CN113834797A - Method for detecting trace selenium element in cereal food based on light field and magnetic field - Google Patents
Method for detecting trace selenium element in cereal food based on light field and magnetic field Download PDFInfo
- Publication number
- CN113834797A CN113834797A CN202111428963.8A CN202111428963A CN113834797A CN 113834797 A CN113834797 A CN 113834797A CN 202111428963 A CN202111428963 A CN 202111428963A CN 113834797 A CN113834797 A CN 113834797A
- Authority
- CN
- China
- Prior art keywords
- film sample
- visible light
- cereal food
- magnetic field
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
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
- G01N21/59—Transmissivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
Landscapes
- Physics & Mathematics (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)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a method for detecting trace selenium in cereal food based on an optical field and a magnetic field. The method comprises the steps of pretreating cereal food to prepare slurry, then carrying out film extension to form a film, then placing an obtained film sample in a specific constant magnetic field, simultaneously detecting the absolute value of the light intensity difference of visible light before and after the visible light penetrates through the film sample, and then obtaining the selenium content in the cereal food according to the predetermined relationship between the selenium content in the cereal food and the absolute value of the light intensity difference of the visible light before and after the visible light penetrates through the corresponding film sample. The detection method provided by the invention does not need to carry out complex pretreatment on the sample, does not need complex equipment, is simple to operate, short in detection period and good in accuracy, can meet the requirements of simple and rapid detection, and has wide application prospect.
Description
Technical Field
The invention relates to a method for detecting the content of selenium in cereal food, in particular to a method for detecting trace selenium in cereal food based on an optical field and a magnetic field, and belongs to the technical field of photoelectric detection.
Background
Selenium is an important essential trace element, and the selenium deficiency can cause oxidative stress related diseases, and the immunity and the fertility are reduced, thereby being harmful to the health of people. Selenium fortified crops are a good way of dietary selenium intake. The selenium content in the grains is generally improved by selenium-rich variety cultivation, selenium-rich planting, selenium nutrition enhancer addition and the like. However, if the grains with excessive selenium are eaten for a long time, selenium poisoning can be caused, and the problems of blindness, abdominal pain, cardiac atrophy and liver cirrhosis and the like can be caused, thereby seriously harming the health of people. The selenium content of the selenium-rich rice is regulated to be 0.04-0.30 mg/kg in GB 22499-. Therefore, the control of the selenium content is particularly critical when the grain is rich in selenium. At present, selenium detection methods mainly include a chemical method, a hydride atomic fluorescence spectrometry, a fluorescence spectrophotometry, an inductively coupled plasma mass spectrometry and the like, for example, CN103884785B, CN102928500A and the like can be referred to, but these methods all require relatively complicated pretreatment of a sample, the detection period is long, and the equipment use and maintenance cost is high.
Disclosure of Invention
The invention mainly aims to provide a method for detecting trace selenium element in cereal food based on an optical field and a magnetic field, so as to overcome the defects in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:
a method for detecting trace selenium in cereal food based on an optical field and a magnetic field is characterized by comprising the following steps:
(1) crushing cereal food to be detected, and mixing the cereal food with deionized water to prepare slurry;
(2) carrying out vacuum defoaming on the slurry, and then carrying out flow extension film forming at room temperature to obtain a film sample;
(3) solidifying the film sample in a constant temperature and humidity environment, then applying a constant magnetic field with specific strength to the film sample at room temperature, wherein the magnetic field direction of the constant magnetic field is parallel to the length or width direction of the film sample, irradiating one side surface of the film sample with visible light, and detecting the absolute value delta of the light intensity difference of the visible light before and after the visible light penetrates through the film samplex c Then according to Δx c And a predetermined selenium content in the cerealYAbsolute value delta of light intensity difference between visible light before and after transmitting through corresponding film samplexIs a relational expression ofY=6.58×10-5Δx+ M, the value of M being 8.23X 10-3~8.69×10-3And calculating the selenium content in the cereal food to be detected.
Compared with the prior art, the detection method provided by the invention does not need to carry out complex pretreatment on the cereal food sample, does not need complex and expensive equipment, is easy to operate, efficient, convenient, short in detection time and high in accuracy, and can well meet the requirements of simple and rapid detection.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a method for detecting trace selenium in cereal based food based on optical and magnetic fields according to an exemplary embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The invention provides a method for detecting trace selenium element in cereal food based on optical field and magnetic field, which comprises the steps of sample preparation, detection, analysis and the like, and the principle of the method mainly lies in that: the selenium element can generate induction orientation in a complex electrolyte system under a constant radial magnetic field with specific strength, namely an induction magnetic field is generated in the selenium compound, and then the specific absorption is caused to visible light.
In some embodiments of the invention, a method for detecting trace selenium in cereal food based on optical and magnetic fields comprises:
(1) crushing cereal food to be detected, and mixing the cereal food with deionized water to prepare slurry;
(2) carrying out vacuum defoaming on the slurry, and then carrying out flow extension film forming at room temperature to obtain a film sample;
(3) solidifying the film sample in a constant temperature and humidity environment, then applying a constant magnetic field with specific strength to the film sample at room temperature, wherein the magnetic field direction of the constant magnetic field is parallel to the length or width direction of the film sample, irradiating one side surface of the film sample with visible light, and detecting the absolute value delta of the light intensity difference of the visible light before and after the visible light penetrates through the film samplex c Then according to Δx c And a predetermined valleySelenium content in foodYAbsolute value delta of light intensity difference between visible light before and after transmitting through corresponding film samplexIs a relational expression ofY=6.58×10-5Δx+ M, the value of M being 8.23X 10-3~8.69×10-3And calculating the selenium content in the cereal food to be detected.
Further, the method further comprises the following steps: processing a series of cereal food samples with different selenium content by the operations of the steps (1) to (3) so as to determine the selenium content in the cereal foodYAbsolute value delta of difference between light intensities before and after visible light penetrates through corresponding film samplexThe detection range corresponding to the relational expression is 0-0.40 mg/kg.
In order to ensure the detection accuracy, the grain food standard samples and the grain food to be detected are mixed with deionized water according to the same mass ratio, and film samples with the same thickness are prepared. The applied excitation signal voltage, the constant magnetic field and the visible light illumination intensity for the film samples are also consistent.
In some embodiments, step (1) comprises: mixing the crushed cereal food to be detected with deionized water according to the mass ratio of 1:2.5-1:5, fully stirring until complete gelatinization, pulping, and homogenizing under high pressure to obtain the slurry.
In some embodiments, step (1) comprises: grinding cereal food to be detected, drying, pulverizing, mixing with deionized water, and stirring at 80-90 deg.C to completely gelatinize.
In some embodiments, step (2) comprises: and (3) carrying out vacuum defoaming treatment on the slurry for 30-40 min under the vacuum condition of 0.2-0.6 MPa.
In some embodiments, step (2) comprises: pouring the slurry after vacuum defoaming into a transparent flat plate with a groove, performing casting film formation at room temperature, and standing for 30-40 min to obtain a film sample.
In some embodiments, the film sample has a thickness of 0.2 to 1.0 mm.
In some embodiments, step (3) comprises: and solidifying the film sample for 30-40 min in a constant-temperature and constant-humidity environment with the temperature of 50-60 ℃ and the relative humidity of RH% = 65-85.
In some embodiments, step (3) comprises: transferring the film sample after film fixing to a room temperature environment, then applying a constant stable magnetic field to the film sample, wherein the intensity of the constant stable magnetic field is 30-50mT, and irradiating one side surface of the film sample with visible light.
In some embodiments, the visible light intensity irradiated on one side surface of the thin film sample is 1000-.
In some embodiments, step (3) comprises: and a light source and a light intensity detection device for emitting the visible light are respectively arranged on two sides of the film sample, wherein the distance between the light emitting surface of the light source and the surface of the film sample and the distance between the light receiving surface of the light intensity detection device and the surface of the film sample are both within 10 mm.
In a more specific embodiment of the invention, a method for detecting trace selenium in cereal food based on light field and magnetic field can comprise the following steps:
i. grinding cereal food, oven drying at 80-110 deg.C (preferably 105 deg.C for 3 hr), pulverizing, adding 2.5-5 times of deionized water, stirring at 85-95 deg.C (preferably 90 deg.C water bath) for completely gelatinizing, pulping, and homogenizing under high pressure to obtain pulp.
ii. Defoaming the slurry under the vacuum condition at 0.2-0.6 MPa for 30-40 min, pouring the slurry into a transparent flat plate (such as a quartz glass flat plate) with a groove, wherein the length and width of the groove are 100mm multiplied by 100mm or more and the groove depth is 2mm or more, performing flow-casting film formation at room temperature (such as 25 ℃) and the film thickness is 0.2-1.0 mm, and standing for 30-40 min to obtain a film sample.
iii, placing the transparent flat plate carrying the film sample in a constant temperature and humidity environment, adjusting the relative humidity RH% = 65-85, fixing the film for 30-40 min, setting the temperature at 50-60 ℃, then transferring the transparent flat plate carrying the film sample to a room temperature (such as 25 ℃) environment, referring to the figure 1, placing a magnetic field generator on the left side or the right side or the front side and the back side of the film sample, and applying a radial of 30-50mTA constant magnetic field, a light source arranged at a position 10mm above the film sample for emitting visible light with light intensity of 1000-5000Lx, a light intensity detection device arranged at a position 10mm below the film sample for detecting the transmitted light intensity, and an absolute value delta of the light intensity difference before and after the visible light transmits the film sample is calculatedx. Wherein the light source may be an LED lamp, a tungsten lamp, an iodine lamp, etc. without being limited thereto. The light intensity detecting device may be an illumination intensity measuring instrument or the like, and is not limited thereto.
iv, modeling by collecting data to obtain the content of selenium element in the sampleYAnd the absolute value delta of the difference between the light intensities before and after the visible light is transmitted through the film samplexIs a relational expression ofY=6.58×10-5Δx+ M, where M is a constant whose value is 8.23X 10 depending on the type of cereal-3-8.69×10-3The detection range is 0-0.40 mg/kg.
The technical solution of the present invention will be explained in more detail with reference to several embodiments as follows.
Embodiment 1 a method for detecting the content of trace selenium in rice cakes based on an optical field and a magnetic field comprises the following steps:
i. grinding rice cake, drying at 105 deg.C for 3 hr, pulverizing, adding into deionized water to make the mass ratio of rice cake and water be 1:2.5, stirring in 90 deg.C water bath to completely gelatinize, pulping, and homogenizing under high pressure to obtain slurry.
ii. Defoaming the slurry under the vacuum condition at 0.2MPa for 30min, pouring the slurry into a quartz glass flat plate with a groove, wherein the length, width and depth of the groove are 100mm multiplied by 2mm, carrying out flow-casting film formation at room temperature, the film thickness is 0.8mm, and standing for 40min to obtain a film sample.
iii, putting the quartz glass flat plate carrying the film sample into a constant temperature and humidity environment, adjusting the relative humidity RH% =65, fixing the film for 40min, setting the temperature to 55 ℃, then transferring the transparent flat plate carrying the film sample to a room temperature (such as 25 ℃) environment, referring to the figure 1, placing a magnetic field generator at the left side and the right side of the film sample, applying a radial constant magnetic field of 30mT, arranging a light source at a position 10mm above the film sample to emit visible light with the light intensity of 1000Lx, and meanwhile, arranging a light source at the position 10mm above the film sampleA light intensity detection device is arranged at a position 10mm below the film sample to detect the intensity of the transmitted visible light, and then the absolute value delta of the light intensity difference between the front and the back of the visible light transmitted through the film sample is calculatedx。
Taking a series of rice cakes with known and different selenium contents as standard samples, detecting the standard samples according to the operation of the steps i-iii, and modeling by collecting obtained data to obtain the selenium content in the standard samplesYAnd the absolute value delta of the difference between the light intensities before and after the visible light transmits through the corresponding film samplexIs a relational expression ofY=6.58×10-5Δx+8.23×10-3The detection range is 0-0.40 mg/kg.
And then, detecting the rice cakes to be detected with unknown selenium content according to the operation of the steps i-iii to obtain the absolute value delta of the corresponding light intensity difference valuex c According to ax c And calculating to obtain the selenium content in the rice cake to be detected according to the relational expression.
The method of the embodiment and the method of GB 5009.93-2017 are respectively adopted to detect 7 rice cakes sold by different merchants, and the results are shown in the following table 1, which fully illustrates the accuracy of the method of the embodiment.
TABLE 1
Embodiment 2 a method for detecting the content of trace selenium in rice noodles based on an optical field and a magnetic field, comprising the following steps:
s1, grinding the rice noodles, drying for 3h at 110 ℃, crushing, adding the rice noodles into deionized water to enable the mass ratio of the whole wheat flour to the water to be 1:5, fully stirring in a water bath at 95 ℃ until the whole wheat flour is completely gelatinized, pulping, and homogenizing under high pressure to obtain a slurry;
s2, defoaming the slurry under the vacuum condition at 0.5MPa for 40 min;
s3, pouring the slurry into a quartz glass flat plate with a groove, wherein the length, width and depth of the groove are 100mm multiplied by 2mm, carrying out casting film formation at room temperature, and keeping the film thickness at 1.0mm for 40 min;
s4, putting a quartz glass flat plate loaded with a film sample into a constant temperature and humidity environment, adjusting the relative humidity RH% =72, fixing the film for 40min, setting the temperature at 60 ℃, referring to fig. 1, arranging a magnetic field generator at the front side and the rear side of the film sample, applying a radial constant magnetic field of 45mT, arranging a light source at a position 10mm above the film sample to emit visible light with the light intensity of 3000Lx, arranging a light intensity detection device at a position 10mm below the film sample to detect the intensity of the transmitted visible light, and calculating to obtain the absolute value delta of the light intensity difference of the visible light before and after the visible light transmits the film samplex。
A series of rice noodles with known and different selenium content are used as standard samples, the standard samples are detected according to the operation of the steps i-iii, and modeling is carried out by collecting obtained data to obtain the selenium content in the standard samplesYAnd the absolute value delta of the difference between the light intensities before and after the visible light transmits through the corresponding film samplexIs a relational expression ofY=6.58×10-5Δx+8.69×10-3The detection range is 0-0.40 mg/kg.
Then, detecting the rice noodles to be detected with unknown selenium content according to the operation of the steps i-iii to obtain the absolute value delta of the corresponding light intensity difference valuex c According to ax c And calculating to obtain the selenium content in the rice noodle to be measured according to the relational expression.
The method of the embodiment and the method of GB 5009.93-2017 are respectively used to test 10 types of rice noodles sold by different merchants, and the results are shown in table 2 below, which fully illustrates the accuracy of the method of the embodiment.
TABLE 2
Embodiment 3 a method for detecting the content of trace selenium in rice cake based on optical field and magnetic field, comprising the following steps:
s1, grinding the rice cake, drying for 3h at 80 ℃, crushing, adding the rice cake into deionized water to enable the mass ratio of the rice cake to the water to be 1:3.5, fully stirring in a water bath at 85 ℃ until the rice cake is completely gelatinized, pulping, and homogenizing under high pressure to obtain a slurry;
s2, defoaming the slurry under the vacuum condition at 0.6MPa for 40 min;
s3, pouring the slurry into a quartz glass flat plate with a groove, wherein the length, width and depth of the groove are 100mm multiplied by 2mm, carrying out casting film formation at room temperature, and keeping the film thickness at 0.2mm for 30 min;
s4, putting the quartz glass plate carrying the film sample into a constant temperature and humidity environment, adjusting the relative humidity RH% =80, fixing the film for 40min, setting the temperature at 50 ℃, referring to fig. 1, arranging a magnetic field generator at the left side and the right side of the film sample, applying a radial constant magnetic field of 50mT, arranging a light source at a position 10mm above the film sample to emit visible light with the light intensity of 5000Lx, arranging a light intensity detection device at a position 10mm below the film sample to detect the intensity of the transmitted visible light, and calculating to obtain the absolute value delta of the light intensity difference before and after the visible light transmits through the film samplex。
A series of rice cakes with known and different selenium contents are used as standard samples, the standard samples are detected according to the operation of the steps i-iii, and modeling is carried out by collecting obtained data to obtain the selenium content in the standard samplesYAnd the absolute value delta of the difference between the light intensities before and after the visible light transmits through the corresponding film samplexIs a relational expression ofY=6.58×10-5 x+8.41×10-3The detection range is 0-0.40 mg/kg.
Then, detecting the rice cake to be detected with unknown selenium content according to the operation of the steps i-iii to obtain the absolute value delta of the corresponding light intensity difference valuex c According to ax c And calculating to obtain the selenium content in the rice cake to be detected according to the relational expression.
The method of the embodiment and the method of GB 5009.93-2017 are respectively adopted to detect 12 rice cakes sold by different merchants, and the results are shown in the following table 3, which fully illustrates the accuracy of the method of the embodiment.
TABLE 3
It should be understood that the above describes only some embodiments of the present invention and that various other changes and modifications may be affected therein by one of ordinary skill in the related art without departing from the scope or spirit of the invention.
Claims (10)
1. A method for detecting trace selenium in cereal food based on an optical field and a magnetic field is characterized by comprising the following steps:
(1) crushing cereal food to be detected, and mixing the cereal food with deionized water to prepare slurry;
(2) carrying out vacuum defoaming on the slurry, and then carrying out flow extension film forming at room temperature to obtain a film sample;
(3) solidifying the film sample in a constant temperature and humidity environment, applying a constant magnetic field with the intensity of 30-50mT to the film sample at room temperature, enabling the magnetic field direction of the constant magnetic field to be parallel to the length or width direction of the film sample, irradiating one side surface of the film sample with visible light, detecting the absolute value delta xc of the light intensity difference of the visible light before and after the visible light penetrates through the film sample, and then according to the relation Y =6.58 × 10-5 delta x + M of the delta xc and the predetermined relation between the selenium content Y in the cereal food and the absolute value delta x of the light intensity difference of the visible light before and after the visible light penetrates through the corresponding film sample, wherein the value of M is 8.23 × 10-3~8.69×10-3And calculating the selenium content in the cereal food to be detected.
2. The method of claim 1, wherein step (1) comprises: mixing the crushed cereal food to be detected with deionized water according to the mass ratio of 1:2.5-1:5, fully stirring until complete gelatinization, pulping, and homogenizing under high pressure to obtain the slurry.
3. The method of claim 2, wherein step (1) comprises: grinding cereal food to be detected, drying, pulverizing, mixing with deionized water, and stirring at 80-90 deg.C to completely gelatinize.
4. The method of claim 1, wherein step (2) comprises: and (3) carrying out vacuum defoaming treatment on the slurry for 30-40 min under the vacuum condition of 0.2-0.6 MPa.
5. The method of claim 1, wherein step (2) comprises: pouring the slurry after vacuum defoaming into a transparent flat plate with a groove, performing casting film formation at room temperature, and standing for 30-40 min to obtain a film sample.
6. The method of claim 1, wherein: the thickness of the film sample is 0.2-1.0 mm.
7. The method of claim 1, wherein step (3) comprises: and solidifying the film sample for 30-40 min in a constant-temperature and constant-humidity environment with the temperature of 50-60 ℃ and the relative humidity of RH% = 65-85.
8. The method of claim 1, wherein step (3) comprises: and transferring the film sample after film fixing to a room temperature environment, then applying a constant magnetic field to the film sample, and irradiating one side surface of the film sample with visible light.
9. The method of claim 8, wherein: the visible light intensity of the surface of one side of the film sample is 1000-5000 Lx.
10. The method of claim 1, wherein step (3) comprises: and a light source and a light intensity detection device for emitting the visible light are respectively arranged on two sides of the film sample, wherein the distance between the light emitting surface of the light source and the surface of the film sample and the distance between the light receiving surface of the light intensity detection device and the surface of the film sample are both within 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111428963.8A CN113834797B (en) | 2021-11-29 | 2021-11-29 | Method for detecting trace selenium element in cereal food based on light field and magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111428963.8A CN113834797B (en) | 2021-11-29 | 2021-11-29 | Method for detecting trace selenium element in cereal food based on light field and magnetic field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113834797A true CN113834797A (en) | 2021-12-24 |
| CN113834797B CN113834797B (en) | 2022-02-15 |
Family
ID=78971870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111428963.8A Active CN113834797B (en) | 2021-11-29 | 2021-11-29 | Method for detecting trace selenium element in cereal food based on light field and magnetic field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113834797B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2744168A1 (en) * | 1976-10-01 | 1978-04-06 | Hitachi Ltd | MAGNETO-OPTICAL SPECTRAL PHOTOMETER |
| CN1563948A (en) * | 2004-04-16 | 2005-01-12 | 广东省测试分析研究所 | Method and appts. for atom absorbing analysis of constant magnetic field reverse zeeman effect |
| CN1752272A (en) * | 2005-10-21 | 2006-03-29 | 中国科学院上海光学精密机械研究所 | Preparation method of zinc oxide film with enhanced purple light emission |
| CN105021640A (en) * | 2015-06-03 | 2015-11-04 | 江苏天瑞仪器股份有限公司 | Rapid X-ray fluorescence spectrometric determination method for elemental selenium in cereals |
| CN107219182A (en) * | 2017-07-14 | 2017-09-29 | 宜昌后皇真空科技有限公司 | The particle beams excites VUV visible light wave range magneto-optic to compose method of testing and system |
| CN111537488A (en) * | 2020-06-08 | 2020-08-14 | 山西中谱能源科技有限公司 | Device and method for eliminating mercury element measurement interference by utilizing Zeeman fluorescence |
| CN111982874A (en) * | 2020-08-14 | 2020-11-24 | 奥迈检测有限公司 | Method for detecting selenium element in grains |
-
2021
- 2021-11-29 CN CN202111428963.8A patent/CN113834797B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2744168A1 (en) * | 1976-10-01 | 1978-04-06 | Hitachi Ltd | MAGNETO-OPTICAL SPECTRAL PHOTOMETER |
| US4166697A (en) * | 1976-10-01 | 1979-09-04 | Hitachi, Ltd. | Spectrophotometer employing magneto-optic effect |
| CN1563948A (en) * | 2004-04-16 | 2005-01-12 | 广东省测试分析研究所 | Method and appts. for atom absorbing analysis of constant magnetic field reverse zeeman effect |
| CN1752272A (en) * | 2005-10-21 | 2006-03-29 | 中国科学院上海光学精密机械研究所 | Preparation method of zinc oxide film with enhanced purple light emission |
| CN105021640A (en) * | 2015-06-03 | 2015-11-04 | 江苏天瑞仪器股份有限公司 | Rapid X-ray fluorescence spectrometric determination method for elemental selenium in cereals |
| CN107219182A (en) * | 2017-07-14 | 2017-09-29 | 宜昌后皇真空科技有限公司 | The particle beams excites VUV visible light wave range magneto-optic to compose method of testing and system |
| CN111537488A (en) * | 2020-06-08 | 2020-08-14 | 山西中谱能源科技有限公司 | Device and method for eliminating mercury element measurement interference by utilizing Zeeman fluorescence |
| CN111982874A (en) * | 2020-08-14 | 2020-11-24 | 奥迈检测有限公司 | Method for detecting selenium element in grains |
Non-Patent Citations (2)
| Title |
|---|
| DIANA CONSTANTINESCU-ARUXANDEI ET AL.: "Selenium Analysis and Speciation in Dietary Supplements Based on Next-Generation Selenium Ingredients", 《NUTRIENTS》 * |
| 王丽晖 等: "塞曼效应石墨炉原子吸收法测定铬镍钢中痕量砷和硒", 《兵器材料科学与工程》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113834797B (en) | 2022-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104833671B (en) | A kind of assay method of the absolute amylose content of rice | |
| CN101839849A (en) | Amylose detector and method for detecting amylose | |
| CN105954345B (en) | The electrochemical determination method of vitamin content in a kind of fruit juice | |
| CN103076456A (en) | Kit for detecting alpha 1-acidoglycoprotein by using immunity transmission turbidity method | |
| CN107141318A (en) | Contain（Aldehyde radical）The complex of iridium of phenanthroline part and the method that bisulfite is quantitatively detected with it | |
| CN106483112B (en) | A kind of method that fluorescence and colorimetric double mode continuously detect arginine and copper ion | |
| CN107607512A (en) | A kind of method of content of beary metal in AFS measure edible mushroom | |
| CN111024665A (en) | Method for measuring content of organic selenium in selenium-enriched rice or product prepared from selenium-enriched rice | |
| CN109187464A (en) | A method of quick, Accurate Determining Chinese medicine Se content | |
| CN113834797B (en) | Method for detecting trace selenium element in cereal food based on light field and magnetic field | |
| CN104515768B (en) | Tumor specific growth factor detection kit | |
| CN106083645A (en) | A kind of iron-ion fluorescent probe compound and its preparation method and application | |
| CN106770117A (en) | A kind of assay method of Selenium in Food | |
| CN104458609B (en) | Method for auxiliary determination of substitution degree of water-soluble food-grade sodium carboxymethylcellulose by microwaves | |
| CN111077201B (en) | Preparation method of photoelectrochemical aptamer sensor for monitoring zearalenone | |
| Shimp et al. | Spectrochemical analysis of soils and biological materials | |
| CN107860860B (en) | A kind of method of high performance thin layer chromatography-gas phase fluorescent derivatization Rapid Screening folic acid | |
| CN113848196B (en) | Method for detecting content of trace iron in cereal food based on photoelectric coupling method | |
| CN107247049B (en) | A kind of test paper for detecting cadmium content in cereal with screening agent | |
| Amaya-F et al. | Automated determination of tryptophan in legumes and cereals | |
| CN108752272B (en) | 8-aminoquinoline amide derivative, preparation method, application and fluorescence analysis method thereof | |
| CN106645519A (en) | HPLC (high performance liquid chromatography) determination method for content of vitamin B2 in common wheat | |
| CN201628681U (en) | Amylose starch detector | |
| CN105319182A (en) | Corn safety detection analysis meter | |
| Gao et al. | Double-ratiometric fluorescence imaging of H 2 Se and O 2˙− under hypoxia for exploring Na 2 SeO 3-induced HepG2 cells' apoptosis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 528400 floor 1, zone B, building A2, No. 6, Shennong Road, Torch Development Zone, Zhongshan City, Guangdong Province Patentee after: Licheng Testing and Certification Group Co., Ltd. Address before: 528400 floor 1, zone B, building A2, No. 6, Shennong Road, Torch Development Zone, Zhongshan City, Guangdong Province Patentee before: GUANGDONG LICHENG DETECTION TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |