer" are Or the positional relationship is based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific way , and therefore cannot be construed as a limitation of the present invention. The terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In order to solve the above technical problems, the invention provides a method for measuring the phosphorus concentrat...

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Abstract

The present invention discloses a method for measuring phosphorus concentration in a water body to be detected. The method comprises the following steps of: 1) providing a water body to be detected, adding a hydrochloric acid solution, and then performing boiling and cooling; 2) adding a nitric acid solution, and then performing heating, evaporation and cooling; 3) adding a perchloric acid solution, performing heating until the perchloric acid solution is smoking in white, and then cooling; 4) performing blow wash by employing purified water, and cooling after boiling; 5) performing dilution with water, blending and then dry filtering to obtain a filtrate; 6) adding the perchloric acid solution again; and 7) measuring the phosphorus concentration in the water body to be detected. The method for measuring phosphorus concentration in the water body to be detected can eliminate the interference of the arsenic on the measurement of the phosphorus concentration to the utmost extent so as toimprove the measurement precision of the phosphorus concentration.

Description

technical field [0001] The invention relates to a method for measuring phosphorus concentration in a water body to be tested, and belongs to the technical field of occupational health detection. Background technique [0002] In some special workplaces, the air may contain inorganic phosphorus-containing compounds, which will cause harm to human body. Therefore, it is very important to detect and monitor the concentration of inorganic phosphorus-containing compounds in the air of workplaces. Phosphorus almost always exists in the form of various phosphates, which are divided into orthophosphate, condensed phosphate (pyrophosphate, metaphosphate and polyphosphate) and organically bound phosphate, which exist in solution or in aquatic organisms middle. Phosphate content in natural water bodies is relatively small, and industrial wastewater and raw water from industries such as chemical fertilizers, smelting, and synthetic detergents often contain relatively large amounts of ph...

Claims

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Application Information

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IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 严鹏赵文华唐凌洪伟
Owner CHONGQING THRIVE CHEM
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