CN104034725A - Rapid detection test paper for trace chromium and preparation method of rapid detection test paper - Google Patents
Rapid detection test paper for trace chromium and preparation method of rapid detection test paper Download PDFInfo
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- CN104034725A CN104034725A CN201410288583.2A CN201410288583A CN104034725A CN 104034725 A CN104034725 A CN 104034725A CN 201410288583 A CN201410288583 A CN 201410288583A CN 104034725 A CN104034725 A CN 104034725A
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Abstract
The invention provides test paper for detecting trace chromium in a sample and a preparation method of the test paper. The two surfaces of a water-absorbing material are uniformly coated with a layer of membrane liquid respectively, and the membrane liquid comprises diphenylcarbohydrazide, cellulose, a surfactant, an acidity regulator and an acetone solvent. The preparation method is easily operated, and the prepared test paper is low in cost and can rapidly detect the trace chromium in the sample on site. Meanwhile, the test paper overcomes the defects of an immersion method, the adsorbing capacity of a detection reagent on each piece of test paper can be strictly controlled, the adsorption firmness of the detection reagent is improved, and the accuracy and reproducibility of detection is improved.
Description
Technical field
The present invention relates to micro-detection technique, particularly quick detection test paper of a kind of trace chromium and preparation method thereof.
Background technology
The compound of chromium is all virose to animals and plants, and wherein chromic toxicity is maximum, and its toxicity is than almost large 100 times of trivalent chromiums.Skin contact chromium can cause sensitivity, more may cause heredity gene defect, and long-term suction also may be carcinogenic, and environment is had to lasting danger.Chromic pollution be mainly derived from that the industry such as plating, tanning, pigment, paint, alloy, printing and dyeing and printing discharges containing chromium waste gas, waste water and waste residue.
Hexavalent chromium polluted in order to control and to administer, research worker has set up the method for many mensuration trace chromiums one after another for many years.The chromium detection method of lot of documents report mainly contains spectrophotometric method, atomic absorption spectrography (AAS), plasma emission spectrometry, fluorescence quemching method and polarography etc.Spectrophotometry due to sensitive, accurate, selectivity is good and as standard method, be widely used in the analysis of chromium in sample.Can the method need well-trained professional and technical personnel to measure in laboratory, and detection time is longer, operate loaded down with trivial details, expense is higher, is not suitable for realizing field quick detection.Along with becoming increasingly conspicuous of environmental problem, people need to understand at one's side whether safety of environment in real time, as whether the heavy metals (as chromium) such as edible rice, tap water, vegetables exceed standard.Therefore the quick detection test paper of developing chromium etc. seems particularly important.
Bibliographical information several chromium ion Test papers.Liu Guoyan etc. (number of patent application 201010590486.0) have announced a kind of test strips for detection of heavy metal chromium in water quality, after this test strips colour developing, need photoelectric sensor to detect, this not only needs professional to operate, and equipment is more complicated, and making testing cost is higher.Directly, by carry out the test paper method that color contrasts convenient, quick with colorimetric card, can greatly reduce and make and testing cost.Xu Meizhen (number of patent application 02145465.5) has invented a kind of for detection of chromic test block; Wang Shengyun (number of patent application 201110249969.9) has invented a kind of test paper for detecting hexavalent chromium ions.The preparation method of these several paper of chrome,test is absorbed in several solns on sorbing material by the method for dipping, and these methods are difficult to guarantee that each mensuration liquid concentration absorbing is in full accord, and repeatability, the accuracy of mensuration are affected.
Summary of the invention
In view of the deficiencies in the prior art, the invention provides a kind of test paper for detection of trace chromium in sample and preparation method thereof.This test paper is not only prepared easily, and stability, favorable reproducibility are easy to preserve, and easy to carry, simple to operate, and making testing cost is low, can detect quickly and easily at the scene chromium ion concentration.
The present invention is achieved by the following technical solutions:
A kind of test paper for detection of trace chromium, comprise as water-absorbing material and the painting of carrier and scrape film liquid on water-absorbing material, it is characterized in that: described film liquid comprises developer, stabilizing agent, sensitizer, acidity regulator, acetone solvent, described developer is diphenylcarbazide; Described stabilizing agent is cellulose.
Described absorbent material is middling speed qualitative filter paper or rice paper or printer paper.
Described sensitizer is cetyl trimethyl ammonium bromide or lauryl sodium sulfate or neopelex; Described acidity regulator is one or more the combination in hydrochloric acid, acetic acid, sulfuric acid, phosphoric acid.
Described stabilizing agent is cellulose acetate or ethyl cellulose or acetylbutyrylcellulose.
In described film liquid, the concentration of developer is 0.06-0.08mol/l, and the concentration of stabilizing agent is 5-8wt%, and the concentration of sensitizer is 0.01-0.05mol/l, and the concentration of acidity regulator is 0.3-0.6mol/l.
The present invention also provides a kind of method of preparing the test paper that detects trace chromium, and preparation process is as follows: (1) take acetone as solvent, adds successively developer, stabilizing agent, sensitizer, acidity regulator, makes film liquid; (2) the film liquid configuring is evenly coated with and scrapes the pros and cons at water-absorbing material respectively, dry after and get final product;
Described absorbent material is middling speed qualitative filter paper or rice paper or printer paper;
Described developer is diphenylcarbazide; Described stabilizing agent is cellulose; Described sensitizer is cetyl trimethyl ammonium bromide or lauryl sodium sulfate or neopelex; Described acidity regulator is one or more the combination in hydrochloric acid, acetic acid, sulfuric acid, phosphoric acid;
In described film liquid, the concentration of developer is 0.06-0.08mol/l, and the concentration of stabilizing agent is 5-8wt%, and the concentration of sensitizer is 0.01-0.05mol/l, and the concentration of acidity regulator is 0.3-0.6mol/l.
Described stabilizing agent is cellulose acetate or ethyl cellulose or acetylbutyrylcellulose.
The present invention adopts diphenylcarbazide as developer, and the colour developing principle of utilizing hexavalent chromium and diphenylcarbazide to generate aubergine complex compound is made into chromium ion Test paper.During use, test paper immersed containing 20-30 second in sexavalent chrome liquid to be measured or drip liquid to be measured on test paper, after colour developing, indicator paper block becomes aubergine, increase along with chromium concn in liquid to be measured, aobvious color is progressively deepened as royal purple from light violet magenta, by test paper and standard color card contrast, according to the depth of color, realize the detection to content of chromium ion again.
Advantage of the present invention is: utilize cellulose as stabilizing agent, can be by developer embedding, then adopt two-sided mode of filming, and can quantitatively control the adsorbance of developer on test paper, make the amount of the developer on every test paper consistent.This test paper records chromic content in a short period of time, and detectability reaches 3mg/l.The preparation of this test paper is simple, uses easy and simple to handlely, is particularly suitable for fast-field evaluation, easy to carry, stability, favorable reproducibility.
Accompanying drawing explanation
Fig. 1 is the standard color range for detection of trace chromium test paper of the embodiment of the present invention 1,2;
Fig. 2 is the standard color range for detection of trace chromium test paper of the embodiment of the present invention 3,4.
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Embodiment
Below by embodiment, further illustrate the present invention.It should be understood that the embodiment of the present invention is only used for illustrating the present invention, rather than limitation of the present invention, under design prerequisite of the present invention, preparation method's of the present invention simple modifications is all belonged to the scope of protection of present invention.
embodiment 1. with middling speed qualitative filter paper, as water-absorbing material, described in general preparation method, prepare test paper.
Get 0.1845g diphenylcarbazide and dissolve in 10g acetone, add until completely dissolved 0.5366g cellulose acetate, make film liquid.In film liquid, comprise diphenylcarbazide 0.060mol/l, cellulose acetate 5wt%.
Add cetyl trimethyl ammonium bromide, making its concentration is 0.01 mol/l.
With analysis pure hydrochloric acid, be added dropwise to that in film liquid, to make its concentration be 0.3 mol/l.
Get middling speed qualitative filter paper 11 .0 * 16.0cm and be laid on glass plate, with glass bar, the film liquid having prepared is evenly scraped on filter paper surface.After filter paper lucifuge is dry, with glass bar, film liquid is evenly coated with and is scraped at filter paper another side.Treat that filter paper is dry, the small pieces that cut into suitable dimension obtain a kind of Test paper of trace chromium.
The Test paper of making is placed in sealing bag in the moistureproof preservation of lucifuge.
During detection, test paper is immersed and taken out afterwards in chromium liquid to be measured 30 seconds, after 2 minutes, by test paper and standard color card contrast, according to the depth of color, determine content of chromium ion.
embodiment 2. with middling speed qualitative filter paper, as water-absorbing material, described in general preparation method, prepare test paper.
Get 0.2102g diphenylcarbazide and dissolve in 10g acetone, add until completely dissolved 0.6700g cellulose acetate, make film liquid.In film liquid, comprise diphenylcarbazide 0.068mol/l, cellulose acetate 6wt%.
Add cetyl trimethyl ammonium bromide, making its concentration is 0.02 mol/l.
With analysis pure hydrochloric acid, be added dropwise to that in film liquid, to make sour concentration be 0.4 mol/l.
Get middling speed qualitative filter paper 11 .0 * 16.0cm and be laid on glass plate, with glass bar, the film liquid having prepared is evenly scraped on filter paper surface.After filter paper lucifuge is dry, with glass bar, film liquid is evenly coated with and is scraped at filter paper another side.Treat that filter paper is dry, the small pieces that cut into suitable dimension obtain a kind of Test paper of trace chromium.
The Test paper of making is placed in sealing bag in the moistureproof preservation of lucifuge.
During detection, test paper is immersed and taken out afterwards in chromium liquid to be measured 30 seconds, after 2 minutes, by test paper and standard color card contrast, according to the depth of color, determine content of chromium ion.
embodiment 3.with A4 printer paper, as water-absorbing material, described in general preparation method, prepare test block.
Get 0.2306g diphenylcarbazide and dissolve in 10g acetone, add until completely dissolved 0.7512g acetylbutyrylcellulose, make film liquid.In this solution, comprise diphenylcarbazide 0.075 mol/l, cellulose acetate 7wt%.
Add cetyl benzene sulfonic acid sodium salt, it is 0.03 mol/l to make concentration.
With analyzing pure acetic acid, be added dropwise to that in film liquid, to make sour concentration be 0.5 mol/l.
Get A4 printer paper and be laid on glass plate, with glass bar, the film liquid having prepared is evenly scraped in printer paper one side, after paper to be printed dries, with glass bar, the film liquid having prepared is evenly scraped at printer paper opposite side.After paper to be printed is dry, with glass bar, the hydrochloric acid solution having prepared is evenly coated in to printer paper one side, is coated in another side after to be dried.Paper to be printed is dry, cuts into the Test paper that 0.9 * 3.7cm small pieces obtain a kind of trace chromium.
The Test paper of making is placed in sealing bag in the moistureproof preservation of lucifuge.
During detection, drop to be measured is added on test paper, after 2 minutes, by test paper and standard color card contrast, according to the depth of color, determines content of chromium ion.
embodiment 4.with rice paper, as water-absorbing material, described in general preparation method, prepare test paper.
Get 0.406g diphenylcarbazide and dissolve in 10g acetone, add until completely dissolved 0.8585g ethyl cellulose, make film liquid.In this solution, comprise diphenylcarbazide 0.080 mol/l, ethyl cellulose 8wt%.
Add sodium hexadecyl sulfate, making its concentration is 0.05 mol/l.
With the acid mixture of analytical pure sulfuric acid and phosphoric acid, be added dropwise to that in film liquid, to make sour concentration be 0.6mol/l.
Get rice paper 11 .0 * 16.0cm and be laid on glass plate, with glass bar, the film liquid having prepared is evenly scraped on rice paper surface.After rice paper is dry, with glass bar, film liquid is evenly coated with and is scraped at rice paper another side.Treat that rice paper is dry, the small pieces that cut into suitable dimension obtain a kind of Test paper of trace chromium.
The Test paper of making is placed in sealing bag in the moistureproof preservation of lucifuge.
During detection, drop to be measured is added on test paper, after 2 minutes, by test paper and standard color card contrast, according to the depth of color, determines content of chromium ion.
Claims (10)
1. for detection of a test paper for trace chromium, comprise as water-absorbing material and the painting of carrier and scrape the film liquid on water-absorbing material, it is characterized in that: in described film liquid, include developer, stabilizing agent, sensitizer, acidity regulator, acetone solvent; Described developer is diphenylcarbazide; Described stabilizing agent is cellulose.
2. the test paper for detection of trace chromium as claimed in claim 1, is characterized in that: described absorbent material is middling speed qualitative filter paper or rice paper or printer paper.
3. the test paper for detection of trace chromium as claimed in claim 1, is characterized in that: described sensitizer is cetyl trimethyl ammonium bromide or lauryl sodium sulfate or neopelex; Described acidity regulator is one or more the combination in hydrochloric acid, acetic acid, sulfuric acid, phosphoric acid.
4. the test paper for detection of trace chromium as claimed in claim 1, is characterized in that: described cellulose is cellulose acetate or ethyl cellulose or acetylbutyrylcellulose.
5. the test paper as described in as arbitrary in claim 1-4, it is characterized in that: in described film liquid, the concentration of developer is 0.06-0.08mol/l, the concentration of stabilizing agent is 5-8wt%, and the concentration of sensitizer is 0.01-0.05mol/l, and the concentration of acidity regulator is 0.3-0.6mol/l.
6. a method of preparing the test paper of detection trace chromium as claimed in claim 1, is characterized in that: preparation process is as follows: (1) take acetone as solvent, adds successively developer, stabilizing agent, sensitizer, acidity regulator, makes film liquid; (2) the film liquid configuring is evenly coated with and scrapes the pros and cons at water-absorbing material respectively, dry after and get final product, wherein said developer is diphenylcarbazide; Described stabilizing agent is cellulose.
7. preparation as claimed in claim 6 detects the method for the test paper of trace chromium, it is characterized in that: described absorbent material is middling speed qualitative filter paper or rice paper or printer paper.
8. preparation as claimed in claim 6 detects the method for the test paper of trace chromium, it is characterized in that: described sensitizer is cetyl trimethyl ammonium bromide or lauryl sodium sulfate or neopelex; Described acidity regulator is one or more the combination in hydrochloric acid, acetic acid, sulfuric acid, phosphoric acid.
9. preparation as claimed in claim 6 detects the method for the test paper of trace chromium, it is characterized in that: in described film liquid, the concentration of developer is 0.06-0.08mol/l, the concentration of stabilizing agent is 5-8wt%, the concentration of sensitizer is 0.01-0.05mol/l, and the concentration of acidity regulator is 0.3-0.6mol/l.
10. the test paper for detection of trace chromium as claimed in claim 6, is characterized in that: described stabilizing agent is cellulose acetate or ethyl cellulose or acetylbutyrylcellulose.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410288583.2A CN104034725B (en) | 2014-06-25 | A kind of quick detection test paper of trace chromium and preparation method thereof |
Applications Claiming Priority (1)
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| CN201410288583.2A CN104034725B (en) | 2014-06-25 | A kind of quick detection test paper of trace chromium and preparation method thereof |
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| CN104034725A true CN104034725A (en) | 2014-09-10 |
| CN104034725B CN104034725B (en) | 2016-11-30 |
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Cited By (8)
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| CN104792777A (en) * | 2015-01-16 | 2015-07-22 | 深圳市环境科学研究院 | An economical and rapid type test pack for colorimetric determination of a concentration of hexavalent chromium in water and a determination method |
| CN105424686A (en) * | 2015-11-10 | 2016-03-23 | 广东环凯微生物科技有限公司 | Rapid total chromium concentration detecting reagent and method |
| CN106370652A (en) * | 2016-11-03 | 2017-02-01 | 百奥森（江苏）食品安全科技有限公司 | Azide quick detection test paper in feed and preparation method thereof |
| CN106404783A (en) * | 2016-09-29 | 2017-02-15 | 网易（杭州）网络有限公司 | Test paper detection method and device |
| CN107764814A (en) * | 2017-09-27 | 2018-03-06 | 安徽朗德生物科技有限公司 | A kind of fecal occult blood test test paper coating process flow |
| CN108693330A (en) * | 2018-05-08 | 2018-10-23 | 河南省林业科学研究院 | Using the time as coordinate half-quantitative detection soil in chromium content device and preparation method thereof |
| CN110672540A (en) * | 2019-11-19 | 2020-01-10 | 长春黄金研究院有限公司 | Method for determining hexavalent chromium in solid waste |
| CN114002214A (en) * | 2021-09-28 | 2022-02-01 | 中国农业科学院油料作物研究所 | Test strip for detecting valence of edible oil, preparation method and application thereof |
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Cited By (12)
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|---|---|---|---|---|
| CN104792777A (en) * | 2015-01-16 | 2015-07-22 | 深圳市环境科学研究院 | An economical and rapid type test pack for colorimetric determination of a concentration of hexavalent chromium in water and a determination method |
| CN105424686A (en) * | 2015-11-10 | 2016-03-23 | 广东环凯微生物科技有限公司 | Rapid total chromium concentration detecting reagent and method |
| CN105424686B (en) * | 2015-11-10 | 2018-10-12 | 广东环凯微生物科技有限公司 | A kind of total chromium concn quick detection reagent and detection method |
| CN106404783A (en) * | 2016-09-29 | 2017-02-15 | 网易（杭州）网络有限公司 | Test paper detection method and device |
| CN106404783B (en) * | 2016-09-29 | 2019-07-30 | 网易（杭州）网络有限公司 | Test paper detecting method and device |
| CN106370652A (en) * | 2016-11-03 | 2017-02-01 | 百奥森（江苏）食品安全科技有限公司 | Azide quick detection test paper in feed and preparation method thereof |
| CN107764814A (en) * | 2017-09-27 | 2018-03-06 | 安徽朗德生物科技有限公司 | A kind of fecal occult blood test test paper coating process flow |
| CN108693330A (en) * | 2018-05-08 | 2018-10-23 | 河南省林业科学研究院 | Using the time as coordinate half-quantitative detection soil in chromium content device and preparation method thereof |
| CN108693330B (en) * | 2018-05-08 | 2019-09-06 | 河南省林业科学研究院 | Using the time as the device and preparation method thereof of chromium content in coordinate half-quantitative detection soil |
| CN110672540A (en) * | 2019-11-19 | 2020-01-10 | 长春黄金研究院有限公司 | Method for determining hexavalent chromium in solid waste |
| CN114002214A (en) * | 2021-09-28 | 2022-02-01 | 中国农业科学院油料作物研究所 | Test strip for detecting valence of edible oil, preparation method and application thereof |
| CN114002214B (en) * | 2021-09-28 | 2024-01-16 | 中国农业科学院油料作物研究所 | Edible oleic acid value detection test strip, preparation method and application thereof |
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