CN101281140B - Rapid measuring method of fabric pH value - Google Patents
Rapid measuring method of fabric pH value Download PDFInfo
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- CN101281140B CN101281140B CN2008100590997A CN200810059099A CN101281140B CN 101281140 B CN101281140 B CN 101281140B CN 2008100590997 A CN2008100590997 A CN 2008100590997A CN 200810059099 A CN200810059099 A CN 200810059099A CN 101281140 B CN101281140 B CN 101281140B
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Abstract
The invention discloses a quick determination method for PH value of a textile. Prior determination method has too many working procedures, and wastes time, and hurts the textile because of using a PH determination device. Extreme inconvenience is existent in production application, which is not benefit for quickly monitoring. The invention has flowing the steps that: filter paper is set under the textile which is to be determined, and extraction liquid is dropped in the textile surface, then force application is affected to the position of dropping the extraction liquid, and the extraction liquid permeates into the filter paper through the textile, afterwards, a mixed indicator is dropped on the position of dropping the extraction liquid, after color development, PH value is quickly determined through color in the filter paper, the mixed indicator includes phenothalin indicator, bromothymol blue indicator, methyl red indicator and thymol phenothalin indicator. The invention can determine the textile PH value which changes from 3.0 to 11.0 by application of complementary color in the mixed indicator under the condition of different acidity-basicity of indicator, therefore, the quick, simple, high accuracy determination for the textile PH value is achieved.
Description
Technical field
The invention discloses a kind of rapid assay methods of fabric pH value.
Background technology
International Textile ecological Studies and check association mention textile pH-value range of control and be in Oeko-Tex standard 100 latest editions of issue on February 9th, 2002: baby's class is 4.0-7.5, directly contacting with skin is 4.0-7.5, directly not contacting with skin is 4.0-9.0, and ornament materials is 4.0-9.0; The product that must carry out wet process in the road processing of back wherein, it allows the pH value between 4.0-10.5.The leather of ornament materials, coating or lamination joint product, it allows the pH value between 3.5-9.0.
The pH value of fabric is generally tested according to standard methods such as AATCC 81, ISO 3071, GB/T 7573 at present.Need before the test sample is shredded, and be equipped with corresponding testing apparatus, comprise that pH meter, constant temperature shaking bath pot, pH value are standard buffer solution and some other Routine Test Lab equipment of 4.0,7.0,10.0.
The U.S. textile chemist with the operation steps of the fabric pH value method of testing AATCC 81 of printing and dyeing Shi Xiehui (AATCC) regulation is: take by weighing sample 10 ± 0.1g, each sample get two groups parallel, 10min is boiled in the mitigation of 250ml distilled water, add sample, cover surface plate, boil 10min again, be cooled to room temperature, take out sample, residual drop returns in the former beaker, as solution to be measured, calibrates pH meter with buffer solution, the pH value of measurement and recording solution, all test results must treat that pH meter can reading after stable.
The operation steps of the fabric pH value method of testing ISO 3071 of International Organization for Standardization regulation is: take by weighing sample 2 ± 0.05g, every group of sample get three groups parallel, the distilled water that adds the 100ml cooling through boiling, vibration 1h leaches, as solution to be measured, calibrate pH meter with buffer solution, with first glass of solution rinse pH electrode, measure and write down the pH value of second glass and the 3rd glass solution, all test results must treat that pH meter can reading after stable.
The operation steps of CNS GB/T 7573 is: take by weighing sample 2 ± 0.05g, every group of sample get three groups parallel, add 100ml distilled water, vibrated 1 hour, and leached, as solution to be measured, calibrate pH meter with buffer solution, with first glass of solution rinse pH electrode, measure and write down the pH value of second glass and the 3rd glass solution, all test results must treat that pH meter can reading after stable.
The operation of above-mentioned method of testing is many, and is time-consuming, be by the pH tester, and fabric had damage.In big production, use very inconvenience, be unfavorable for fast monitored.
Summary of the invention
Technical matters to be solved by this invention is to overcome the shortcoming that above-mentioned prior art exists, provide a kind of fast, simply, the assay method of fabric pH value accurately.
For this reason, the technical solution used in the present invention is as follows: the rapid assay methods of fabric pH value, its step is as follows: filter paper is placed below the fabric to be measured, drip extract at fabric face, then in the extract dropping place application of force, making extract see through fabric is seeped on the filter paper, drip mixed indicator in extract dropping place then, judge the pH value of fabric after the colour developing fast according to the color on the filter paper, described mixed indicator comprises phenolphthalein indicator, Bromothymol blue indicator, methyl red indicator and Thymol phthalein indicator.The present invention to the selection of mixed indicator based on following reason: (1) methyl red indicator is colourless under alkali condition, and the pH value takes on a red color less than 4.2, and the pH value is more little, and is red more.The pH value is between 4.2-6.2, and for orange, more near 4.2, ruddiness is heavy more, and more near 6.2, gold-tinted is heavy more.(2) Bromothymol blue (also claiming bromthymol blue) pH value is yellow green between 6.0-7.6, and heavy more near 6.0 gold-tinteds more, more near 7.6, blue light is heavy more.(3) phenolphthalein indicator pH value is colourless less than 8.2, between 8.2-10.0, takes on a red color, and greater than 10.0, ruddiness is heavy.(4) thymolphthalein (also claiming thymolphthalein) indicator pH value is colourless less than 9.0, is blue between the 9.0-10.2, and greater than 10.2, blue light is heavy.The present invention uses the colour developing complementation of different indicator under acid-base condition, can measure the variation of fabric pH value between 3.0-11.0, thereby has realized the fast detecting of fabric pH value.Up to the present, do not appear in the newspapers as yet about the rapid assay methods of fabric pH value.Adopt the method among the present invention to measure, fast, simple, accuracy is good, can satisfy the requirement of the textile pH-value range of control of mentioning in the Oeko-Tex standard latest edition of International Textile ecological Studies and the issue of check association fully.The present invention no matter fabric do, wet condition, do not influence final colour developing and judgement.
When measuring raw white or brightened goods, can place filter paper fabric under, extract, mixed indicator are successively dripped same place at fabric face, directly situation about developing the color by fabric face is judged the pH value of fabric fast.When mensuration has color fabric (except that white fabrics),, must under fabric, place filter paper, judge by the colour developing of filter paper owing to be subjected to the shielding of fabric color.
Above-mentioned rapid assay methods, being prepared as follows of described mixed indicator: phenolphthalein indicator, Bromothymol blue indicator, methyl red indicator and Thymol phthalein indicator are dissolved in the solvent, with NaOH solution the solution of gained are transferred to green again.
Above-mentioned rapid assay methods, the concentration of each indicator is as follows in the mixed indicator: phenolphthalein indicator 1.0-2.0g/L, Bromothymol blue indicator 0.5-1.2g/L, methyl red indicator 0.1-1.0g/L and Thymol phthalein indicator 0.1-1.0g/L.
Above-mentioned rapid assay methods, described solvent are one or more the mixed solvents in ethanol, diglycol, the ethylene glycol.
Above-mentioned rapid assay methods, described extract are the aqueous solution of one or more potpourris in sodium chloride, magnesium chloride or the glauber salt, and its concentration is 10-100g/L.
Above-mentioned rapid assay methods after second, is judged fabric pH value by the situation of colour developing at colour developing 5-10, and when showing orange red, the pH value is 3; When the outer ring is orange red, when inner ring had yellow, the pH value was 4; When the outer ring is orange red, when inner ring had tangible yellow green, the pH value was 5; When the outer ring is a yellow green, when inner ring had a little green, the pH value was 6; When the outer ring is a yellow green, inner ring is green obviously the time, and the pH value is 7; When the outer ring green, when the inner ring green was obvious, the pH value was 8; Blackish green when the outer ring, when inner ring was green, the pH value was 9; When a little purple of outer ring, when inner ring was blackish green, the pH value was 10; Purple is obvious when the outer ring, and when inner ring was blackish green, the pH value was 11.
Above-mentioned rapid assay methods, described filter paper are the middling speed qualitative filter paper.
The different colour developing complementation of indicator under acid-base condition in the application mix indicator of the present invention, can measure the variation of fabric pH value between 3.0-11.0, thereby realized fabric pH value fast, simple, detection that accuracy is good, satisfied the requirement of the textile pH-value range of control of mentioning in the Oeko-Tex standard latest edition of International Textile ecological Studies and the issue of check association fully, helped the control of printing and dyeing mill, laboratory, testing agency big production semi-manufacture, finished product fabric quality; No matter fabric do, wet condition, do not influence final colour developing and judgement.
The present invention is further illustrated below in conjunction with embodiment.
Embodiment
Embodiment 1-5 is used for measuring the pH value that color fabric (except that white fabrics) is arranged, and embodiment 6 is used to measure the pH value of white fabrics.
Embodiment 1: take by weighing phenolphthalein indicator 1.6g, Bromothymol blue indicator 0.9g, methyl red indicator 0.4g, Thymol phthalein indicator 0.2g and be dissolved in fully in the 1L ethanol (quality percentage composition about 95%), mixed indicator, transfer to solution with the NaOH of 0.1mol/L and become green and get final product.Above-mentioned solution is placed Brown Glass Brown glass bottles and jars only, standby.Take by weighing glauber salt 50 grams, be dissolved in the 1L deionized water, and this extract is placed Brown Glass Brown glass bottles and jars only, standby.Filter paper is placed under the fabric to be measured, drip extract at fabric face then, and firmly press dropping place 5 times, drip mixed indicator in same dropping place again, behind the colour developing 5-10s, judge the pH value of fabric according to the change color on the filter paper with finger.
Embodiment 2: take by weighing phenolphthalein indicator 1.0g, Bromothymol blue indicator 0.9g, methyl red indicator 0.4g, Thymol phthalein indicator 0.2g and be dissolved in fully in the 1L ethanol (about 95%), mixed indicator, transfer to solution with the NaOH of 0.1mol/L and become green and get final product.Above-mentioned solution is placed Brown Glass Brown glass bottles and jars only, standby.Take by weighing salt 50 grams, be dissolved in the 1L deionized water, and this extract is placed Brown Glass Brown glass bottles and jars only, standby.Filter paper is placed under the fabric to be measured, drip extract at fabric face then, and firmly press dropping place 5 times, drip mixed indicator in same dropping place again, behind the colour developing 5-10s, judge the pH value of fabric according to the change color on the filter paper with finger.
Embodiment 3: take by weighing phenolphthalein indicator 1.0g, Bromothymol blue indicator 1.1g, methyl red indicator 0.4g, Thymol phthalein indicator 0.3g and be dissolved in fully in the 1L diglycol (about 95%), mixed indicator, transfer to solution with the NaOH of 0.1mol/L and become green and get final product.Above-mentioned solution is placed Brown Glass Brown glass bottles and jars only, standby.Take by weighing magnesium chloride 80 grams, be dissolved in the 1L deionized water, and this extract is placed Brown Glass Brown glass bottles and jars only, standby.Filter paper is placed below the fabric to be measured, drip extract at fabric face then, and firmly press dropping place 5 times, drip mixed indicator in same dropping place again, behind the colour developing 5-10s, according to the pH value of the judgement of the change color on filter paper fabric with finger.
Embodiment 4: take by weighing phenolphthalein indicator 1.0g, Bromothymol blue indicator 1.1g, methyl red indicator 0.6g, Thymol phthalein indicator 0.2g and be dissolved in fully in the 1L diglycol (about 95%), mixed indicator, transfer to solution with the NaOH of 0.1mol/L and become green and get final product.Above-mentioned solution is placed Brown Glass Brown glass bottles and jars only, standby.Take by weighing magnesium chloride 70 grams, be dissolved in the 1L deionized water, and this extract is placed Brown Glass Brown glass bottles and jars only, standby.Filter paper is placed under the fabric to be measured, drip extract at fabric face then, and firmly press salt solution dropping place 5 times with finger, drip mixed indicator in same dropping place again, cloth cover pH value is judged according to the change color on the filter paper in the back of can developing the color.
Embodiment 5: take by weighing phenolphthalein indicator 1.0g, Bromothymol blue indicator 1.2g, methyl red indicator 0.6g, Thymol phthalein indicator 0.8g and be dissolved in fully in the 1L ethylene glycol (about 95%), mixed indicator, transfer to solution with the NaOH of 0.1mol/L and become green and get final product.Above-mentioned solution is placed Brown Glass Brown glass bottles and jars only, standby.Take by weighing magnesium chloride 70 grams, be dissolved in the 1L deionized water, and this extract is placed Brown Glass Brown glass bottles and jars only, standby.Filter paper is placed under the fabric to be measured, drip extract at fabric face then, and firmly press dropping place 5 times, drip mixed indicator in same dropping place again, behind the colour developing 5-10s, judge the pH value of fabric according to the change color on the filter paper with finger.
Embodiment 6: take by weighing phenolphthalein indicator 1.3g, Bromothymol blue indicator 0.9g, methyl red indicator 0.6g, Thymol phthalein indicator 0.7g and be dissolved in fully in the 1L ethylene glycol (about 95%), mixed indicator, transfer to solution with the NaOH of 0.1mol/L and become green and get final product.Above-mentioned solution is placed Brown Glass Brown glass bottles and jars only, standby.Take by weighing magnesium chloride 70 grams, be dissolved in the 1L deionized water, and this extract is placed Brown Glass Brown glass bottles and jars only, standby.Drip extract on the white fabrics surface, and firmly press dropping place 5 times, drip mixed indicator in same dropping place again, behind the colour developing 5-10s, judge the pH value of white fabrics according to the change color on white fabrics surface with finger.
Certainly, the method for the also available embodiment 1-5 of pH value of white fabrics is measured, and embodiment 6 relative embodiment 1-5 are easier.
Experimental result shows: extract of the present invention and mixed indicator prescription is unique, to the fabric not damaged, and highly sensitive, precision is high; Simultaneously assay method is simple to operate, is easy in the big production and processing by instant detection, can optimize technology, minimizing defect rate to detections of dispatching from the factory of the online detection of fabric pH value and finished product.
The application of said determination method
Respectively with black spring Asia spin, coffee-like all cotton yarn, the thin fourth of this rice be determination object, the measurement result of measurement result of the present invention and prior art ISO3071 standard method is compared.Experiment shows that measurement result is not subjected to the shielding and the influence of fabric color, and the measurement result that draws with the ISO3071 method is consistent, and the result is shown in table 1-3.
Table 1: the black spring Asia with 4 different pH values is spun as determination object.
Table 2: with the coffee-like all cotton yarn of 6 different pH values as determination object.
Table 3: with the thin fourth of this rice of 6 different pH values as determination object.
The above only is preferred embodiment of the present invention.Every foundation technical spirit of the present invention all falls within the scope of protection of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (8)
1. the rapid assay methods of fabric pH value, its step is as follows: filter paper is placed below the fabric to be measured, drip extract at fabric face, then in the extract dropping place application of force, making extract see through fabric is seeped on the filter paper, drip mixed indicator in extract dropping place then, the colour developing back is judged the pH value of fabric fast according to the color on the filter paper, described mixed indicator comprises phenolphthalein indicator, Bromothymol blue indicator, methyl red indicator and Thymol phthalein indicator, and described extract is sodium chloride, magnesium chloride or glauber salt aqueous solution.
2. the rapid assay methods of fabric pH value according to claim 1, when it is characterized in that measuring the pH value of raw white or brightened goods, need not place filter paper under the fabric, extract, mixed indicator are successively dripped same place at fabric face, directly judge the pH value of fabric fast by the situation of fabric face colour developing.
3. the rapid assay methods of fabric pH value according to claim 1 and 2, it is characterized in that being prepared as follows of described mixed indicator: phenolphthalein indicator, Bromothymol blue indicator, methyl red indicator and Thymol phthalein indicator are dissolved in the solvent, with NaOH solution the solution of gained are transferred to green again.
4. the rapid assay methods of fabric pH value according to claim 3 is characterized in that the concentration of each indicator is as follows in the mixed indicator: phenolphthalein indicator 1.0-2.0g/L, Bromothymol blue indicator 0.5-1.2g/L, methyl red indicator 0.1-1.0g/L and Thymol phthalein indicator 0.1-1.0g/L.
5. the rapid assay methods of fabric pH value according to claim 3 is characterized in that described solvent is one or more the mixed solvent in ethanol, diglycol, the ethylene glycol.
6. the rapid assay methods of fabric pH value according to claim 1 and 2 is characterized in that described extract concentration is 10-100g/L.
7. the rapid assay methods of fabric pH value according to claim 1 and 2 is characterized in that after second, judging fabric pH value by the situation of colour developing at colour developing 5-10, and when showing orange red, the pH value is 3; When the outer ring is orange red, when inner ring had yellow, the pH value was 4; When the outer ring is orange red, when inner ring had tangible yellow green, the pH value was 5; When the outer ring is a yellow green, when inner ring had a little green, the pH value was 6; When the outer ring is a yellow green, inner ring is green obviously the time, and the pH value is 7; When the outer ring green, when the inner ring green was obvious, the pH value was 8; Blackish green when the outer ring, when inner ring was green, the pH value was 9; When a little purple of outer ring, when inner ring was blackish green, the pH value was 10; Purple is obvious when the outer ring, and when inner ring was blackish green, the pH value was 11.
8. the rapid assay methods of fabric pH value according to claim 1 is characterized in that described filter paper is the middling speed qualitative filter paper.
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| CN2008100590997A CN101281140B (en) | 2008-01-10 | 2008-01-10 | Rapid measuring method of fabric pH value |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102539423B (en) * | 2011-12-16 | 2014-09-10 | 辽宁师范大学 | High-acidity precision test paper |
| CN104345055A (en) * | 2013-07-26 | 2015-02-11 | 丰益(上海)生物技术研发中心有限公司 | Mixed indicator, utilization and rapid detection method for grease acid value |
| CN103616499B (en) * | 2013-11-18 | 2015-11-04 | 中国纺织信息中心 | A kind of textile non-destructive pH value steam method of testing and testing apparatus |
| CN103616498B (en) * | 2013-11-18 | 2016-03-09 | 中国纺织信息中心 | A kind of textile non-destructive pH value method of testing and testing apparatus |
| CN103616340B (en) * | 2013-11-18 | 2015-12-02 | 中国纺织信息中心 | A kind of textile non-destructive content of formaldehyde method of testing and testing apparatus |
| CN103954620A (en) * | 2014-05-13 | 2014-07-30 | 中国人民解放军第五七一九工厂 | Method for detecting pH value of trichloro ethylene |
| CN106996931A (en) * | 2016-01-26 | 2017-08-01 | 福建大北农水产科技有限公司 | A kind of pH quick detection kits of breeding water body |
| CN108459018B (en) * | 2018-06-25 | 2023-11-28 | 中联品检(福建)检测服务有限公司 | Textile formaldehyde detection device and detection method |
| CN111624232A (en) * | 2020-06-19 | 2020-09-04 | 江阴市纤维检验所 | Method for testing rapid stability of pH meter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1501072A (en) * | 2002-11-19 | 2004-06-02 | 上海三爱思试剂有限公司 | Test paper for detecting solution PH value |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1501072A (en) * | 2002-11-19 | 2004-06-02 | 上海三爱思试剂有限公司 | Test paper for detecting solution PH value |
Non-Patent Citations (1)
| Title |
|---|
| 孙国瑞,钱进南.生产中织物pH值快速测定与控制方法.《印染》.2007,(第7期),第29页第2栏第1-14行. * |
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