CN105466804A - Polyamide fiber identification reagent, preparation method thereof and detection method by using the same - Google Patents
Polyamide fiber identification reagent, preparation method thereof and detection method by using the same Download PDFInfo
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- CN105466804A CN105466804A CN201410397579.XA CN201410397579A CN105466804A CN 105466804 A CN105466804 A CN 105466804A CN 201410397579 A CN201410397579 A CN 201410397579A CN 105466804 A CN105466804 A CN 105466804A
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Abstract
The present invention relates to a polyamide fiber identification reagent, and a preparation method thereof and a detection method by using the same. The reagent is prepared from concentrated hydrochloric acid and water in the weight ratio of 36.45:63.55. The detection method is as below: taking a 5g sample containing the polyamide fabric and spandex fiber, placing the sample in a Soxhlet extractor, extracting with a petroleum ether for 1h, cycling for at least six times per hour, violating the petroleum ether in the sample, immersing the sample in cold water for 1h, then immersing the sample in water of 65 DEG C for 1h by the ratio of water to sample of 100:1, stirring the solution, then conducting suction or centrifugal dewatering, and drying; placing the sample in a stoppered triangular flask, adding 100ml of polyamide fiber identification reagent in each gram of the sample, fully dissolving the polyamide fiber, washing the remaining fibers with polyamide fiber identification reagent with the same concentration at the same temperature for 2-3 times, neutralizing with a dilute ammonia solution, and then washing by water until indicator detection shows a neutral state; and finally drying, cooling and weighing.
Description
Technical field
The present invention relates to nylon fibre identification reagent and preparation method thereof, utilize its detection method.
Background technology
Polyamide fibre, spandex fibre mixing dress material have higher elasticity and excellence rebound performance, soft, wear comfortable, can pretty figure be manifested, add easy absorbing sweat, do not produce the feature of electrostatic, this kind fabric has been widely used in the clothes that underwear stretches to needs such as coats, as clothes such as professional motion clothes, body-building clothes, easy dress, brassiere, socks classes.From knitted fabric to woven fabric, from clothes cloth to decorating cloth and functional material.In prior art, these three kinds of methods of 80% formic acid method, 20% hydrochloric acid method, dimethyl formamide method are had to the quantitative detecting method of polyamide fibre, spandex fibre mixing dress material, the weak point of three kinds of method existence is, because the loss in weight of spandex fibre in testing process is comparatively large, make Detection accuracy lower.
Summary of the invention
Goal of the invention of the present invention is to provide a kind of nylon fibre identification reagent and preparation method thereof, utilize its detection method, high to the quantitative Detection accuracy of polyamide fibre, spandex fibre mixing dress material.
Based on same inventive concept, the present invention has three independently technical schemes:
1, a nylon fibre identification reagent, is characterized in that: by concentrated hydrochloric acid and water formulated, the ratio of weight and number of concentrated hydrochloric acid and water is 36.45:63.55.
2, a preparation method for above-mentioned nylon fibre identification reagent, is characterized in that: extract hydrochloric acid, inject hydrochloric acid 36.45ml, poured into by hydrochloric acid in beaker in graduated cylinder; Extract water, in graduated cylinder, inject water 63.55ml; Pour water into aforementioned filling in the beaker of concentrated hydrochloric acid, and stir with glass bar; Being moistened with deployed reagent point with glass bar drops in the middle part of PH test paper, detects the potential of hydrogen of reagent; Reagent is poured into wide-necked bottle with glass bar drainage slowly.
3, a kind of detection method utilizing above-mentioned nylon fibre identification reagent, it is characterized in that: get the sample 5g be made up of nylon fibre and spandex fibre, sample is placed in soxhlet's extractor, use petroleum ether extraction 1h, at least circulation per hour 6 times, after the sherwood oil volatilization in sample, sample is immersed in cold water, soaks 1h, 1h is soaked again in the water of 65 DEG C, water is 100:1 with the ratio of sample, and simultaneously agitating solution, then suction or centrifugal dehydration, dries; Sample is put into baking oven, dries 4h-16h; Cool in exsiccator, for subsequent use;
Sample is put into tool plug triangular flask again, every gram of sample adds 100ml nylon fibre identification reagent, vibrate 20min under room temperature state, after nylon fibre fully dissolves, with the fritted filter of known weight, the nylon fibre identification reagent of remaining fiber equality of temperature with concentration is washed 2-3 times, neutralize with liquor ammoniae dilutus, then be washed to till being neutrality with indicator inspection, wash at every turn and all use vacuum draw discharge opeing afterwards, finally dry, cool, weigh.
Beneficial effect of the present invention:
Reagent of the present invention by concentrated hydrochloric acid and water formulated, the ratio of weight and number of concentrated hydrochloric acid and water is 36.45:63.55, can make in testing process, nylon fibre is melted in reagent completely, meanwhile, spandex fibre does not have the loss in weight, and in existing detection method, the loss in weight of spandex fibre 0.7-1.5%, thus makes Detection accuracy of the present invention to reach 100%.
The present invention prepares in Reagent Protocol, first extracts hydrochloric acid, injects hydrochloric acid 36.45ml in graduated cylinder, is poured into by hydrochloric acid in beaker; Then extract water, in graduated cylinder, inject water 63.55ml; Pour water into aforementioned filling in the beaker of concentrated hydrochloric acid, and stir with glass bar, method is simple, is easy to operation, meanwhile, is moistened with deployed reagent point drops in the middle part of PH test paper with glass bar, detects the potential of hydrogen of reagent, guarantees the preparation quality of reagent further.
In detection method, get the sample 5g be made up of nylon fibre and spandex fibre, sample is placed in soxhlet's extractor, use petroleum ether extraction 1h, at least circulation per hour 6 times, after the sherwood oil volatilization in sample, sample is immersed in cold water, soaks 1h, 1h is soaked again in the water of 65 DEG C, water is 100:1 with the ratio of sample, and simultaneously agitating solution, then suction or centrifugal dehydration, dries; Sample is put into baking oven, dries 4h-16h; Cool in exsiccator, for subsequent use, this kind, to the disposal route of sample, really ensure that the accuracy rate of detection further.
Embodiment
1. prepare reagent
Extract concentrated hydrochloric acid.In graduated cylinder, inject concentrated hydrochloric acid 36.45ml, concentrated hydrochloric acid is poured in beaker; When injecting concentrated hydrochloric acid in graduated cylinder, arrest graduated cylinder with left hand, make graduated cylinder low dip, the right hand takes reagent bottle (vial of dense hydrochloric acid is housed), and bottleneck is close to graduated cylinder mouth, and liquid is slowly flowed into.When amount to be implanted is slightly fewer than aequum, graduated cylinder is placed in horizontal table top, uses glue head dropper instead and be added drop-wise to required amount, scale face will face toward people.Deng 1-2 minutes, the concentrated hydrochloric acid be attached on inwall is fallen, graduated cylinder is placed on smooth desktop, when observing scale, in sight line and graduated cylinder, the lowest part of the concave meniscus of concentrated hydrochloric acid keeps level, then reads the volume number 36.45ml of concentrated hydrochloric acid.Otherwise reading can be higher or on the low side.Again concentrated hydrochloric acid is poured in beaker.
Extract water.In graduated cylinder, inject water 63.55ml, operation notice is with extracting concentrated hydrochloric acid step.
Mix and blend.Water is poured into aforementioned filling in the beaker of dense hydrochloric acid, and stir with glass bar.
Detect.Being moistened with deployed reagent point with glass bar drops in the middle part of PH test paper, detects the potential of hydrogen of reagent.
Finally, the reagent of preparation is made up of concentrated hydrochloric acid and water, and the ratio of weight and number of concentrated hydrochloric acid and water is 36.45:63.55, and reagent is poured into wide-necked bottle with glass bar drainage slowly.
2. utilize reagent of the present invention to detect
Get the sample 5g be made up of nylon fibre and spandex fibre, sample is placed in soxhlet's extractor, use petroleum ether extraction 1h, at least circulation per hour 6 times, after the sherwood oil volatilization in sample, sample is immersed in cold water, soak 1h, then soak 1h in the water of 65 DEG C, water is 100:1 with the ratio of sample, and simultaneously agitating solution, then suction or centrifugal dehydration, to dry; Sample is put into baking oven, dries 4h-16h; Cool in exsiccator, for subsequent use;
Sample is put into tool plug triangular flask again, every gram of sample adds 100ml nylon fibre identification reagent of the present invention, vibrate 20min under room temperature state, after nylon fibre fully dissolves, with the fritted filter of known weight, of the present invention nylon fibre identification reagent of remaining fiber equality of temperature with concentration is washed 2-3 times, neutralize with liquor ammoniae dilutus, then be washed to till being neutrality with indicator inspection, wash at every turn and all use vacuum draw discharge opeing afterwards, finally dry, cool, weigh.
Test shows, during the present invention detects, nylon fibre can be melted into reagent completely, and spandex fibre does not have the loss in weight, record nylon fibre, spandex fibre percentage composition than completely the same with real proportioning, Detection accuracy reaches 100%.
Claims (3)
1. a nylon fibre identification reagent, is characterized in that: by concentrated hydrochloric acid and water formulated, the ratio of weight and number of concentrated hydrochloric acid and water is 36.45:63.55.
2. a preparation method for nylon fibre identification reagent described in claim 1, is characterized in that: extract hydrochloric acid, inject hydrochloric acid 36.45ml, poured into by hydrochloric acid in beaker in graduated cylinder; Extract water, in graduated cylinder, inject water 63.55ml; Pour water into aforementioned filling in the beaker of concentrated hydrochloric acid, and stir with glass bar; Being moistened with deployed reagent point with glass bar drops in the middle part of PH test paper, detects the potential of hydrogen of reagent; Reagent is poured into wide-necked bottle with glass bar drainage slowly.
3. one kind utilizes the detection method of nylon fibre identification reagent described in claim 1, it is characterized in that: get the sample 5g be made up of nylon fibre and spandex fibre, sample is placed in soxhlet's extractor, use petroleum ether extraction 1h, at least circulation per hour 6 times, after the sherwood oil volatilization in sample, sample is immersed in cold water, soaks 1h, 1h is soaked again in the water of 65 DEG C, water is 100:1 with the ratio of sample, and simultaneously agitating solution, then suction or centrifugal dehydration, dries; Sample is put into baking oven, dries 4h-16h; Cool in exsiccator, for subsequent use; Sample is put into tool plug triangular flask again, every gram of sample adds 100ml nylon fibre identification reagent, vibrate 20min under room temperature state, after nylon fibre fully dissolves, with the fritted filter of known weight, the nylon fibre identification reagent of remaining fiber equality of temperature with concentration is washed 2-3 times, neutralize with liquor ammoniae dilutus, then be washed to till being neutrality with indicator inspection, wash at every turn and all use vacuum draw discharge opeing afterwards, finally dry, cool, weigh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410397579.XA CN105466804A (en) | 2014-08-13 | 2014-08-13 | Polyamide fiber identification reagent, preparation method thereof and detection method by using the same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410397579.XA CN105466804A (en) | 2014-08-13 | 2014-08-13 | Polyamide fiber identification reagent, preparation method thereof and detection method by using the same |
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| CN105466804A true CN105466804A (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410397579.XA Pending CN105466804A (en) | 2014-08-13 | 2014-08-13 | Polyamide fiber identification reagent, preparation method thereof and detection method by using the same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110618057A (en) * | 2019-10-29 | 2019-12-27 | 东莞市中鼎检测技术有限公司 | Method for detecting content of spandex and viscose in spandex and viscose blended fabric |
Citations (2)
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| CN102103052A (en) * | 2009-12-22 | 2011-06-22 | 北京市纺织纤维检验所 | Method for rapidly identifying fibers |
| CN102426147A (en) * | 2011-09-08 | 2012-04-25 | 上海工程技术大学 | Method for distinguishing Lyocell bamboo fiber in blending product |
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2014
- 2014-08-13 CN CN201410397579.XA patent/CN105466804A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103052A (en) * | 2009-12-22 | 2011-06-22 | 北京市纺织纤维检验所 | Method for rapidly identifying fibers |
| CN102426147A (en) * | 2011-09-08 | 2012-04-25 | 上海工程技术大学 | Method for distinguishing Lyocell bamboo fiber in blending product |
Non-Patent Citations (5)
| Title |
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| 傅科杰 等: "聚乳酸/棉混纺产品定量分析比较", 《印染》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110618057A (en) * | 2019-10-29 | 2019-12-27 | 东莞市中鼎检测技术有限公司 | Method for detecting content of spandex and viscose in spandex and viscose blended fabric |
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