CN106092945A - The online test method of bisphenol-A migration amount and detecting system in food contact material - Google Patents
The online test method of bisphenol-A migration amount and detecting system in food contact material Download PDFInfo
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- CN106092945A CN106092945A CN201610404457.8A CN201610404457A CN106092945A CN 106092945 A CN106092945 A CN 106092945A CN 201610404457 A CN201610404457 A CN 201610404457A CN 106092945 A CN106092945 A CN 106092945A
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- food
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- bisphenol
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- 235000013305 food Nutrition 0.000 title claims abstract description 96
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 239000000463 material Substances 0.000 title claims abstract description 64
- 229940106691 bisphenol a Drugs 0.000 title claims abstract description 40
- 238000013508 migration Methods 0.000 title claims abstract description 19
- 230000005012 migration Effects 0.000 title claims abstract description 19
- 238000010998 test method Methods 0.000 title claims abstract description 10
- 238000002835 absorbance Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000011088 calibration curve Methods 0.000 claims abstract description 5
- 230000031700 light absorption Effects 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims description 7
- -1 polyethylene Polymers 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 239000011358 absorbing material Substances 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 230000008033 biological extinction Effects 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 239000005304 optical glass Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 15
- 238000001514 detection method Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ZYUVGYBAPZYKSA-UHFFFAOYSA-N 5-(3-hydroxybutan-2-yl)-4-methylbenzene-1,3-diol Chemical compound CC(O)C(C)C1=CC(O)=CC(O)=C1C ZYUVGYBAPZYKSA-UHFFFAOYSA-N 0.000 description 1
- 239000004425 Makrolon Substances 0.000 description 1
- 231100000703 Maximum Residue Limit Toxicity 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- NHADDZMCASKINP-HTRCEHHLSA-N decarboxydihydrocitrinin Natural products C1=C(O)C(C)=C2[C@H](C)[C@@H](C)OCC2=C1O NHADDZMCASKINP-HTRCEHHLSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000021393 food security Nutrition 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 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
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
Landscapes
- 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)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention relates to bisphenol-A Special migration online test method in a kind of food contact material, including step: 1) bisphenol-A standard serial solution addition food contact material moving apparatus is measured light absorption value, Criterion curvilinear equation respectively；2) the aqueous-based food analogies measuring certain volume pour food contact material moving apparatus respectively into, then the food contact material cutting certain area is immersed in aqueous-based food analogies, prepare food simulants solution；3) absorbance in results of regular determination food simulants, according to step 1) in the calibration curve set up calculate the concentration of bisphenol-A in food simulants.The invention further relates to the automatic checkout system of the method according to the invention.
Description
Technical field
The invention belongs to field of food safety, specifically, the present invention relates to bisphenol-A in a kind of food contact material and migrate
The online test method of amount and detecting system thereof.
Background technology
For a long time, food-safety problem is always the hot issue that the whole world pays high attention to.Food security refers not only to food
The safety of self, also include packaged after security.Developing rapidly of material science so that polymer is as packaging material
One, has been widely applied in packaging for foodstuff.But, the additive in polymer is in the processability improving polymer and makes
While using performance, also can under certain condition from polymeric material to the food contacting migrate and contaminated food products.State
Family's mandatory standard GB9685-2008 " food containers, packaging material additive use sanitary standard " clear stipulaties food bag
The using priciple of package material additive, the additive kind allowing use, range, maximum usage amount, maximum residue limit
Or Special migration etc..
Chemical composition in food contact material is sufficiently complex, and detection method is various.For example, plasticizer, antioxidant, oligomerisation
The harmful substance such as thing, residual monomer can pass through high performance liquid chromatography, gas-chromatography, gas chromatography-mass spectrography, liquid phase look
The technological means such as spectrum-mass spectrometry detect, but various pre-treatment means are relatively complicated.Hence it is highly desirable to science is objective
See ground and evaluate the safety and sanitation performance of material, set up efficient, safety detection technology and standard method efficiently.
Increasing with food contact material species, it is especially desirable to set up and develop food continuous, online, quick
The detection device of chemical composition Special migration in contact material.In recent years, bisphenol-A is as a kind of serious harm human health
Plasticizer, its Special migration in food simulants refers to as a key in food contact material safety evaluation
Mark.Meanwhile, in food contact material, the research of the Transport of bisphenol-A needs substantial amounts of migration experimental data.
For described problem, the invention provides a kind of Special migration for detecting bisphenol-A in food contact material
Online test method and detecting system.The Special migration online test method of bisphenol-A in the food contact material of the present invention
And detecting system improves the efficiency of food contact material safety evaluation, fill up domestic food contact material and migrated experiment online
The blank of automatic analytical instrument.
Content of the invention
The present invention relates to online test method and the detecting system thereof of bisphenol-A migration amount in a kind of food contact material, logical
Cross the change of absorbance of solution in monitoring food contact material moving apparatus, in on-line checking food contact material bisphenol-A to
Migration situation in food simulants.
The principle of the detection method of the present invention is: set up the calibration curve of bisphenol-A in certain food analogies solution, at this
Food simulants solution carries out food contact material and migrates experiment, and measure the light absorption value in food simulants solution, utilize
Langbobier law calculates the concentration of bisphenol-A in food simulants solution.Bisphenol-A is in the suction that wavelength is that 278 nanometers have maximum
Luminosity.
In a kind of food contact material, the online test method of bisphenol-A Special migration, comprises the steps:
1) bisphenol-A standard serial solution addition food contact material moving apparatus is measured light absorption value, Criterion respectively
Curvilinear equation (1):
A=(K b) C+a (1)
Wherein, A is absorbance；K is molar absorption coefficient, relevant with the wavelength of the character of absorbing material and incident light；C is
The concentration of extinction material；B is absorber thickness；A is deviation constant；
2) the aqueous-based food analogies measuring certain volume pour food contact material moving apparatus respectively into, then cut certain
The food contact material of area is immersed in aqueous-based food analogies, prepares food simulants solution；Wherein food contact material
Area be 0.6cm with the ratio of the volume of aqueous-based food analogies2/ml；
3) as required, the absorbance in results of regular determination food simulants at a certain time interval, then utilizes and records
This absorbance, according to previous step 1) in calibration curve equation (1) be calculated the concentration of bisphenol-A in food simulants.
In step 2) in, the preparation of described food simulants solution and experiment condition are according to GB/T 23296.1-2009
" in food contact plastics plastics, in restricted substances, material is tested and content assaying method to food and food simulants specific transfer
And food simulants exposure condition selects guide ": aqueous-based food analogies are respectively analogies A: water；Analogies B: quality is divided
Number is the acetic acid aqueous solution of 3%；Analogies C: volume fraction is the ethanol water of 10%；Bisphenol-A, analyzes pure；Experimental water
For ultra-pure water；Described bisphenol-A standard serial solution: utilize aqueous-based food analogies to be measured as solvent, prepare bisphenol-A standard
Series, bisphenol A concentration is: the 0.0th, the 0.1st, the 0.5th, the 1.0th, the 10.0th, 100.0mg/L.
In step 2) in, described food contact material is membranaceous macromolecular material, and its thickness is less than 0.25mm, and its area is
0.24 square decimeter；Described food contact material e.g. Merlon, polyethylene, polyvinyl chloride, polypropylene etc..
In step 2) in, the volume of described aqueous-based food analogies is 30～50ml, preferably 40ml；Described food contacts
The area of material is 18～30cm2。
In step 3) in, described time interval is not less than 8 hours.
Invention further provides a kind of for detecting according to bisphenol-A specific transfer in the food contact material of the present invention
The on-line detecting system of amount, comprising: ultraviolet source, entrance slit, monochromator, grating, food contact material moving apparatus, detection
Device and computer；It is characterized in that: in the light path of vertical direction, be from top to bottom arranged in order for ultraviolet source, entrance slit,
It is the monochromator at 45 degree of angles with vertical line；It in light path in the horizontal direction, is arranged in order grating from monochromator from left to right, moves
Moving device, detector, electronic computer is connected with detector cable.
Described food contact material moving apparatus is cuboid, and the ultraviolet light plane of incidence and exit facet are optical glass, the end
Face and both sides are sanding glass.
The condition tested by the on-line monitoring system of the present invention meets GB/T 23296.1-2009, and " food contacts
In plastics plastics, in restricted substances, material is tested and content assaying method and food to food and food simulants specific transfer
Analogies exposure condition selects guide ".
During use, testing sample is placed in food contact material migration experimental provision and carries out migrating experiment, moving apparatus
Middle liquid level should be higher than that light path, and do not spill over top and be advisable.In the light path of vertical direction, the ultraviolet that sent by ultraviolet source (1)
Light after entrance slit and monochromator, formed horizontal direction, wavelength be the ultraviolet light of 278nm, through grating with level side
Migrate experimental provision and food simulated solution thereof to through food contact material, received and measured by detector the intensity of light, by
Electronic computer is calculated and be shown the concentration of bisphenol-A in moving apparatus.
According to bisphenol-A Special migration online test method in the food contact material of the present invention, utilize according to the present invention
Bisphenol-A on-line automatic monitoring system, in research food contact material during bisphenol-A Special migration, it is achieved that double
Quick, the stable on-line checking of phenol A, for the efficiency improving food contact material safety evaluation and summary special component
Transport is significant.
Compared with prior art, the on-line checking side of bisphenol-A Special migration in the food contact material that the present invention provides
The advantage of method and automatic checkout system thereof is:
1. food contact material is migrated experiment to combine with the detection of content of bisphenol A in simulated solution, it is achieved that simulated solution
Real-time, the dynamic monitoring of middle content of bisphenol A.
2. the content by bisphenol-A in Ultraviolet Photometric Method in-situ monitoring simulated solution, simplifies testing process.
3., by the calibration curve at electronic computer storage bisphenol A concentration, utilize Lan Bai-Beer law according to light intensity meter
Calculate the concentration of bisphenol-A in simulated solution, improve operating efficiency.
Brief description
Fig. 1 be the present invention food contact material in the schematic diagram of on-line automatic monitoring system of bisphenol-A Special migration.
Description of reference numerals: 1-ultraviolet source；2-entrance slit；3-monochromator；4-grating；5-food contact material migrates
Experimental provision；6-sample；7-detector；8-electronic computer.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in more detail, but the invention is not limited in this.
Embodiment 1:
Using the aqueous-based food analogies C ethanol water of 10% (volume fraction be) as solvent, preparation bisphenol-A standard system
Row, bisphenol A concentration is: the 0.0th, the 0.1st, the 0.5th, the 1.0th, the 10.0th, 100.0mg/L, measures its absorbance Criterion curve respectively,
The corresponding light absorption value of respective concentration is shown in Table 1.
Table 1
| C, concentration | 0 | 0.5 | 1 | 5 | 10 | 50 | 100 |
| A, absorbance | 0.00688 | 0.01253 | 0.01786 | 0.06774 | 0.13051 | 0.6246 | 1.2627 |
By calculating, working curve equation is A=0.012 C+0.005, coefficient correlation n=0.999
Cut area be 0.6 square decimeter of makrolon material as product contact material, be placed on food contact material
In moving apparatus.
Measure 100ml aqueous-based food analogies C solution and pour food contact material moving apparatus into, carry out migrating experiment.
Utilize apparatus of the present invention the 2nd, the 4th, the 6th, within 8 days, to measure absorbance in aqueous-based food analogies C respectively the respectively, calculate
As shown in table 2 to the result of bisphenol A concentration.
Table 2
| Time (my god) | 2 | 4 | 6 | 8 |
| Absorbance | 0.04232 | 0.09848 | 0.3291 | 0.7125 |
| Concentration (mg/L) | 3.11 | 7.79 | 27.01 | 58.96 |
Claims (7)
1. the online test method of bisphenol-A Special migration in food contact material, comprises the steps:
1) bisphenol-A standard serial solution addition food contact material moving apparatus is measured light absorption value, Criterion curve respectively
Equation (1):
A=(K b) C+a (1)
Wherein, A is absorbance；K is molar absorption coefficient, relevant with the wavelength of the character of absorbing material and incident light；C is extinction
The concentration of material；B is absorber thickness；A is deviation constant；
2) the aqueous-based food analogies measuring certain volume pour food contact material moving apparatus respectively into, then cut certain area
Food contact material be immersed in aqueous-based food analogies, prepare food simulants solution；
3) absorbance in results of regular determination food simulants at a certain time interval, then utilizes this absorbance recording, root
According to step 1) in the calibration curve equation (1) set up calculate the concentration of bisphenol-A in food simulants.
2. method according to claim 1, it is characterised in that: in step 2) in, the area of described food contact material with
The ratio of the volume of described aqueous-based food analogies is 0.6cm2/ml。
3. method according to claim 1, it is characterised in that: in step 2) in, described food contact material is membranaceous height
Molecular material, its thickness is less than 0.25mm.
4. method according to claim 3, it is characterised in that: described food contact material selected from Merlon, polyethylene,
Polyvinyl chloride and polypropylene.
5. method according to claim 1, it is characterised in that: in step 3) in, described time interval is not less than 8 hours.
6. bisphenol-A Special migration in the food contact material for enforcement according to aforementioned any one of claim
The on-line detecting system of on-line monitoring method, comprising: ultraviolet source (1), entrance slit (2), monochromator (3), grating (4), food
Product contact material moving apparatus (5), detector (7) and computer, it is characterised in that: in the light path of vertical direction, by up to
Under be arranged in order as ultraviolet source (1), entrance slit (2), be the monochromator (3) at 45 degree of angles with vertical line；In the horizontal direction
Light path on, be arranged in order grating (4), moving apparatus (5), detector (7), electronic computer from left to right from monochromator (3)
(8) it is connected with cable with detector (7).
7. on-line detecting system according to claim 6, it is characterised in that: described food contact material moving apparatus (5)
For cuboid, the ultraviolet light plane of incidence and exit facet are optical glass, and bottom surface and both sides are sanding glass.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610404457.8A CN106092945A (en) | 2016-06-08 | 2016-06-08 | The online test method of bisphenol-A migration amount and detecting system in food contact material |
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|---|---|---|---|
| CN201610404457.8A CN106092945A (en) | 2016-06-08 | 2016-06-08 | The online test method of bisphenol-A migration amount and detecting system in food contact material |
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| CN201610404457.8A Pending CN106092945A (en) | 2016-06-08 | 2016-06-08 | The online test method of bisphenol-A migration amount and detecting system in food contact material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298062A (en) * | 2018-11-02 | 2019-02-01 | 山东建筑大学 | A kind of material sound state of paddling impregnates the detection device and method of water test |
| CN109324004A (en) * | 2018-10-06 | 2019-02-12 | 聊城鲁西聚碳酸酯有限公司 | The method of content of bisphenol A is remained in a kind of measurement polycarbonate |
| CN110031457A (en) * | 2019-04-15 | 2019-07-19 | 深圳安吉尔饮水产业集团有限公司 | The measuring method of ethyl alcohol the amount of migration in a kind of food contact material |
| CN110296950A (en) * | 2019-07-01 | 2019-10-01 | 浙江华正新材料股份有限公司 | A method of the residual single the amount of migration of MAH in detection PP-g-MAH material |
| CN110320170A (en) * | 2019-07-01 | 2019-10-11 | 浙江华正新材料股份有限公司 | A method of remnants MAH content of monomer in measurement PP-g-MAH material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6608678B1 (en) * | 2000-10-19 | 2003-08-19 | General Electric Company | Situ determination of DPC and BPA in polycarbonate by Raman spectroscopy |
| CN103278487A (en) * | 2013-05-22 | 2013-09-04 | 广西师范大学 | Method for measuring bisphenol A in plastic product by means of aptamer-nanogold resonance rayleigh scattering spectrometry |
| CN103901011A (en) * | 2014-04-23 | 2014-07-02 | 常熟理工学院 | Method for detecting concentration of bisphenol A in sample |
-
2016
- 2016-06-08 CN CN201610404457.8A patent/CN106092945A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6608678B1 (en) * | 2000-10-19 | 2003-08-19 | General Electric Company | Situ determination of DPC and BPA in polycarbonate by Raman spectroscopy |
| CN103278487A (en) * | 2013-05-22 | 2013-09-04 | 广西师范大学 | Method for measuring bisphenol A in plastic product by means of aptamer-nanogold resonance rayleigh scattering spectrometry |
| CN103901011A (en) * | 2014-04-23 | 2014-07-02 | 常熟理工学院 | Method for detecting concentration of bisphenol A in sample |
Non-Patent Citations (3)
| Title |
|---|
| 中华人民共和国国家质量监督检验检疫总局等: "《GB/T 23296.1-2009 食品接 触塑料塑料中受限物质中物质向食品及食品模拟物特定迁移实验和含量测定方法以及食品模拟物暴露条件选择指南》", 31 March 2009, 中华人民共和国国家质量监督检验检疫总局等 * |
| 任霁晴，贾大兵，壮亚峰: "紫外分光光度法测定塑料制品中双酚 A", 《吉林化工学院学报》 * |
| 叶美君: "紫外分光光度法测定环氧树脂中的微量双酚A", 《化学世界》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324004A (en) * | 2018-10-06 | 2019-02-12 | 聊城鲁西聚碳酸酯有限公司 | The method of content of bisphenol A is remained in a kind of measurement polycarbonate |
| CN109298062A (en) * | 2018-11-02 | 2019-02-01 | 山东建筑大学 | A kind of material sound state of paddling impregnates the detection device and method of water test |
| CN109298062B (en) * | 2018-11-02 | 2024-06-07 | 山东建筑大学 | Detection device and method for dynamic and static soaking water test of wading material |
| CN110031457A (en) * | 2019-04-15 | 2019-07-19 | 深圳安吉尔饮水产业集团有限公司 | The measuring method of ethyl alcohol the amount of migration in a kind of food contact material |
| CN110296950A (en) * | 2019-07-01 | 2019-10-01 | 浙江华正新材料股份有限公司 | A method of the residual single the amount of migration of MAH in detection PP-g-MAH material |
| CN110320170A (en) * | 2019-07-01 | 2019-10-11 | 浙江华正新材料股份有限公司 | A method of remnants MAH content of monomer in measurement PP-g-MAH material |
| CN110320170B (en) * | 2019-07-01 | 2021-10-15 | 浙江华正新材料股份有限公司 | Method for measuring content of residual MAH monomer in PP-g-MAH material |
| CN110296950B (en) * | 2019-07-01 | 2021-10-15 | 浙江华正新材料股份有限公司 | Method for detecting migration quantity of MAH (maleic anhydride) residual monomers in PP-g-MAH material |
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Application publication date: 20161109 |