CN107894415A - The assay method of phosphoric acid in a kind of workplace - Google Patents
The assay method of phosphoric acid in a kind of workplace Download PDFInfo
- Publication number
- CN107894415A CN107894415A CN201711180026.9A CN201711180026A CN107894415A CN 107894415 A CN107894415 A CN 107894415A CN 201711180026 A CN201711180026 A CN 201711180026A CN 107894415 A CN107894415 A CN 107894415A
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- CN
- China
- Prior art keywords
- milliliters
- workplace
- phosphoric acid
- settled
- milliliter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Engineering & Computer Science (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The present invention provides a kind of assay method of phosphoric acid in workplace, it is characterised in that comprises the following steps：Step 1, water is added to be settled to 25 milliliters after collecting standard liquid；Step 2,0.5 milliliter of sulfuric acid solution, 0.5 milliliter of ammonium molybdate solution and 2 milliliters of sulfuric acid hydrazine solutions are sequentially added into each standard pipe, are shaken up；Step 3, add water to be settled to 50 milliliters, shake up；Step 4, heated ten minutes in boiling water bath, then take out and be cooled to room temperature.Compared with prior art, the present invention is simple to operate, reliable, greatly reduces the usage amount of ammonium molybdate, and it is more complete to develop the color, and measurement result is reliable.
Description
Technical field
The invention belongs to the chemicals fields of measurement in workplace, it is related to a kind of measure side of phosphoric acid in workplace
Method.
Background technology
Regulation adds about 10ml water after standard liquid is taken in existing analysis method, then adds 0.5ml into each standard pipe
Sulfuric acid solution, 5ml ammonium molybdate solutions and 2ml sulfuric acid hydrazine solutions, shake up；Add water to be settled to 50ml, shake up.Add in boiling water bath
Hot 10min.Taking-up is cooled to room temperature.The ammonium molybdate amount that this method adds is excessive, is not easy to develop the color.
The assay method of phosphoric acid is simple to operate, reliable in a kind of workplace, greatly reduces the usage amount of ammonium molybdate, and
And colour developing is more complete, measurement result is reliable.
The content of the invention
Technical problem solved by the invention the phosphoric acid in a kind of workplace is provided assay method, with existing measurement
The ammonium molybdate amount that is added in method is excessive, the problem of being not easy to develop the color.
In order to solve the above technical problems, in a kind of workplace of the present invention phosphoric acid assay method, it is characterised in that including
Following steps：Step 1,10 μ g/ml standard liquid 0.00ml, 0.20ml, 0.50ml, 1.00ml, 1.50ml, 2.00ml are taken respectively
In 50ml colorimetric cylinders, water is added to be settled to 25ml；Step 2,0.5 milliliter of sulfuric acid solution, 0.5 are sequentially added into each standard pipe
Milliliter ammonium molybdate solution and 2 milliliters of sulfuric acid hydrazine solutions, shake up；Step 3, add water to be settled to 50 milliliters, shake up；Step 4, boiling
Heated ten minutes in water-bath, then take out and be cooled to room temperature；Step 5：Absorbance is determined at 680nm wavelength.
Compared with prior art, the assay method of phosphoric acid is simple to operate, reliable in a kind of workplace of the present invention, drops significantly
The low usage amount of ammonium molybdate, and it is more complete to develop the color, and measurement result is reliable.
Brief description of the drawings
Fig. 1 be it is of the present invention be the assay method of phosphoric acid in a kind of workplace flow chart.
Embodiment
In present pre-ferred embodiments, the present invention provides a kind of assay method of phosphoric acid in workplace, and its feature exists
In comprising the following steps：It please participate in shown in Fig. 1, step 1, add water to be settled to 25 milliliters after collecting standard liquid；Step 2, Xiang Gebiao
0.5 milliliter of sulfuric acid solution, 0.5 milliliter of ammonium molybdate solution and 2 milliliters of sulfuric acid hydrazine solutions are sequentially added in quasi- pipe, are shaken up；Step 3,
Add water to be settled to 50 milliliters, shake up；Step 4, heated ten minutes in boiling water bath, then take out and be cooled to room temperature；Step 5：
Absorbance is determined at 680nm wavelength.The result of National Standard Method measure is 30 μ g, and the measurement result of improved method is 29.3 μ g, two kinds
The measurement result of method is in error range.
In summary, the assay method of phosphoric acid is simple to operate, reliable in a kind of workplace of the present invention, greatly reduces molybdenum
The usage amount of sour ammonium, and it is more complete to develop the color, and measurement result is reliable.
It is described above, only it is highly preferred embodiment of the present invention, any formal limitation not is made to the present invention, appoints
What those skilled in the art, without departing from the scope of the technical proposal of the invention, using in the method for the disclosure above
Appearance makes many possible changes and modifications to technical solution of the present invention, belongs to the scope of claims protection.
Claims (1)
1. the assay method of phosphoric acid in a kind of workplace, it is characterised in that comprise the following steps：Step 1, after collecting standard liquid
Water is added to be settled to 25 milliliters；Step 2,0.5 milliliter of sulfuric acid solution, 0.5 milliliter of ammonium molybdate solution are sequentially added into each standard pipe
With 2 milliliters of sulfuric acid hydrazine solutions, shake up；Step 3, add water to be settled to 50 milliliters, shake up；Step 4, heated very in boiling water bath
Clock, then take out and be cooled to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711180026.9A CN107894415A (en) | 2017-11-23 | 2017-11-23 | The assay method of phosphoric acid in a kind of workplace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711180026.9A CN107894415A (en) | 2017-11-23 | 2017-11-23 | The assay method of phosphoric acid in a kind of workplace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107894415A true CN107894415A (en) | 2018-04-10 |
Family
ID=61805926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711180026.9A Pending CN107894415A (en) | 2017-11-23 | 2017-11-23 | The assay method of phosphoric acid in a kind of workplace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107894415A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432945A (en) * | 2020-12-02 | 2021-03-02 | 安阳钢铁股份有限公司 | Method for measuring total phosphorus in circulating water |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293114A (en) * | 2012-02-22 | 2013-09-11 | 中国人民解放军海军工程大学 | Visual colorimetry for determination of phosphates |
| CN104777113A (en) * | 2015-04-09 | 2015-07-15 | 浙江正安检测技术有限公司 | Improved spectrophotometry for phosphorus pentoxide ammonium molybdate |
-
2017
- 2017-11-23 CN CN201711180026.9A patent/CN107894415A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293114A (en) * | 2012-02-22 | 2013-09-11 | 中国人民解放军海军工程大学 | Visual colorimetry for determination of phosphates |
| CN104777113A (en) * | 2015-04-09 | 2015-07-15 | 浙江正安检测技术有限公司 | Improved spectrophotometry for phosphorus pentoxide ammonium molybdate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432945A (en) * | 2020-12-02 | 2021-03-02 | 安阳钢铁股份有限公司 | Method for measuring total phosphorus in circulating water |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180410 |
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| RJ01 | Rejection of invention patent application after publication |