CN105067748A - Method used for determining melamine resin in textiles - Google Patents
Method used for determining melamine resin in textiles Download PDFInfo
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- CN105067748A CN105067748A CN201510483740.XA CN201510483740A CN105067748A CN 105067748 A CN105067748 A CN 105067748A CN 201510483740 A CN201510483740 A CN 201510483740A CN 105067748 A CN105067748 A CN 105067748A
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- melamine resin
- melamine
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- gas chromatography
- potassium hydroxide
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- 229920000877 Melamine resin Polymers 0.000 title claims abstract description 85
- 239000004640 Melamine resin Substances 0.000 title claims abstract description 59
- 239000004753 textile Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004817 gas chromatography Methods 0.000 claims abstract description 26
- 150000002500 ions Chemical class 0.000 claims abstract description 26
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical group NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims abstract description 23
- CASUWPDYGGAUQV-UHFFFAOYSA-M potassium;methanol;hydroxide Chemical compound [OH-].[K+].OC CASUWPDYGGAUQV-UHFFFAOYSA-M 0.000 claims abstract description 15
- 238000004451 qualitative analysis Methods 0.000 claims abstract description 13
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 8
- 239000000835 fiber Substances 0.000 claims description 25
- 238000004227 thermal cracking Methods 0.000 claims description 23
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 claims description 17
- 238000005336 cracking Methods 0.000 claims description 16
- -1 methylols Chemical class 0.000 claims description 11
- 239000000047 product Substances 0.000 claims description 10
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- 238000000197 pyrolysis Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 9
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 8
- USDJGQLNFPZEON-UHFFFAOYSA-N [[4,6-bis(hydroxymethylamino)-1,3,5-triazin-2-yl]amino]methanol Chemical compound OCNC1=NC(NCO)=NC(NCO)=N1 USDJGQLNFPZEON-UHFFFAOYSA-N 0.000 claims description 8
- 241001465754 Metazoa Species 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 6
- 235000013311 vegetables Nutrition 0.000 claims description 6
- 238000001819 mass spectrum Methods 0.000 claims description 5
- 150000007974 melamines Chemical class 0.000 claims description 5
- 229920000742 Cotton Polymers 0.000 claims description 4
- 241001597008 Nomeidae Species 0.000 claims description 4
- YGCOKJWKWLYHTG-UHFFFAOYSA-N [[4,6-bis[bis(hydroxymethyl)amino]-1,3,5-triazin-2-yl]-(hydroxymethyl)amino]methanol Chemical compound OCN(CO)C1=NC(N(CO)CO)=NC(N(CO)CO)=N1 YGCOKJWKWLYHTG-UHFFFAOYSA-N 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 4
- 235000013877 carbamide Nutrition 0.000 claims description 4
- 239000004202 carbamide Substances 0.000 claims description 4
- 239000007859 condensation product Substances 0.000 claims description 4
- 238000004132 cross linking Methods 0.000 claims description 4
- 238000010812 external standard method Methods 0.000 claims description 4
- 238000012113 quantitative test Methods 0.000 claims description 4
- 229920002972 Acrylic fiber Polymers 0.000 claims description 3
- 229920004934 Dacron® Polymers 0.000 claims description 3
- 241000283973 Oryctolagus cuniculus Species 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 229920000297 Rayon Polymers 0.000 claims description 3
- 229920002334 Spandex Polymers 0.000 claims description 3
- 229920004933 Terylene® Polymers 0.000 claims description 3
- 229920006221 acetate fiber Polymers 0.000 claims description 3
- 235000013399 edible fruits Nutrition 0.000 claims description 3
- 210000004209 hair Anatomy 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 239000004759 spandex Substances 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- 210000002268 wool Anatomy 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000005143 pyrolysis gas chromatography mass spectroscopy Methods 0.000 abstract 1
- 238000009736 wetting Methods 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 description 12
- 239000004744 fabric Substances 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 238000004949 mass spectrometry Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- 206010019133 Hangover Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000675 fabric finishing Substances 0.000 description 1
- 238000009962 finishing (textile) Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Landscapes
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention belongs to the technical field of analytic chemistry, and more specifically relates to a method used for determining melamine resin in textiles. The method comprises following steps: samples are weighed, and are delivered into a sample boat, and a potassium hydroxide methanol solution is added for wetting the samples; the sample boat is delivered into a pyrolysis gas chromatography mass spectrometry instrument for determination; qualitative analysis of methyl substituted products in obtained pyrolytic products is carried out, qualitative characteristic ions m/z140, m/z154, m/z168, m/z196, and m/z210 are extracted based on that the characteristic products of melamine resin pryolysis are melamine derivatives substituted with 3 to 6 methyl groups, if all the characteristic ions can be observed, it can be determined that the samples contain melamine resin, if not all the characteristic ions can be observed, it can be determined that the samples contain no melamine resin. The method is capable of reducing polarity of melamine greatly, and improving peak patterns of melamine in gas chromatography; detection is convenient; and relatively low detection limit can be reached.
Description
[technical field]
The invention belongs to technical field of analytical chemistry, specifically a kind of method measuring melamine resin in textile.
[background technology]
Melamine formaldehyde resin (MF) take melamine as the polymkeric substance of Material synthesis, this resin hardness is higher than Lauxite, nonflammable, water-fast, heat-resisting, ageing-resistant, resistance to electric arc, resistance to chemical attack, there are good insulating property, glossiness and physical strength, are widely used in timber, plastics, coating, papermaking, weaving, leather, the industry such as electric, medical.The basis of profit agent that melamine-formaldehyde resin is fabric finishing agent, leather is tanned, glazing agent and water repellent agent.
On market containing melamine and with the fabric-treating agent that melamine is main material production have carbamide condensation product crosslinking chemical, trimethylol melamine resin, hexamethylol melamine resin, trimethylol melamine resin (TMM), many methylols etherify melamine resin (6MD), water-proofing agent as water-proofing agent AEG, 703, FTC, FTG, MDT etc. belong to many melamine methylols derivant type.
The general polymer form all formed with melamine and other chemicals of these fabric-treating agents containing melamine exists, when carrying out fabric treating, fabric-treating agent can with the chemical bonding reaction on fabric, make fabric-treating agent grafting on fabric or be temporarily adsorbed on fabric fibre, to play certain chemical physics effect.But along with the use of fabric, as sunshine, washing agent effect, fabric-treating agent easily decomposes the monomer discharging melamine, and as fabric and contact human skin, the easy chafe of melamine monomer, damages.Therefore, owing to there is health risk, whether very necessaryly containing melamine resin measure in textile.
At present, the method of testing whether qualification contains melamine resin has a lot, have the method measuring free monomer, but melamine is general on the textile to be existed with resin and polymer form, only just may have the existence of free monomer when high-load.Thermal cracking also may be used for the discriminating of melamine resin, but directly measure in, cracking melamine monomer out due to polarity large, gas chromatography is difficult to detect, show as peak type poor, hangover is serious, and ion not feature, be easily subject to the interference of textile pyrolysis product.
[summary of the invention]
Object of the present invention is exactly will solve above-mentioned deficiency and provide a kind of method measuring melamine resin in textile, greatly reduces the polarity of melamine, makes its peak type in gas chromatography better, more easily detects, can reach lower detection limit.
Design a kind of method measuring melamine resin in textile for achieving the above object, comprise the following steps:
1) take sample, sample is put into example boat, add potassium hydroxide methanol solution and soak sample;
2) example boat is put into thermal cracking gas chromatography GC-MS to measure;
3) qualitative analysis: carry out qualitative analysis according to methyl substituted product in pyrolysis product, feature product based on melamine resin cracking is 3-6 methyl substituted melamine, extracting qualitative features ion is m/z140, m/z154, m/z168, m/z196, m/z210, if all characteristic ions all exist in sample, then be judged to be in sample containing melamine resin, if characteristic ion is incomplete in sample, be then judged to be in sample not containing melamine resin;
4) quantitative test: if qualitative analysis of samples is for containing melamine resin, get melamine solution, add potassium hydroxide methanol solution, put into thermal cracking gas chromatography GC-MS to measure, as quantitative criterion material, extracting characteristic ion m/z210 carries out quantitatively according to external standard method, and the content of melamine resin in calculation sample, content is in melamine monomer.
Step 1) in, in potassium hydroxide methanol solution, the concentration of potassium hydroxide is 1%-20%.
Step 2) in, the condition determination of thermal cracking gas chromatography GC-MS is: (1) gas chromatographic column adopts the HP-5MS post of low pole; (2) mass spectrum collection adopts and selects full scan mode to carry out simultaneously; (3) the cracking tube temperature of thermal cracking is 600 degree.
The parameter of thermal cracking gas chromatography GC-MS is: the column length of (1) gas chromatographic column is 30 meters, and column internal diameter is 0.25 millimeter, and thickness is 0.25 micron; (2) gas chromatographic sample introduction mouth temperature is set as 300 DEG C, and temperature programme is initial temperature 35 DEG C, is warmed up to 280 DEG C by 10 DEG C per minute, retains 5 minutes; (3) cracking instrument and gas chromatography interface temperature are 280 DEG C, and pyrolysis time is 0.2 minute.
Described melamine resin is carbamide condensation product crosslinking chemical, trimethylol melamine resin, hexamethylol melamine resin, trimethylol melamine resin, many methylols etherify melamine resin or many melamine methylols derivant.
Described sample is textile, described textile comprises vegetable fibre, animal origin and synthon, described vegetable fibre comprises cotton, fiber crops, fruit fiber, described animal origin comprises wool, the rabbit hair, silk, and described synthon comprise dacron, viscose fiber, acetate fiber, polyamide fibre, terylene, acrylic fibers, spandex, polyvinyl, polypropylene fibre, polyvinyl chloride fibre.
The present invention is by adding potassium hydroxide methanol solution in the sample to which, and put it into thermal cracking gas chromatography GC-MS and carry out reaction cracking, make its cracking melamine out and methyl alcohol reaction, generate methylated melamine, thus greatly reduce the polarity of melamine, make its peak type in gas chromatography better, more easily detect, lower detection limit can be reached.
[accompanying drawing explanation]
Fig. 1 is the mensuration total ion current figure of melamine resin in embodiment 1;
Fig. 2 is that the mensuration of melamine resin in embodiment 1 extracts characteristic ion figure.
[embodiment]
Of the present invention is a kind of method measuring melamine resin in textile, comprises the following steps:
1) take sample, sample is shredded into granule and puts into example boat, add potassium hydroxide methanol solution and soak sample, in this potassium hydroxide methanol solution, the concentration of potassium hydroxide is 1%-20%;
2) example boat is put into thermal cracking gas chromatography GC-MS to measure;
3) qualitative analysis: carry out qualitative analysis according to methyl substituted product in pyrolysis product, feature product based on melamine resin cracking is 3-6 methyl substituted melamine, extracting qualitative features ion is m/z140, m/z154, m/z168, m/z196, m/z210, if all characteristic ions all exist in sample, then be judged to be in sample containing melamine resin, if characteristic ion is incomplete in sample, be then judged to be in sample not containing melamine resin;
4) quantitative test: if qualitative analysis of samples is for containing melamine resin, get melamine solution, add potassium hydroxide methanol solution, put into thermal cracking gas chromatography GC-MS to measure, as quantitative criterion material, extract characteristic ion m/z210 and carry out quantitatively according to external standard method, the content of melamine resin in calculation sample, content is in melamine monomer, and the method detects and is limited to 1%.
Step 1) in, sample is textile, textile comprises vegetable fibre, animal origin and synthon, vegetable fibre comprises cotton, fiber crops, fruit fiber, animal origin comprises wool, the rabbit hair, silk, and synthon comprise dacron, viscose fiber, acetate fiber, polyamide fibre, terylene, acrylic fibers, spandex, polyvinyl, polypropylene fibre, polyvinyl chloride fibre.
Step 2) in, the condition determination of thermal cracking gas chromatography GC-MS is: (1) gas chromatographic column adopts the HP-5MS post of low pole; (2) mass spectrum collection adopts and selects full scan mode to carry out simultaneously; (3) the cracking tube temperature of thermal cracking is 600 degree; The parameter of thermal cracking gas chromatography GC-MS is: the column length of (1) gas chromatographic column is 30 meters, and column internal diameter is 0.25 millimeter, and thickness is 0.25 micron; (2) gas chromatographic sample introduction mouth temperature is set as 300 DEG C, and temperature programme is initial temperature 35 DEG C, is warmed up to 280 DEG C by 10 DEG C per minute, retains 5 minutes; (3) cracking instrument and gas chromatography interface temperature are 280 DEG C, and pyrolysis time is 0.2 minute.
Wherein, melamine resin is carbamide condensation product crosslinking chemical, trimethylol melamine resin, hexamethylol melamine resin, trimethylol melamine resin, many methylols etherify melamine resin or many melamine methylols derivant.
The invention belongs in analytical chemistry field the mensuration measuring melamine resin in textile, its principle is: take sample, add potassium hydroxide methanol solution, put into the analysis of thermal cracking gas chromatography GC-MS, the characteristic ion extracting cleavage reaction product carries out qualitative and quantitative analysis.Below in conjunction with specific embodiment, following further illustrating is done to the present invention:
Embodiment 1: the mensuration of melamine resin in green polyester capillaries cloth
1) accurately take 1.0mg sample in example boat, add 50 μ L5% potassium hydroxide methanol solutions and soak sample, put into the analysis of thermal cracking gas chromatography GC-MS.
2) thermal cracking-gas chromatograph mass spectrometry instrument parameter is:
(1) gas chromatographic column adopts the HP-5MS post of low pole, and specification is column length 30 meters, and column internal diameter is 0.25 millimeter, and thickness is 0.25 micron;
(2) gas chromatographic sample introduction mouth temperature is set as 300 DEG C, and temperature programme is initial temperature 35 DEG C, is warmed up to 280 DEG C by 10 DEG C per minute, retains 5 minutes;
(3) mass spectrum collection adopts and selects full scan mode to carry out;
(4) the cracking tube temperature of thermal cracking instrument: 600 DEG C, cracking instrument and gas chromatography interface temperature are 280 DEG C, and pyrolysis time is 0.2 minute.
3) result
(1) qualitative analysis: extracting qualitative features ion is m/z140, m/z154, m/z168, m/z196, m/z210, and in this sample, characteristic ion all exists, therefore be judged to be in sample containing melamine resin;
(2) quantitative test: get 1000ug/mL melamine solution 20 μ L, add potassium hydroxide methanol solution, put into thermal cracking gas chromatography GC-MS to measure, as quantitative criterion material, extracting characteristic ion m/z210 carries out quantitatively according to external standard method, the content of melamine resin in calculation sample, content is 2.0% (in melamine monomer).
As shown in Figures 1 and 2, accompanying drawing 1 is the mensuration total ion current figure of melamine resin in embodiment 1, and wherein, the peak of 21-23 minute is the peak of melamine resin cleavage reaction product methylated melamine; Accompanying drawing 2 is that the mensuration of melamine resin in embodiment 1 extracts characteristic ion figure.
Embodiment 2: the mensuration of melamine resin in white cotton
1) accurately take 1.0mg sample in example boat, add 50 μ L5% potassium hydroxide methanol solutions and soak sample, put into the analysis of thermal cracking gas chromatography GC-MS.
2) thermal cracking-gas chromatograph mass spectrometry instrument parameter:
(1) gas chromatographic column adopts the HP-5MS post of low pole, and specification is column length 30 meters, and column internal diameter is 0.25 millimeter, and thickness is 0.25 micron;
(2) gas chromatographic sample introduction mouth temperature is set as 300 DEG C, and temperature programme is initial temperature 35 DEG C, is warmed up to 280 DEG C by 10 DEG C per minute, retains 5 minutes;
(3) mass spectrum collection adopts and selects full scan mode to carry out;
(4) the cracking tube temperature of thermal cracking instrument: 600 DEG C, cracking instrument and gas chromatography interface temperature are 280 DEG C, and pyrolysis time is 0.2 minute.
3) result
Qualitative analysis: extracting qualitative features ion is m/z140, m/z154, m/z168, m/z196, m/z210, and in this sample, characteristic ion does not all exist, therefore be judged to be in sample not containing melamine resin.
The present invention, by the restriction of above-mentioned embodiment, change, the modification done, substitutes, combines, simplifies under other any does not deviate from Spirit Essence of the present invention and principle, all should be equivalent substitute mode, is included within protection scope of the present invention.
Claims (6)
1. measure a method for melamine resin in textile, it is characterized in that, comprise the following steps:
1) take sample, sample is put into example boat, add potassium hydroxide methanol solution and soak sample;
2) example boat is put into thermal cracking gas chromatography GC-MS to measure;
3) qualitative analysis: carry out qualitative analysis according to methyl substituted product in pyrolysis product, feature product based on melamine resin cracking is 3-6 methyl substituted melamine, extracting qualitative features ion is m/z140, m/z154, m/z168, m/z196, m/z210, if all characteristic ions all exist in sample, then be judged to be in sample containing melamine resin, if characteristic ion is incomplete in sample, be then judged to be in sample not containing melamine resin;
4) quantitative test: if qualitative analysis of samples is for containing melamine resin, get melamine solution, add potassium hydroxide methanol solution, put into thermal cracking gas chromatography GC-MS to measure, as quantitative criterion material, extracting characteristic ion m/z210 carries out quantitatively according to external standard method, and the content of melamine resin in calculation sample, content is in melamine monomer.
2. the method for claim 1, is characterized in that: step 1) in, in potassium hydroxide methanol solution, the concentration of potassium hydroxide is 1%-20%.
3. method as claimed in claim 2, is characterized in that, step 2) in, the condition determination of thermal cracking gas chromatography GC-MS is:
(1) gas chromatographic column adopts the HP-5MS post of low pole;
(2) mass spectrum collection adopts and selects full scan mode to carry out simultaneously;
(3) the cracking tube temperature of thermal cracking is 600 degree.
4. method as claimed in claim 3, is characterized in that: the parameter of thermal cracking gas chromatography GC-MS is:
(1) column length of gas chromatographic column is 30 meters, and column internal diameter is 0.25 millimeter, and thickness is 0.25 micron;
(2) gas chromatographic sample introduction mouth temperature is set as 300 DEG C, and temperature programme is initial temperature 35 DEG C, is warmed up to 280 DEG C by 10 DEG C per minute, retains 5 minutes;
(3) cracking instrument and gas chromatography interface temperature are 280 DEG C, and pyrolysis time is 0.2 minute.
5. method as claimed in claim 4, is characterized in that: described melamine resin is carbamide condensation product crosslinking chemical, trimethylol melamine resin, hexamethylol melamine resin, trimethylol melamine resin, many methylols etherify melamine resin or many melamine methylols derivant.
6. method as claimed in claim 5, it is characterized in that: described sample is textile, described textile comprises vegetable fibre, animal origin and synthon, described vegetable fibre comprises cotton, fiber crops, fruit fiber, described animal origin comprises wool, the rabbit hair, silk, and described synthon comprise dacron, viscose fiber, acetate fiber, polyamide fibre, terylene, acrylic fibers, spandex, polyvinyl, polypropylene fibre, polyvinyl chloride fibre.
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| CN201510483740.XA CN105067748B (en) | 2015-08-07 | 2015-08-07 | Method used for determining melamine resin in textiles |
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| CN201510483740.XA CN105067748B (en) | 2015-08-07 | 2015-08-07 | Method used for determining melamine resin in textiles |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651898A (en) * | 2016-03-29 | 2016-06-08 | 阿特斯(中国)投资有限公司 | Method for testing cross-linking agent content in EVA (ethylene vinyl acetate copolymer) film |
| CN107085047A (en) * | 2017-04-07 | 2017-08-22 | 浙江工业大学 | The analysis method of polyacrylic acid and its esters polymer in a kind of detection textile |
| CN109270175A (en) * | 2018-08-17 | 2019-01-25 | 安徽佳通乘用子午线轮胎有限公司 | Resin analyzes and identifies method in a kind of vulcanized rubber |
| CN112858537A (en) * | 2021-04-14 | 2021-05-28 | 上海市质量监督检验技术研究院 | Rapid detection method for permethrin in anti-mosquito fabric |
| CN114460200A (en) * | 2022-02-09 | 2022-05-10 | 上海市质量监督检验技术研究院 | Method for identifying silk cotton methacrylamide grafting weight gain |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651898A (en) * | 2016-03-29 | 2016-06-08 | 阿特斯(中国)投资有限公司 | Method for testing cross-linking agent content in EVA (ethylene vinyl acetate copolymer) film |
| CN107085047A (en) * | 2017-04-07 | 2017-08-22 | 浙江工业大学 | The analysis method of polyacrylic acid and its esters polymer in a kind of detection textile |
| CN109270175A (en) * | 2018-08-17 | 2019-01-25 | 安徽佳通乘用子午线轮胎有限公司 | Resin analyzes and identifies method in a kind of vulcanized rubber |
| CN112858537A (en) * | 2021-04-14 | 2021-05-28 | 上海市质量监督检验技术研究院 | Rapid detection method for permethrin in anti-mosquito fabric |
| CN112858537B (en) * | 2021-04-14 | 2023-09-05 | 上海市质量监督检验技术研究院 | Quick detection method for permethrin in anti-mosquito fabric |
| CN114460200A (en) * | 2022-02-09 | 2022-05-10 | 上海市质量监督检验技术研究院 | Method for identifying silk cotton methacrylamide grafting weight gain |
| CN114460200B (en) * | 2022-02-09 | 2023-08-08 | 上海市质量监督检验技术研究院 | Method for identifying weight gain of silk floss methacrylamide grafted polymer |
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| CN105067748B (en) | 2017-02-01 |
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