CN117347290A - Chromaticity detection method - Google Patents
Chromaticity detection method Download PDFInfo
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- CN117347290A CN117347290A CN202311222628.1A CN202311222628A CN117347290A CN 117347290 A CN117347290 A CN 117347290A CN 202311222628 A CN202311222628 A CN 202311222628A CN 117347290 A CN117347290 A CN 117347290A
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- sample
- chromaticity
- absorbance
- detection
- spectrophotometer
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- 238000001514 detection method Methods 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000002835 absorbance Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000001228 spectrum Methods 0.000 claims abstract description 5
- 239000000725 suspension Substances 0.000 claims abstract description 4
- CLBRCZAHAHECKY-UHFFFAOYSA-N [Co].[Pt] Chemical compound [Co].[Pt] CLBRCZAHAHECKY-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009965 odorless effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004737 colorimetric analysis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001410 inorganic ion Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectrometry And Color Measurement (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
A chromaticity detection method comprises the following specific steps: s1, preparing a sample, wherein the sample is required to be processed into transparent solution or suspension before chromaticity detection; s2, measuring a sample, namely taking a certain amount of the treated sample and putting the sample into a sample cell of a spectrophotometer; s3, drawing a curve, absorbing a spectrum emitted by a spectrophotometer by utilizing water quality color (chromaticity), and drawing a standard curve by using a linear proportion principle; s4, calculating a chromaticity value, namely calculating a curve equation of absorbance versus chromaticity, and taking absorbance data obtained when detecting absorbance of a water sample to be detected into a standard curve equation to immediately calculate the chromaticity value; in addition, the color detection process does not need to be diluted for multiple times, so that the detection speed of the color of the water quality is improved, and the detection task with multiple water samples and higher frequency is more suitable.
Description
Technical Field
The invention relates to the field of water quality detection, in particular to a chromaticity detection method.
Background
The water is a colorless, odorless and odorless transparent liquid, and when certain substances (such as soluble organic matters, partial inorganic ions, colored suspended particles and the like) exist in the water, the water can be colored, namely, certain color of the water is chroma. The water quality chromaticity is an index for measuring the color of natural water or various water after treatment, and is also one of the organoleptic indexes of water. Chromaticity is one of important organoleptic indexes of drinking water, and in the water quality conventional indexes listed in GB5749-2006 sanitary standard of drinking water, the chromaticity of water (platinum cobalt chromaticity) is definitely limited and regulated, and the limit is 15 degrees (platinum cobalt chromaticity unit).
The existing national standard colorimetric detection method adopts a visual colorimetric method, namely, a water sample to be detected is diluted by a certain multiple to be compared with deionized water, and when the color of the water sample is consistent with that of the deionized water, the dilution multiple is the chromaticity of the water sample. However, the national standard method has certain deviation, and the data read by different detection people are different when the colors are judged for different detection people, so that a colorimetric detection method with high detection speed and convenient operation is needed.
Disclosure of Invention
According to the technical problems, the invention provides a chromaticity detection method which has the advantages of high detection speed and stable data.
In order to achieve the technical purpose, the method for detecting the chromaticity comprises the following specific steps:
s1, preparing a sample, wherein the sample is required to be processed into transparent solution or suspension before chromaticity detection;
s2, measuring a sample, namely taking a certain amount of the treated sample and putting the sample into a sample cell of a spectrophotometer;
s3, drawing a curve, absorbing a spectrum emitted by a spectrophotometer by utilizing water quality color (chromaticity), and drawing a standard curve by using a linear proportion principle;
s4, calculating a chromaticity value, calculating a curve equation of absorbance versus chromaticity, and carrying absorbance data obtained when detecting the absorbance of the water sample to be detected into a standard curve equation to immediately calculate the chromaticity value.
Further, the wavelength and the light intensity of the measurement can be adjusted according to the requirement by using a spectrophotometer in the step S2.
Further, in the curve equation in S4 (x is absorbance, y is chromaticity value), y= 424.48x-0.0699. The invention has the beneficial effects that:
the colorimetric detection method only needs to detect water quality by using a spectrophotometer, most of water quality laboratories have the equipment, the equipment limitation during detection is greatly reduced, and most of laboratories can finish the popularization and the like;
in the invention, the chroma detection process does not need to be diluted for many times, so that the detection speed of the water quality chroma is improved, and the method is more suitable for detection tasks with multiple water samples and higher frequency.
Drawings
FIG. 1 is a schematic diagram of a chromaticity detection method according to the present invention;
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
A chromaticity detection method comprises the following specific steps:
s1, preparing a sample, wherein the sample is required to be processed into transparent solution or suspension before chromaticity detection;
s2, measuring a sample, namely taking a certain amount of the treated sample and putting the sample into a sample cell of a spectrophotometer;
s3, drawing a curve, absorbing a spectrum emitted by a spectrophotometer by utilizing water quality color (chromaticity), and drawing a standard curve by using a linear proportion principle;
s4, calculating a chromaticity value, calculating a curve equation of absorbance versus chromaticity, and carrying absorbance data obtained when detecting the absorbance of the water sample to be detected into a standard curve equation to immediately calculate the chromaticity value.
Further, the wavelength and the light intensity of the measurement can be adjusted according to the requirement by using a spectrophotometer in the step S2.
Further, the curve equation in S4 is y= 424.48x-0.0699, where x is absorbance and y is chromaticity.
Example 2
The principle of the invention is as follows: the method comprises the steps of absorbing the spectrum emitted by a spectrophotometer by water quality color (chromaticity), generating different absorbance by different colors, enabling the absorbance to be larger as the color is darker and to be in a certain linear proportion, detecting the absorbance of different water samples with known chromaticity (chromaticity is in a linear proportion) by utilizing the principle, drawing a standard curve, listing a curve equation of absorbance versus chromaticity, and immediately calculating the chromaticity value by taking absorbance data obtained when detecting the absorbance of the water sample to be detected into the standard curve equation.
Detecting absorbance of a water sample with known chromaticity of 3,6,9,12 and 15 and pure water to obtain the absorbance of the pure water of 0.005 and the absorbance of the water sample of 0.011,0.019,0.025,0.033,0.039 respectively, subtracting the absorbance of the pure water to draw a standard curve (as shown in the above chart), and obtaining a curve equation of absorbance versus chromaticity by using an excel table, as shown in fig. 1, wherein the curve equation is: y= 424.48x-0.0699, wherein x is absorbance, y is chromaticity value, absorbance data detected by a water sample can be substituted into a standard curve after the equation is drawn out, the chromaticity value can be calculated, the detection speed of the water quality chromaticity is improved, and the detection task with multiple water samples and higher frequency is more suitable.
The detection process only needs to use a spectrophotometer, most water quality laboratories have the equipment, the equipment limit is greatly reduced, dilution is not needed for many times, the detection speed of water quality chromaticity is improved, and the detection method is more suitable for detection tasks with multiple water samples and higher frequency.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. Various components mentioned in the present invention are common in the art, and it should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications can be made in the present invention without departing from the spirit and scope of the invention, which is defined in the claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A chromaticity detection method comprises the following specific steps:
s1, preparing a sample, wherein the sample is required to be processed into transparent solution or suspension before chromaticity detection;
s2, measuring a sample, namely taking a certain amount of the treated sample and putting the sample into a sample cell of a spectrophotometer;
s3, drawing a curve, absorbing a spectrum emitted by a spectrophotometer by utilizing water quality color (chromaticity), and drawing a standard curve by using a linear proportion principle;
s4, calculating a chromaticity value, calculating a curve equation of absorbance versus chromaticity, and carrying absorbance data obtained when detecting the absorbance of the water sample to be detected into a standard curve equation to immediately calculate the chromaticity value.
2. A method of colorimetric detection as claimed in claim 1, characterized in that in S2 the wavelength and intensity of the light measured are adjusted as desired using a spectrophotometer.
3. The colorimetric detection method according to claim 1, characterized in that in S4 the equation of a curve (x is absorbance, y is colorimetric value), y= 424.48x-0.0699.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311222628.1A CN117347290A (en) | 2023-09-21 | 2023-09-21 | Chromaticity detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311222628.1A CN117347290A (en) | 2023-09-21 | 2023-09-21 | Chromaticity detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117347290A true CN117347290A (en) | 2024-01-05 |
Family
ID=89365891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311222628.1A Pending CN117347290A (en) | 2023-09-21 | 2023-09-21 | Chromaticity detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117347290A (en) |
-
2023
- 2023-09-21 CN CN202311222628.1A patent/CN117347290A/en active Pending
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