CN103558245A - Method for quickly determining trace moisture in aromatic solvent - Google Patents
Method for quickly determining trace moisture in aromatic solvent Download PDFInfo
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- CN103558245A CN103558245A CN201310500837.8A CN201310500837A CN103558245A CN 103558245 A CN103558245 A CN 103558245A CN 201310500837 A CN201310500837 A CN 201310500837A CN 103558245 A CN103558245 A CN 103558245A
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Abstract
The invention relates to a method for determining moisture in an aromatic solvent, in particular relates to a method for quickly determining trace moisture in the aromatic solvent, belonging to the field of testing of moisture content in the aromatic solvent. The method for quickly determining trace moisture in the aromatic solvent comprises the following steps: (1) adding the aromatic solvent to be determined into a transparent experimental container, and then sealing the transparent experimental container; (2) freezing the transparent experimental container added with the aromatic solvent in freezing equipment for at least two minutes, and then taking out the transparent experimental container; (3) after the transparent experimental container is taken out, visually observing the aromatic solvent in the transparent experimental container within 5 to 10 seconds, quickly judging whether the water content of the aromatic solvent, determined at this time, is qualified by observing whether water drops or ice crystals are generated on the inner wall of the transparent experimental container positioned at the bottom of the aromatic solvent, if the water drops or the ice crystals are generated, determining that the water content of the aromatic solvent, determined at this time, is unqualified, and if the water drops or the ice crystals are not generated, determining that the water content of the aromatic solvent, determined at this time, is qualified.
Description
Technical field
The present invention relates to measure the method for moisture in aromatic solvent, the particularly method of micro-moisture in Fast Measurement aromatic solvent, the invention belongs to the field tests of moisture in aromatic solvent.
Background technology
Along with the develop rapidly of chemical industry, the use of aromatic solvent is also more and more extensive, particularly paints industry, if the defective product quality that will affect paint application of the water percentage of aromatic solvent.At present, the method for measuring moisture in aromatic solvent is a lot, such as having spectrum, chromatography, karl Fischer coulometry, but these method apparatus expensive, and the test duration is very long, incurs loss through delay production efficiency.
Summary of the invention
The method that the invention provides micro-moisture in a kind of Fast Measurement aromatic solvent, the method instrument and equipment is cheap, and the test duration is short, simple to operation, can effectively enhance productivity.
Technical solution of the present invention is as follows:
In Fast Measurement aromatic solvent, a method for micro-moisture, comprises the steps:
1) get aromatic solvent to be determined and add in transparent experiment container, afterwards sealed transparent experiment container;
2) the transparent experiment container that adds aromatic solvent is put into freezing equipment freezing, freezing at least 2 minutes, then take out;
3) take out after at 5-10 aromatic solvent in the transparent experiment container of visual observations in second, whether the transparent experiment container inwall that is positioned at aromatic solvent bottom by observation occurs that the globule or ice crystal judge that whether the aromatic solvent water percentage of this mensuration is qualified fast, when there is the globule or ice crystal, the aromatic solvent water percentage that this mensuration is described is defective, when there is not the globule or ice crystal, illustrate that the aromatic solvent water percentage of this mensuration is qualified.
In addition, technique scheme of the present invention is also further improved as follows:
Described transparent experiment container is common use for laboratory 10ml to 250ml simple glass conical flask, and the bottleneck of simple glass conical flask is furnished with the grinding port plug of corresponding size; Freezing equipment can be the common domestic type refrigerator with refrigerating chamber, and the refrigerating effect of described freezing equipment is-1 ℃ to-18 ℃,
Step 1) aromatic solvent addition to be determined is 1/4 to 1/2 of described glass conical flask volume.
Step 2) cooling time is 2 to 3 minutes, after taking out, with clean soft cloth, transparent experiment container appearance is wiped clean, and prevents from being attached to glass conical flask appearance after the water vapor condensation in environment, affects the observing effect of step 3).
This method contrasts the method for moisture in traditional mensuration aromatic solvent, such as having spectrum, chromatography, karl Fischer coulometry, has the following advantages:
1) instrument and equipment is cheap, only needs the glass conical flask of common use for laboratory band grinding port plug and the common domestic type refrigerator with refrigerating chamber, without purchasing specially expensive instrument and equipment.
2) test duration short, in several minutes, just can test a collection of product.
3) simple to operation, without special training personnel operational testing process.
4) can effectively enhance productivity, adopt this method of testing once can test multiple batches of product simultaneously, obviously promote work efficiency
Embodiment
Embodiment 1
In Fast Measurement aromatic solvent, a method for micro-moisture, comprises the steps:
1) aromatic solvent to be determined is added in common use for laboratory 50ml simple glass conical flask, adding quantity of solvent is 1/2 of glass conical flask volume, with the grinding port plug seal glass conical flask of the bottleneck size of corresponding simple glass conical flask;
2) the glass conical flask that adds aromatic solvent is put into the common domestic type refrigerator and cooled with refrigerating chamber and frozen, the refrigerating effect of refrigerating chamber is-10 ℃, takes out, then with clean soft cloth, glass conical flask appearance is wiped clean after 2 minutes;
3) transparency of aromatic solvent in sight glass conical flask in 5 seconds, by observing the glass conical flask inwall of solvent bottom, whether occur that the crystallization globule judges that whether the aromatic solvent water percentage of this mensuration is qualified fast, when there is the globule or ice crystal, the aromatic solvent water percentage that this mensuration is described is defective, when there is not the globule or ice crystal, illustrate that the aromatic solvent water percentage of this mensuration is qualified.
Embodiment 2
In Fast Measurement aromatic solvent, a method for micro-moisture, comprises the steps:
1) aromatic solvent to be determined is added in common use for laboratory 10ml simple glass conical flask, adding quantity of solvent is 1/4 of glass conical flask volume, with the grinding port plug seal glass conical flask of the bottleneck size of corresponding simple glass conical flask;
2) the glass conical flask that adds aromatic solvent is put into the common domestic type refrigerator and cooled with refrigerating chamber and frozen, the refrigerating effect of refrigerating chamber is-15 ℃, takes out, then with clean soft cloth, glass conical flask appearance is wiped clean after 3 minutes;
3) transparency of aromatic solvent in sight glass conical flask in 10 seconds, by observing the glass conical flask inwall of solvent bottom, whether occur that the crystallization globule judges that whether the aromatic solvent water percentage of this mensuration is qualified fast, when there is the globule or ice crystal, the aromatic solvent water percentage that this mensuration is described is defective, when there is not the globule or ice crystal, illustrate that the aromatic solvent water percentage of this mensuration is qualified.
Embodiment 3
In Fast Measurement aromatic solvent, a method for micro-moisture, comprises the steps:
1) aromatic solvent to be determined is added in common use for laboratory 100ml simple glass conical flask, adding quantity of solvent is 1/2 of glass conical flask volume, with the grinding port plug seal glass conical flask of the bottleneck size of corresponding simple glass conical flask;
2) the glass conical flask that adds aromatic solvent is put into the common domestic type refrigerator and cooled with refrigerating chamber and frozen, the refrigerating effect of refrigerating chamber is-1 ℃, takes out, then with clean soft cloth, glass conical flask appearance is wiped clean after 3 minutes;
3) transparency of aromatic solvent in sight glass conical flask in 8 seconds, by observing the glass conical flask inwall of solvent bottom, whether occur that the crystallization globule judges that whether the aromatic solvent water percentage of this mensuration is qualified fast, when there is the globule or ice crystal, the aromatic solvent water percentage that this mensuration is described is defective, when there is not the globule or ice crystal, illustrate that the aromatic solvent water percentage of this mensuration is qualified.
Embodiment 4
In Fast Measurement aromatic solvent, a method for micro-moisture, comprises the steps:
1) aromatic solvent to be determined is added in common use for laboratory 250ml simple glass conical flask, adding quantity of solvent is 1/2 of glass conical flask volume, with the grinding port plug seal glass conical flask of the bottleneck size of corresponding simple glass conical flask;
2) the glass conical flask that adds aromatic solvent is put into the common domestic type refrigerator and cooled with refrigerating chamber and frozen, the refrigerating effect of refrigerating chamber is-18 ℃, takes out, then with clean soft cloth, glass conical flask appearance is wiped clean after 2 minutes;
3) transparency of aromatic solvent in sight glass conical flask in 5 seconds, by observing the glass conical flask inwall of solvent bottom, whether occur that the crystallization globule judges that whether the aromatic solvent water percentage of this mensuration is qualified fast, when there is the globule or ice crystal, the aromatic solvent water percentage that this mensuration is described is defective, when there is not the globule or ice crystal, illustrate that the aromatic solvent water percentage of this mensuration is qualified.
Embodiment 5
In Fast Measurement aromatic solvent, a method for micro-moisture, comprises the steps:
1) aromatic solvent to be determined is added in common use for laboratory 150ml simple glass conical flask, adding quantity of solvent is 1/3 of glass conical flask volume, with the grinding port plug seal glass conical flask of the bottleneck size of corresponding simple glass conical flask;
2) the glass conical flask that adds aromatic solvent is put into the common domestic type refrigerator and cooled with refrigerating chamber and frozen, the refrigerating effect of refrigerating chamber is-5 ℃, within 2 minutes 30 seconds, takes out afterwards, then with clean soft cloth, glass conical flask appearance is wiped clean;
3) transparency of aromatic solvent in sight glass conical flask in 10 seconds, by observing the glass conical flask inwall of solvent bottom, whether occur that the crystallization globule judges that whether the aromatic solvent water percentage of this mensuration is qualified fast, when there is the globule or ice crystal, the aromatic solvent water percentage that this mensuration is described is defective, when there is not the globule or ice crystal, illustrate that the aromatic solvent water percentage of this mensuration is qualified.
Above-mentioned embodiment is just explained in detail technical scheme of the present invention; the present invention has more than and is only confined to above-described embodiment; those skilled in the art should be understood that; the above-mentioned principle of every foundation and the improvement of spirit on basis of the present invention, substitute, all should be within protection scope of the present invention.
Claims (4)
1. a method for micro-moisture in Fast Measurement aromatic solvent, is characterized in that, described method comprises the steps:
1) get aromatic solvent to be determined and add in transparent experiment container, afterwards sealed transparent experiment container;
2) the transparent experiment container that adds aromatic solvent is put into freezing equipment freezing, freezing at least 2 minutes, then take out;
3) take out after at 5-10 aromatic solvent in the transparent experiment container of visual observations in second, whether the transparent experiment container inwall that is positioned at aromatic solvent bottom by observation occurs that the globule or ice crystal judge that whether the aromatic solvent water percentage of this mensuration is qualified fast, when there is the globule or ice crystal, the aromatic solvent water percentage that this mensuration is described is defective, when there is not the globule or ice crystal, illustrate that the aromatic solvent water percentage of this mensuration is qualified.
2. method according to claim 1, is characterized in that: described transparent experiment container is common use for laboratory 10ml to 250ml simple glass conical flask, and the bottleneck of simple glass conical flask is furnished with the grinding port plug of corresponding size; The chilling temperature of described freezing equipment is-1 ℃ to-18 ℃.
3. method according to claim 2, is characterized in that: step 1) aromatic solvent addition to be determined is 1/4 to 1/2 of described glass conical flask volume.
4. method according to claim 1, is characterized in that: step 2) cooling time is 2 to 3 minutes, after taking out, with clean soft cloth, transparent experiment container appearance wiped clean.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310500837.8A CN103558245A (en) | 2013-10-22 | 2013-10-22 | Method for quickly determining trace moisture in aromatic solvent |
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| CN201310500837.8A CN103558245A (en) | 2013-10-22 | 2013-10-22 | Method for quickly determining trace moisture in aromatic solvent |
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Citations (5)
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| EP1245951A1 (en) * | 2001-03-30 | 2002-10-02 | Korporam B.V. | Method and measuring system for determining the crystal fraction in a crystal suspension mixture |
| CN202018432U (en) * | 2010-12-31 | 2011-10-26 | 上海市向明中学 | Device for identifying illegal cooking oil by cooling in water |
| CN202486079U (en) * | 2012-03-22 | 2012-10-10 | 中国石油大学(北京) | Condensing unit for measuring oil-water ash content in gas |
| CN202994695U (en) * | 2012-11-15 | 2013-06-12 | 山东泰德新能源有限公司 | Detection device for water content in coal tar |
| CN203178223U (en) * | 2013-04-15 | 2013-09-04 | 中国石油化工股份有限公司 | Device for determining free water in liquefied petroleum gas |
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2013
- 2013-10-22 CN CN201310500837.8A patent/CN103558245A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1245951A1 (en) * | 2001-03-30 | 2002-10-02 | Korporam B.V. | Method and measuring system for determining the crystal fraction in a crystal suspension mixture |
| CN202018432U (en) * | 2010-12-31 | 2011-10-26 | 上海市向明中学 | Device for identifying illegal cooking oil by cooling in water |
| CN202486079U (en) * | 2012-03-22 | 2012-10-10 | 中国石油大学(北京) | Condensing unit for measuring oil-water ash content in gas |
| CN202994695U (en) * | 2012-11-15 | 2013-06-12 | 山东泰德新能源有限公司 | Detection device for water content in coal tar |
| CN203178223U (en) * | 2013-04-15 | 2013-09-04 | 中国石油化工股份有限公司 | Device for determining free water in liquefied petroleum gas |
Non-Patent Citations (2)
| Title |
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| LUIGI RAGNI ET AL.: "A capacitive technique to assess water content in extra virgin olive oils", 《JOURNAL OF FOOD ENGINEERING》 * |
| 曾安等: "红外光谱法检测润滑油中水分含量的研究", 《润滑与密封》 * |
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Application publication date: 20140205 |