CN103792233A - Device and method for simultaneously detecting potassium bromate and benzoyl peroxide in wheat meal - Google Patents
Device and method for simultaneously detecting potassium bromate and benzoyl peroxide in wheat meal Download PDFInfo
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- CN103792233A CN103792233A CN201410076153.4A CN201410076153A CN103792233A CN 103792233 A CN103792233 A CN 103792233A CN 201410076153 A CN201410076153 A CN 201410076153A CN 103792233 A CN103792233 A CN 103792233A
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Abstract
The invention provides a device and method for simultaneously detecting potassium bromate and benzoyl peroxide in wheat meal. The device comprises a reflection board arranged at the inner side of the rear wall of a measurement camera obscura, color measurement standard light sources symmetrically installed at the upper side and the lower side of the front end of the measurement camera obscura, a cuvette which is arranged at the front end of the measurement camera obscura and is opposite to the reflection board and a camera located in front of the cuvette, wherein the camera is connected with a corresponding interface of a computer through a data line. The method for simultaneously detecting the potassium bromate and the benzoyl peroxide in the wheat meal comprises the steps that an acetic acid solution, a phosphoric acid solution, a starch-potassium iodide developing solution, a standard solution of the potassium bromate and the benzoyl peroxide, and a solution to be detected are prepared; after the starch-potassium iodide developing solution is added into the standard solution or the solution to be detected of the potassium bromate and the benzoyl peroxide and a color is developed, the solution is added into the cuvette, a transmitted spectrum image of the solution after color development is shot through the camera, chromaticity values R of the solution are read through the computer, the chromaticity values R of the standard solution after color development are used for drawing a standard curve, chromaticity values R of the solution to be detected are compared with the standard curve, and therefore the content of the potassium bromate and the content of the benzoyl peroxide are obtained.
Description
Technical field
The invention belongs to food additives rapid detection technical field, designed the harvester of chromophoric solution transmitted spectrum image according to optical principle, and be the principle of linear dependence, fast detecting when realizing potassium bromate in wheat flour and benzoyl peroxide according to the chromatic value of the transmitted spectrum image of solution after the colour developing of benzoyl peroxide and potassium bromate and its concentration.More specifically relate to pick-up unit and the detection method of potassium bromate and benzoyl peroxide in a kind of wheat flour.
Background technology
Potassium bromate (KBrO
3) and benzoyl peroxide (BPO) Zeng Zuowei wheat flour modifying agent and being widely used.Potassium bromate, as wheat flour treating agent, can obviously improve structure and the rheological characteristics of dough, makes bread softer, and benzoyl peroxide adds in wheat flour, not only can make wheat flour bleaching, but also have corrosion-resistant effect.But because the long-term edible wheat flour containing potassium bromate and benzoyl peroxide can produce adverse influence to human body, China is respectively within 2005 and 2011, having forbidden potassium bromate and benzoyl peroxide as wheat flour treating agent.At present, in wheat flour, the detection method of potassium bromate mainly contains: oxidimetry, vapor-phase chromatography, liquid phase chromatography, the chromatography of ions, spectrophotometric method, wherein the chromatography of ions is GB recommend method.The detection method of benzoyl peroxide mainly contains: iodimetric titration, vapor-phase chromatography, liquid phase chromatography, chemoluminescence method, biology sensor method, spectrophotometric method etc., GB recommend method is liquid phase chromatography.Said method all can only be measured a kind of adjuvant in potassium bromate and benzoyl peroxide, and the method complicated operation having, instrument costliness, cannot realize on-the-spot rapid screening.In the wheat flour of having reported, the method for measuring simultaneously of potassium bromate and benzoyl peroxide only has the chromatography of ions, but ion chromatograph is expensive, and laboratories is difficult to popularize, and more can not realize Site Detection.The principle of this research and utilization potassium bromate and benzoyl peroxide and the colour developing of starch-kalium iodide nitrite ion, by according to the harvester of the chromophoric solution transmitted spectrum image of optical principle design, and be the principle of linear dependence, fast detecting when realizing potassium bromate in wheat flour and benzoyl peroxide according to the colourity R value of transmitted spectrum image and nitrite ion concentration.
Summary of the invention
Object of the present invention is pick-up unit for potassium bromate and benzoyl peroxide are provided in a kind of wheat flour easy, that cost is low when just, and the Simultaneous Detection of potassium bromate and benzoyl peroxide in a kind of wheat flour is fast and accurately provided.
The object of the invention is to realize by following technique measures:
In wheat flour of the present invention, pick-up unit comprises measurement camera bellows when potassium bromate and benzoyl peroxide, be arranged on the reflecting plate that reflects uniform directional light of measuring camera bellows rear wall inner side, symmetry is arranged on the colour examining standard sources of the employing CIE regulation of measuring the upper and lower both sides of camera bellows front end, be arranged on the cuvette of using chromophoric solution for holding mensuration of measuring camera bellows front end in the mode relative with reflecting plate, and being positioned at the camera in cuvette front, described camera is connected with computing machine the corresponding interface of built-in image processing software by data line; Described detection built-in computer image processing software, image processing software can be write by LabVIEW, MATLAB, also can use and there is the softwares such as the photoshop of image processing function, in the time filling potassium bromate and the rear solution of benzoyl peroxide colour developing in cuvette, the transmitted spectrum image of solution after the colour developing of absorbing by camera, and be transferred in computing machine by data line, image processing software in computing machine can carry out noise reduction process to the transmitted spectrum image collecting, and reads the image chroma R value after noise reduction.
The center section that cuvette described in the present invention is placed in the face that reflective blank is relative adopts arc design, can prevent that like this light that light source sends from shining directly in cuvette, guarantees to see through the light directional light for reflecting through reflective blank entirely of cuvette.Cuvette is installed two in the middle of arc, is respectively used to the mensuration of potassium bromate and benzoyl peroxide, also can be as the parallel experiment of single mensuration.
Described camera is USB standard, supports USB standard 2.0 and 3.0, and according to langbobier law, the true colors of solution should be the color of transmitted spectrum, so camera is installed in the middle of camera bellows outer arcuate, relatively with two cuvettes respectively installs one; Video camera is connected by the corresponding port of data line and computing machine.
Detection method of the present invention comprises the following steps:
The preparation of (1) 10 ug/mL potassium bromate and benzoyl peroxide titer:
After accurately taking at 130 ℃ dried potassium bromate 0.1306 g redistilled water and dissolving in 100 mL volumetric flasks constant volume, then accurately pipette 1.0 mL constant volume in 100 mL volumetric flasks, now concentration is 10 ug/mL;
Accurately take 0.100 g benzoyl peroxide, get after appropriate anhydrous alcohol solution, constant volume, in 100 mL volumetric flasks, then accurately pipettes 1.0 mL constant volume in 100 mL volumetric flasks, and now concentration is 10 ug/mL;
(2) preparation of starch-kalium iodide nitrite ion:
Accurately take 1.0 g starch, after adding after 100 mL water heating to boil to dissolve completely, be cooled to room temperature, add 5g potassium iodide stirring and dissolving;
The preparation of (3) 0.1 mol/L acetic acid, phosphoric acid solution:
Prepare 0.1 mol/L acetic acid, phosphoric acid solution according to conventional method;
(4) drafting of typical curve:
The typical curve that a, potassium bromate are measured: get 11 5 mL color comparison tubes, add the potassium bromate titer of the difference amount of 0 mL-2.0 mL according to gradient, add respectively afterwards 1 mL acetic acid solution and 2 mL potassium iodide-starch coloration liquid, be settled to 5 mL with distilled water, after reacting 5 min, get in right amount in cuvette, by camera, the transmitted spectrum image transmitting of solution after the colour developing of picked-up, in computing machine, is opened to the image processing software in computing machine, after noise reduction process, read its colourity R value; Take colourity R value as ordinate, potassium bromate concentration is horizontal ordinate, production standard curve;
The typical curve that b, benzoyl peroxide are measured: get 11 5 mL color comparison tubes, add the benzoyl peroxide titer of the difference amount of 0 mL-2.0 mL according to gradient, add respectively afterwards 1.5 mL phosphoric acid solutions and 1.5 mL potassium iodide-starch coloration liquid, after reacting 5 min, get in right amount in cuvette, by camera by the transmitted spectrum image transmitting of solution after the colour developing of picked-up in computing machine, open the image processing software in computing machine, after noise reduction process, read its colourity R value; Take colourity R value as ordinate, benzoyl peroxide concentration is horizontal ordinate, production standard curve;
(5) preparation of liquid to be checked:
Get after wheat flour sample blending, accurately take two portions of 2.000g wheat flours in triangular flask, portion adds 20 mL water, and another part adds 20 mL absolute ethyl alcohols, after concussion 15 min, crosses 0.45 μ m filter membrane, and filtrate is liquid to be checked; Wherein, the filtrate of water is potassium bromate liquid to be checked, and absolute ethyl alcohol filtrate is benzoyl peroxide liquid to be checked;
(6) mensuration of potassium bromate and benzoyl peroxide:
Get each 2 mL of potassium bromate and benzoyl peroxide liquid to be checked in color comparison tube, in potassium bromate liquid to be checked, add 1 mL acetic acid solution and 2 mL starch-kalium iodide nitrite ions, benzoyl peroxide liquid to be checked adds 1.5 mL phosphoric acid solutions and 1.5 mL starch-kalium iodide nitrite ions; React after 5 min, get in right amount in two cuvettes, by camera by the transmitted spectrum image transmitting of solution after the colour developing of picked-up in computing machine, open the image processing software in computing machine, after noise reduction process, read its colourity R value, contrast with typical curve, draw the content of potassium bromate and benzoyl peroxide.
Beneficial effect of the present invention is as follows:
The present invention is directed in wheat flour common Illegal addition in potassium bromate and benzoyl peroxide two grow wheat powder, designed a kind of pick-up unit cheap, easy to carry, and method for quick based on this device.Detection speed of the present invention is fast, can detect potassium bromate and benzoyl peroxide simultaneously, can realize the field screening of wheat flour sample and the fast processing of batch samples simultaneously.
Accompanying drawing explanation
Fig. 1 is the principle assumption diagram of apparatus of the present invention.
Embodiment
The present invention is further described below in conjunction with embodiment (accompanying drawing).
According to langbobier law, the color that the surface color of the viewed solution of naked eyes is its reflectance spectrum, is not the integral color of solution.So the measurement of solution colour can not be measured the color of its reflectance spectrum, should measure the color of its transmitted spectrum.Design accordingly the harvester of solution transmitted spectrum image, and detected when utilizing the chromatic value of this device and solution transmitted spectrum to realize in wheat flour potassium bromate and benzoyl peroxide.
As shown in Figure 1, in wheat flour of the present invention, pick-up unit comprises and measures camera bellows 1 when potassium bromate and benzoyl peroxide, be arranged on the reflecting plate that reflects uniform directional light 2 of measuring camera bellows rear wall inner side, symmetry is arranged on the colour examining standard sources 3 of the employing CIE regulation of measuring the upper and lower both sides of camera bellows front end, be arranged on the cuvette 4 of using chromophoric solution for holding mensuration of measuring camera bellows front end in the mode relative with reflecting plate, and being positioned at the camera 5 in cuvette front, described camera 5 is connected with computing machine 6 the corresponding interface by data line; In the time filling potassium bromate and the rear solution of benzoyl peroxide colour developing in cuvette, the transmitted spectrum image of solution after camera acquisition colour developing, and be transferred in computing machine by data line.
More specifically, described measurement camera bellows 1 adopts light tight and the insensitive paper material of auroral poles is made; Reflecting plate 2 is the good organic material blank of diffuse reflection, and it can reflect uniform directional light; The center section that described cuvette is placed in the face that reflective blank is relative adopts arc design, can prevent that like this light that light source 3 sends from shining directly in cuvette 4, guarantees to see through the light directional light for reflecting through reflective blank entirely of cuvette.Cuvette 4 is installed two in the middle of arc, is respectively used to the mensuration of potassium bromate and benzoyl peroxide, also can be as the parallel experiment of single mensuration.
Camera 5 is USB standard, supports USB standard 2.0 and 3.0, and according to langbobier law, the true colors of solution should be the color of transmitted spectrum, so camera 5 is installed in the middle of camera bellows outer arcuate, relatively with two cuvettes respectively installs one.Camera 5 connects by usb data line and computing machine 6, the built-in image processing software of computing machine 6, in the time filling potassium bromate and the rear solution of benzoyl peroxide colour developing in cuvette, the transmitted spectrum image of solution after camera acquisition colour developing, and be transferred in computing machine by data line, by the image processing software in computing machine, can carry out noise reduction process to the transmitted spectrum image collecting, and read the chromatic value after noise reduction, image processing software can be write by LabVIEW, MATLAB, also can use photoshop etc. to have the software of image processing function.
Detection method of the present invention comprises the following steps:
The preparation of (1) 10 ug/mL potassium bromate and benzoyl peroxide titer:
After accurately taking at 130 ℃ dried potassium bromate 0.1306 g redistilled water and dissolving in 100 mL volumetric flasks constant volume, then accurately pipette 1.0 mL constant volume in 100 mL volumetric flasks, now concentration is 10 ug/mL.
Accurately take 0.1000 g benzoyl peroxide, get after appropriate anhydrous alcohol solution, constant volume, in 100 mL volumetric flasks, then accurately pipettes 1.0 mL constant volume in 100 mL volumetric flasks, and now concentration is 10 ug/mL.
(2) preparation of starch-kalium iodide nitrite ion:
Accurately take 1.0 g starch, add 100 mL water heating to boil after dissolving completely, be cooled to room temperature, add 5g potassium iodide stirring and dissolving, be cooled to room temperature, make starch-kalium iodide nitrite ion.
The preparation of (3) 0.1 mol/L acetic acid, phosphoric acid solution:
Prepare 0.1 mol/L acetic acid, phosphoric acid solution according to conventional method.
(4) typical curve that potassium bromate is measured:
Get 11 5 mL color comparison tubes, add respectively 0 mL according to gradient, 0.2 mL, 0.4 mL, 0.6 mL, 0. 8 mL, 1.0 mL, 1.2 mL, 1.4 mL, 1.6 mL, 1.8 mL, the potassium bromate titer of 2.0 mL, add respectively afterwards 1 mL acetic acid solution and 2 mL starch-kalium iodide nitrite ions, be settled to 5mL with distilled water, react 5 min, then get in right amount in cuvette, the transmitted spectrum image of solution after the colour developing of absorbing by camera, and be transferred in computing machine by data line, open the image processing software in computing machine, after noise reduction process, read its colourity R value, take colourity R value as ordinate, potassium bromate concentration is horizontal ordinate, production standard curve.
(5) typical curve that benzoyl peroxide is measured
Get 11 5 mL color comparison tubes, add respectively the benzoyl peroxide titer of 0 mL, 0.2 mL, 0.4 mL, 0.6 mL, 0. 8 mL, 1.0 mL, 1.2 mL, 1.4 mL, 1.6 mL, 1.8 mL, 2.0 mL according to gradient, add respectively afterwards 1 .5 mL phosphoric acid solution and 1.5 mL starch-kalium iodide nitrite ions, be settled to 5 mL with distilled water, reaction 5 min.Then get in right amount in cuvette, the transmitted spectrum image of solution after the colour developing of absorbing by camera, and be transferred in computing machine by data line, open the image processing software in computing machine, after noise reduction process, read its colourity R value; Take colourity R value as ordinate, benzoyl peroxide concentration is horizontal ordinate, production standard curve.
Utilize the above-mentioned typical curve of making, the step that potassium bromate in wheat flour and benzoyl peroxide are detected is simultaneously:
(1) preparation of starch-kalium iodide nitrite ion
Accurately take 1.0 g starch, after adding after 100 mL water heating to boil to dissolve completely, be cooled to room temperature, add 5g potassium iodide stirring and dissolving, be cooled to room temperature, make starch-kalium iodide nitrite ion.
The preparation of (2) 0.1 mol/L acetic acid, phosphoric acid solution
Prepare 0.1 mol/L acetic acid, phosphoric acid solution according to conventional method.
(3) preparation of liquid to be checked
Get after wheat flour sample blending, accurately take two portions of 2.000g wheat flours in triangular flask, portion adds 20 mL water, and another part adds 20 mL absolute ethyl alcohols, after concussion 15 min, crosses 0.45 μ m filter membrane, and filtrate is liquid to be checked.Wherein, the filtrate of water is potassium bromate liquid to be checked, and absolute ethyl alcohol filtrate is benzoyl peroxide liquid to be checked.
(4) mensuration of potassium bromate and benzoyl peroxide in wheat flour
Get 2 mL potassium bromates and benzoyl peroxide liquid to be checked respectively in two 5 mL color comparison tubes, in potassium bromate liquid to be checked, add 1 mL acetic acid and 2 mL starch-kalium iodide nitrite ions, in benzoyl peroxide liquid to be checked, add phosphoric acid and the 1.5 mL starch-kalium iodide nitrite ions of 1.5 mL, two color comparison tubes react after 5 min, get in right amount in cuvette, the transmitted spectrum image of solution after the colour developing of absorbing by camera, and be transferred in computing machine by data line, open the image processing software in computing machine, after noise reduction process, read its colourity R value, contrast with typical curve, draw the content of potassium bromate and benzoyl peroxide.
In order to verify the effect of pick-up unit of the present invention and detection method, inventor adopts pick-up unit and detection method in embodiment 1 to carry out test experience to potassium bromate in wheat flour and benzoyl peroxide, and result is as follows:
1. interference experiment
Experimental apparatus adopts experimental provision of the present invention, and experimental technique adopts detection method of the present invention.
Experimental result:
Under the condition of selecting, the impact of experiment common interference material on potassium bromate and benzoyl peroxide measurement result.Under the condition of relative error < 5%, be the potassium bromate of 0.1 mg/L for concentration, the concurrent of permission is: 500 times of glucose, Sodium Benzoate, 1000 times of K
+, Na
+, Mg
2+, Ca
2+, Zn
2+, NO
3-, SO
4 2-deng.Be the benzoyl peroxide of 0.1 mg/L for concentration, allow the material coexisting to be: 1000 times of K
+, Na
+, Cl
-, Mg
2+, Zn
2+, Cu
2+, Pb
2+, Cr
3+, NO
3 -, SO
4 2-deng.Potassium bromate and benzoyl peroxide all can be oxidized potassium iodide, but due to the water-soluble majority of organic solvent that is insoluble to of potassium bromate energy, and benzoyl peroxide can be dissolved in majority of organic solvent and water insoluble, the present invention uses water extraction to get potassium bromate, extract benzoyl peroxide with absolute ethyl alcohol, so can get rid of the phase mutual interference of the two.
Experiment conclusion: this law has stronger antijamming capability.
2. detection limit experiment
Experimental apparatus adopts experimental provision of the present invention, and experimental technique adopts detection method of the present invention.
Experimental result:
Under the condition of selecting, respectively potassium bromate and benzoyl peroxide are carried out to 11 blank determinations experiment, the standard deviation that obtains 11 blank assays is: S
kBrO3=0.199, S
bPO=0.274,3 times of typical curve concentration corresponding to standard deviation are respectively C
kBrO3=1.26 × 10
-2mg/L, C
bPO=1.84 × 10
-2mg/L.So detecting of potassium bromate is limited to 1.26 × 10
-2mg/L, detecting of benzoyl peroxide is limited to 1.84 × 10
-2mg/L.
Experiment conclusion: the present invention has lower detection limit.
3. recovery testu and Precision Experiment
Experimental apparatus adopts experimental provision of the present invention, and experimental technique adopts detection method of the present invention.
Experimental result:
Under the condition of selecting, to potassium bromate (KBrO
3) and benzoyl peroxide (BPO) carry out recovery testu, each experimental group average measurement 11 times.
Table 1 mark-on reclaims measurement result (n=11)
Experiment conclusion:
From experimental group 1-3 in table 1 and experimental group 4-6: in the time of individualism potassium bromate in wheat flour or benzoyl peroxide, the recovery of potassium bromate is 99.03%-101.17%, and RSD is 1.14%-2.01%.The recovery of benzoyl peroxide is 96.53%-102.23%, and RSD is 1.63%-2.12%.From experimental group 7-9, in the time that potassium bromate and benzoyl peroxide exist simultaneously, the recovery of potassium bromate is 98.9%-101.08%, and RSD is 1.05%-1.78%.The recovery of benzoyl peroxide is 97.78%-98.42%, and RSD is 1.26%-2.01%.Contrasted by experimental group 7-9 and experimental group 1-6, illustrate simultaneously in the time that potassium bromate and benzoyl peroxide exist, measurement result be there is no to impact.Visible the present invention has the higher recovery and higher reappearance, and detects when can realizing potassium bromate and benzoyl peroxide.
Claims (4)
1. pick-up unit when potassium bromate and benzoyl peroxide in a wheat flour, it is characterized in that: described pick-up unit comprises measurement camera bellows, be arranged on the reflecting plate that reflects uniform directional light of measuring camera bellows rear wall inner side, symmetry is arranged on the colour examining standard sources of the employing CIE regulation of measuring the upper and lower both sides of camera bellows front end, be arranged on the cuvette of using chromophoric solution for holding mensuration of measuring camera bellows front end in the mode relative with reflecting plate, and be positioned at the camera in cuvette front, described camera is connected with computing machine the corresponding interface of built-in image processing software by data line.
2. pick-up unit when potassium bromate and benzoyl peroxide in wheat flour according to claim 1, it is characterized in that: the center section that described cuvette is placed in the face that reflective blank is relative adopts arc design, cuvette is installed two in the middle of arc, be respectively used to the mensuration of potassium bromate and benzoyl peroxide, also can be used for the parallel laboratory test of single mensuration.
3. pick-up unit when potassium bromate and benzoyl peroxide in wheat flour according to claim 1, it is characterized in that: described camera is USB standard, support USB standard 2.0 and 3.0, camera is installed in the middle of camera bellows outer arcuate, relatively with two cuvettes respectively respectively installs one.
4. a method of utilizing pick-up unit described in claim 1 simultaneously potassium bromate in wheat flour and benzoyl peroxide to be detected, is characterized in that: said method comprising the steps of:
The preparation of (1) 10 μ g/mL potassium bromate and benzoyl peroxide titer:
After accurately taking at 130 ℃ dried potassium bromate 0.1306 g redistilled water and dissolving in 100 mL volumetric flasks constant volume, then accurately pipette 1.0 mL constant volume in 100 mL volumetric flasks, now concentration is 10 μ g/mL;
Accurately take 0.100 g benzoyl peroxide, get after appropriate anhydrous alcohol solution, constant volume, in 100 mL volumetric flasks, then accurately pipettes 1.0 mL constant volume in 100 mL volumetric flasks, and now concentration is 10 μ g/mL;
(2) preparation of starch-kalium iodide nitrite ion:
Accurately take 1.0 g starch, after adding after 100 mL water heating to boil to dissolve completely, be cooled to room temperature, add 5g potassium iodide stirring and dissolving;
The preparation of (3) 0.1 mol/L acetic acid, phosphoric acid solution:
Prepare 0.1 mol/L acetic acid, phosphoric acid solution according to conventional method;
(4) making of typical curve
The typical curve that a, potassium bromate are measured: get 11 5 mL color comparison tubes, add the potassium bromate titer of the difference amount of 0 mL-2.0 mL according to gradient, add respectively afterwards 1 mL acetic acid solution and 2 mL starch-kalium iodide nitrite ions, be settled to 5 mL with distilled water, after reacting 5 min, get in right amount in cuvette, by camera, the transmitted spectrum image transmitting of solution after the colour developing of picked-up, in computing machine, is opened to the image processing software in computing machine, after noise reduction process, read its colourity R value; Take colourity R value as ordinate, potassium bromate concentration is horizontal ordinate, production standard curve;
B, the typical curve that benzoyl peroxide is measured: get 11 5 mL color comparison tubes, add the benzoyl peroxide titer of the difference amount of 0 mL-2.0 mL according to gradient, add respectively afterwards 1.5 mL phosphoric acid solutions and 1.5 mL potassium iodide-starch coloration liquid, be settled to 5 mL with distilled water, after reacting 5 min, get in right amount in cuvette, by camera by the transmitted spectrum image transmitting of solution after the colour developing of picked-up in computing machine, open the image processing software in computing machine, after noise reduction process, read its colourity R value, take colourity R value as ordinate, benzoyl peroxide concentration is horizontal ordinate, production standard curve,
(5) preparation of liquid to be checked:
Get after wheat flour sample blending, accurately take two portions of 2.000g wheat flours in triangular flask, portion adds 20 mL water, and another part adds 20 mL absolute ethyl alcohols, after concussion 15 min, crosses 0.45 μ m filter membrane, and filtrate is liquid to be checked; Wherein, the filtrate of water is potassium bromate liquid to be checked, and absolute ethyl alcohol filtrate is benzoyl peroxide liquid to be checked;
(6) mensuration of potassium bromate and benzoyl peroxide:
Get each 2 mL of potassium bromate and benzoyl peroxide liquid to be checked in color comparison tube, in potassium bromate liquid to be checked, add 1 mL acetic acid solution and 2 mL starch-kalium iodide nitrite ions, benzoyl peroxide liquid to be checked adds 1.5 mL phosphoric acid solutions and 1.5 mL starch-kalium iodide nitrite ions; React after 5 min, get in right amount in two cuvettes, by camera by the transmitted spectrum image transmitting of solution after the colour developing of picked-up in computing machine, open the image processing software in computing machine, after noise reduction process, read its colourity R value, and contrast with typical curve, draw the content of potassium bromate and benzoyl peroxide.
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| CN111007060A (en) * | 2019-12-24 | 2020-04-14 | 姜金仲 | Low-temperature refining-free process tea seed oil identification method and device |
| CN112284855A (en) * | 2020-11-02 | 2021-01-29 | 盘锦宁泰能源科技有限公司 | Method for measuring oil content of oil field sludge |
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| CN108802021A (en) * | 2018-04-13 | 2018-11-13 | 北京普赞生物技术有限公司 | A kind of benzoyl peroxide Test paper and preparation method thereof and detection method |
| CN108802021B (en) * | 2018-04-13 | 2020-08-04 | 北京普赞生物技术有限公司 | Benzoyl peroxide detection test paper and preparation method and detection method thereof |
| CN111007060A (en) * | 2019-12-24 | 2020-04-14 | 姜金仲 | Low-temperature refining-free process tea seed oil identification method and device |
| CN112284855A (en) * | 2020-11-02 | 2021-01-29 | 盘锦宁泰能源科技有限公司 | Method for measuring oil content of oil field sludge |
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