CN108663291A - Two-phase sample injector for rotary drop interfacial tension meter and use method thereof - Google Patents
Two-phase sample injector for rotary drop interfacial tension meter and use method thereof Download PDFInfo
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- CN108663291A CN108663291A CN201810849984.9A CN201810849984A CN108663291A CN 108663291 A CN108663291 A CN 108663291A CN 201810849984 A CN201810849984 A CN 201810849984A CN 108663291 A CN108663291 A CN 108663291A
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- density phase
- injector
- low
- density
- phase
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000002347 injection Methods 0.000 claims abstract description 80
- 239000007924 injection Substances 0.000 claims abstract description 80
- 238000009987 spinning Methods 0.000 claims abstract description 16
- 238000005070 sampling Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 5
- 239000012071 phase Substances 0.000 description 139
- 239000003350 kerosene Substances 0.000 description 9
- YRIUSKIDOIARQF-UHFFFAOYSA-N dodecyl benzenesulfonate Chemical compound CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 YRIUSKIDOIARQF-UHFFFAOYSA-N 0.000 description 7
- 229940071161 dodecylbenzenesulfonate Drugs 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 239000004094 surface-active agent Substances 0.000 description 7
- 239000007791 liquid phase Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/02—Investigating surface tension of liquids
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a two-phase sample injector for a spinning drop interfacial tension meter and a using method thereof, wherein the two-phase sample injector comprises a high-density phase injector (1), a low-density phase injector (2) and a double-end sample injection needle (3); wherein, the outlet of the high-density phase injector (1) is communicated with the high-density phase injection end (4) of the double-end injection needle (3), and the outlet of the low-density phase injector (2) is communicated with the low-density phase injection end (7) of the double-end injection needle (3). Compared with the existing sample injector, the use method of the invention has the characteristics that the sample injection amount of the low-density phase is controllable, the bubble interference can be effectively avoided, the operation is simple and convenient, and the sample injection efficiency is high.
Description
Technical Field
The invention belongs to the field of analysis and detection equipment, and particularly relates to a two-phase sample injector for a spinning drop interfacial tension meter and a using method thereof.
Background
The rotating drop interfacial tensiometer is an instrument for measuring liquid/liquid interfacial tension and liquid/gas surface tension, and can calculate the corresponding interfacial (surface) surface tension by analyzing the outline profile of one liquid phase or gas phase (low-density phase) in another immiscible liquid phase (high-density phase) under the condition of overcoming the centrifugal force and weight loss, and has the advantages of high precision, wide measurement range and the like, and can be widely applied to the fields of petroleum, chemical industry, pharmacy, food and the like.
The injector is an important component of the spinning drop interfacial tension instrument, the injector applied to the spinning drop interfacial tension instrument at present is a common syringe injector, and the sample injection process is as follows: filling the high-density phase into the test tube, then dripping the low-density phase, and finally filling the high-density phase for sealing.
The sample injector and the sample injection process have the following problems in the use process: firstly, the size of the injected liquid drop is not easy to control when the low-density phase is injected, so that the liquid drop of the low-density phase is extremely easy to cause overlarge or undersize, and the accuracy of a test result is influenced; secondly, when the low-density phase is a liquid phase, bubbles are easily mixed during sample injection, the accuracy of a test result is influenced, and even misjudgment is easily caused; thirdly, the low-density phase is easy to adhere to the inner wall of the sealing cap of the test tube when the test tube is sealed, so that the sample is frequently reloaded, and the working efficiency is influenced.
Disclosure of Invention
The invention aims to provide a two-phase sample injector for a spinning drop interfacial tension meter, which has the advantages of controllable size of low-density phase sample injection liquid drops, capability of effectively avoiding bubble interference, simplicity and convenience in operation and high sample injection efficiency, and a using method thereof.
The invention is realized by adopting the following technical scheme:
a two-phase sample injector for a rotary drop interfacial tension meter comprises a high-density phase injector, a low-density phase injector and a double-end sample injection needle head; wherein,
the outlet of the high-density phase injector is communicated with the high-density phase sample injection end of the double-end sample injection needle, and the outlet of the low-density phase injector is communicated with the low-density phase sample injection end of the double-end sample injection needle.
The invention has the further improvement that the double-end sample injection needle comprises a circular expanding cavity, a high-density phase sample injection needle and a low-density phase sample injection needle; the outlet of the high-density phase sample introduction end is communicated with a first inlet of the high-density phase sample introduction end, the outlet of the low-density phase sample introduction end is communicated with an inlet of a low-density phase sample introduction needle, the outlet of the low-density phase sample introduction needle is communicated with a second inlet of the high-density phase sample introduction end, and the outlet of the high-density phase sample introduction end is communicated with an inlet of the high-density phase sample introduction needle.
The invention has the further improvement that the low-density phase sample injection needle is connected with the circular expanding cavity, the needle tip is inserted into the circular expanding cavity, and the needle tip of the low-density phase sample injection needle and the needle tip of the high-density sample injection needle are in the same horizontal direction in the circular expanding cavity.
A further improvement of the invention is that the high density phase injector is a conventional injector.
The invention is further improved in that the low-density phase injector is a micro injector with the specification of less than or equal to 50 uL.
A method of using a two-phase sample injector for a spinning-drop interfacial tensiometer, comprising the steps of:
filling a high-density phase in a high-density phase injector, filling a low-density phase in a low-density phase injector, inserting the high-density phase injector into a high-density phase sample injection end, and inserting the low-density phase injector into a low-density phase sample injection end;
pushing the high-density phase injector until the high-density phase flows out from the outlet end of the high-density phase injection needle and no bubbles emerge;
thirdly, pushing the low-density phase injector to the bottom to enable the low-density phase in the low-density phase injector to completely enter the low-density phase sample injection needle, then filling the low-density phase injector with the low-density phase again and inserting the low-density phase injector into the low-density phase sample injection end;
fourthly, pushing the high-density phase injector until the low-density phase appears at the outlet end of the needle point of the high-density phase injection needle and is arranged side by side; if the high-density phase in the high-density phase injector is pushed to be more than 2 ml, the low-density phase at the outlet end of the needle point of the high-density phase sampling needle cannot be found, the third step is repeated until the low-density phase at the outlet end of the needle point of the high-density phase sampling needle is abreast arranged to be complete;
fifthly, inserting the high-density phase sample injection needle into the test tube of the rotary drop interfacial tension meter, and pushing the high-density phase injector to fill or partially enter the high-density phase into the test tube;
and sixthly, properly pushing the low-density phase injector, then pushing the high-density phase injector to enable the high-density phase to push the low-density phase on the needle point of the low-density phase sampling needle in the circular expanding cavity into the test tube, and continuously pushing the high-density phase injector until the high-density phase is filled in the test tube, wherein the low-density phase is suspended in the high-density phase in the test tube in the form of liquid drops or bubbles.
The invention is further improved in that the method also comprises the following steps:
and seventhly, slowly withdrawing the high-density phase sample injection needle, covering a test tube sealing cap, and screwing down to finish the sample injection process.
The invention has the following beneficial technical effects:
the invention relates to a two-phase sample injector for a rotary drop interface tensiometer, which adopts the design that a high-density phase and a low-density phase are injected into a test tube from the same needle point (the needle point of a high-density phase sample injection needle), and a micro-injector is used for injecting the low-density phase.
The two-phase sample injector for the spinning drop interfacial tension meter is suitable for filling a low-density phase and a high-density phase when the spinning drop interfacial tension meter measures liquid/liquid interfacial tension and liquid/gas surface tension.
Drawings
FIG. 1 is a schematic diagram of the two-phase sample injector for a spinning drop interfacial tensiometer according to the present invention.
Fig. 2 is a schematic structural view of the double-ended sampling needle of the present invention.
Description of reference numerals: 1-high density phase injector; 2-low density phase injector; 3-double-end sample injection needle; 4-high density phase sample introduction end; 5-circular expanding cavity; 6-high density phase sample injection needle; 7-low density phase sample introduction end; 8-low density phase injection needle.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the two-phase sample injector for spinning drop interfacial tension apparatus provided by the present invention comprises a high-density phase injector 1, a low-density phase injector 2 and a double-ended injection needle 3. Wherein the high-density phase injector 1 is connected with the high-density phase injection end 4, and the low-density phase injector 2 is connected with the low-density phase injection end 7.
The double-end sample injection needle head 3 consists of a high-density phase sample injection end 4, a circular expanded cavity 5, a high-density phase sample injection needle 6, a low-density phase sample injection end 7 and a low-density phase sample injection needle 8. Wherein the high-density phase sample injection needle 6 is connected with the high-density phase sample injection end 5, and the low-density phase sample injection needle 8 is connected with the low-density phase sample injection end 7.
The low-density phase sample injection needle 8 is connected with the circular expanding cavity 5, the needle tip of the low-density phase sample injection needle is inserted into the circular expanding cavity 5, and the needle tip of the low-density phase sample injection needle 8 and the needle tip of the high-density sample injection needle 6 are in the same horizontal direction in the circular expanding cavity 5.
The high-density phase injector 1 is a common injector and has the specification of 10 mL.
The low-density phase injector 2 is a micro injector and has the specification of 25 uL.
The invention provides a use method of a two-phase sample injector for a spinning drop interfacial tension meter, which comprises the following steps:
the invention relates to a two-phase sample injector for a spinning drop interfacial tensiometer, which aims at the sample injection method for measuring the interfacial tension of kerosene and dodecyl benzene sulfonate surfactant solution by using the spinning drop interfacial tensiometer, and comprises the following steps:
firstly, filling a dodecyl benzene sulfonate surfactant solution into a high-density phase injector 1, filling kerosene into a low-density phase injector 2, then inserting the high-density phase injector 1 into a high-density phase sample injection end 4, and inserting the low-density phase injector 2 into a low-density phase sample injection end 7.
And secondly, pushing the high-density phase injector 1 until the dodecyl benzene sulfonate surfactant solution flows out from the outlet end of the high-density phase sampling needle 6 and no bubbles emerge.
And thirdly, pushing the low-density phase injector 2 to the bottom, so that the kerosene in the low-density phase injector 2 completely enters the low-density phase sample injection needle 8, and then filling the low-density phase injector 2 with the kerosene again.
And fourthly, pushing the high-density phase injector 1 until kerosene is discharged from the outlet end of the needle point of the high-density phase sample injection needle 6. If more than 2 ml of the dodecylbenzene sulfonate surfactant solution in the high-density phase injector 1 is pushed, the kerosene is not appeared at the needle tip outlet end of the high-density phase sampling needle 6, the third step is repeated until the kerosene is appeared at the needle tip outlet end of the high-density phase sampling needle 6 and the kerosene is discharged completely.
And fifthly, inserting the high-density phase sample injection needle 6 into a test tube of the rotary drop interfacial tension meter, and pushing the high-density phase injector 1 until the dodecyl benzene sulfonate surfactant solution in the test tube is filled in half of the volume of the test tube.
And sixthly, pushing the low-density phase injector 2 for two grids (the pushing distance is determined according to the sampling amount of different low-density phases), then pushing the high-density phase injector 1 to enable the dodecyl benzene sulfonate surfactant solution to push kerosene oil drops on the needle point of the low-density phase sampling needle 8 in the circular expanding cavity 5 into the test tube, and continuously pushing the high-density phase injector 1 until the dodecyl benzene sulfonate surfactant solution is filled in the test tube.
And seventhly, slowly withdrawing the high-density phase sample injection needle 6, covering a test tube sealing cap, and screwing down to finish the sample injection process.
Claims (7)
1. A two-phase sample injector for a rotary drop interfacial tension meter is characterized by comprising a high-density phase injector (1), a low-density phase injector (2) and a double-end sample injection needle (3); wherein,
the outlet of the high-density phase injector (1) is communicated with the high-density phase injection end (4) of the double-end injection needle (3), and the outlet of the low-density phase injector (2) is communicated with the low-density phase injection end (7) of the double-end injection needle (3).
2. The two-phase sample injector for spinning drop interfacial tensiometer according to claim 1, characterized in that the double-ended sample injection needle (3) comprises a circular expanding cavity (5), a high-density phase sample injection needle (6) and a low-density phase sample injection needle (8); wherein, the outlet of the high-density phase sample introduction end (4) is communicated with the first inlet of the high-density phase sample introduction end (5), the outlet of the low-density phase sample introduction end (7) is communicated with the inlet of the low-density phase sample introduction needle (8), the outlet of the low-density phase sample introduction needle (8) is communicated with the second inlet of the high-density phase sample introduction end (5), and the outlet of the high-density phase sample introduction end (5) is communicated with the inlet of the high-density phase sample introduction needle (6).
3. The two-phase sample injector for the spinning droplet interfacial tensiometer according to claim 2, characterized in that the low-density phase sample injection needle (8) is connected with the circular expanding cavity (5) and the needle point is inserted into the circular expanding cavity (5), and the needle point of the low-density phase sample injection needle (8) is in the same horizontal direction with the needle point of the high-density sample injection needle (6) in the circular expanding cavity (5).
4. The two-phase sample injector for spinning drop interfacial tensiometer according to claim 1, characterized in that the high-density phase injector (1) is a plain injector.
5. The two-phase sample injector for spinning-drop interfacial tensiometer according to claim 1, characterized in that the low-density phase injector (2) is a micro-injector with a size of 50uL or less.
6. The method of using the two-phase sample injector for a spinning-drop interfacial tensiometer of claim 2, comprising the steps of:
firstly, filling a high-density phase in a high-density phase injector (1), filling a low-density phase in a low-density phase injector (2), then inserting the high-density phase injector (1) into a high-density phase sample injection end (4), and inserting the low-density phase injector (2) into a low-density phase sample injection end (7);
secondly, pushing the high-density phase injector (1) until the high-density phase flows out from the outlet end of the high-density phase sample injection needle (6) and no bubbles emerge;
thirdly, pushing the low-density phase injector (2) to the bottom, enabling the low-density phase in the low-density phase injector (2) to completely enter the low-density phase sample injection needle (8), and then filling the low-density phase in the low-density phase injector (2) again and inserting the low-density phase sample injection end (7);
fourthly, the high-density phase injector (1) is pushed until the low-density phase appears at the outlet end of the needle point of the high-density phase sample injection needle (6) and is arranged side by side; if more than 2 ml of the high-density phase in the high-density phase injector (1) is pushed, the low-density phase does not appear at the outlet end of the needle point of the high-density phase sampling needle (6), the third step is repeated until the low-density phase appears at the outlet end of the needle point of the high-density phase sampling needle (6) and the low-density phase is discharged;
fifthly, inserting the high-density phase sample injection needle (6) into the test tube of the rotary drop interfacial tension meter, and pushing the high-density phase injector (1) to fill or partially enter the test tube with the high-density phase;
and sixthly, properly pushing the low-density phase injector (2), then pushing the high-density phase injector (1) to enable the high-density phase to push the low-density phase on the needle point of the low-density phase sampling needle (8) in the circular expanding cavity (5) into the test tube, and continuously pushing the high-density phase injector (1) until the high-density phase is filled in the test tube, wherein the low-density phase is suspended in the high-density phase in the test tube in the form of liquid drops or bubbles.
7. The method of using a two-phase sample injector for a spinning drop interfacial tensiometer as claimed in claim 1, further comprising the steps of:
and seventhly, slowly withdrawing the high-density phase sample injection needle (1), covering a test tube sealing cap, and screwing down to finish the sample injection process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810849984.9A CN108663291B (en) | 2018-07-28 | 2018-07-28 | Two-phase sample injector for rotary drop interfacial tensiometer and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810849984.9A CN108663291B (en) | 2018-07-28 | 2018-07-28 | Two-phase sample injector for rotary drop interfacial tensiometer and use method thereof |
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| Publication Number | Publication Date |
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| CN108663291A true CN108663291A (en) | 2018-10-16 |
| CN108663291B CN108663291B (en) | 2023-09-26 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4942760A (en) * | 1989-03-28 | 1990-07-24 | Intevep, S.A. | Apparatus for the measurement of interfacial tension |
| US4953389A (en) * | 1989-05-02 | 1990-09-04 | University Of Calgary | Captive bubble surface tensiometer |
| EP0843170A2 (en) * | 1996-11-13 | 1998-05-20 | Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. | Device for the measurement of surface tension of liquids |
| US6119511A (en) * | 1998-04-27 | 2000-09-19 | Surface Tensiometry, Inc. | Method and apparatus to measure surface tension by inverted vertical pull |
| US6245056B1 (en) * | 1999-02-12 | 2001-06-12 | Jack M. Walker | Safe intravenous infusion port injectors |
| CN201583475U (en) * | 2009-11-20 | 2010-09-15 | 上海梭伦信息科技有限公司 | Quartz glass sample pipe for spinning drop interface tension meter and fixing device thereof |
| CN102213668A (en) * | 2010-04-09 | 2011-10-12 | 上海中晨数字技术设备有限公司 | Device and method for measuring ultra-low interfacial tension by rotary liquid drop process |
| CN204679387U (en) * | 2015-05-14 | 2015-09-30 | 上海梭伦信息科技有限公司 | The dynamical interfacial tension instrument of a kind of high speed, controllable temperature |
| CN105136617A (en) * | 2015-05-15 | 2015-12-09 | 中国海洋石油总公司 | Interfacial tension measurement system |
| CN105203432A (en) * | 2014-06-16 | 2015-12-30 | 上海梭伦信息科技有限公司 | Device and method for testing contact angle and interfacial tension at ultrahigh pressure and high temperature |
-
2018
- 2018-07-28 CN CN201810849984.9A patent/CN108663291B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4942760A (en) * | 1989-03-28 | 1990-07-24 | Intevep, S.A. | Apparatus for the measurement of interfacial tension |
| US4953389A (en) * | 1989-05-02 | 1990-09-04 | University Of Calgary | Captive bubble surface tensiometer |
| EP0843170A2 (en) * | 1996-11-13 | 1998-05-20 | Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. | Device for the measurement of surface tension of liquids |
| US6119511A (en) * | 1998-04-27 | 2000-09-19 | Surface Tensiometry, Inc. | Method and apparatus to measure surface tension by inverted vertical pull |
| US6245056B1 (en) * | 1999-02-12 | 2001-06-12 | Jack M. Walker | Safe intravenous infusion port injectors |
| CN201583475U (en) * | 2009-11-20 | 2010-09-15 | 上海梭伦信息科技有限公司 | Quartz glass sample pipe for spinning drop interface tension meter and fixing device thereof |
| CN102213668A (en) * | 2010-04-09 | 2011-10-12 | 上海中晨数字技术设备有限公司 | Device and method for measuring ultra-low interfacial tension by rotary liquid drop process |
| CN105203432A (en) * | 2014-06-16 | 2015-12-30 | 上海梭伦信息科技有限公司 | Device and method for testing contact angle and interfacial tension at ultrahigh pressure and high temperature |
| CN204679387U (en) * | 2015-05-14 | 2015-09-30 | 上海梭伦信息科技有限公司 | The dynamical interfacial tension instrument of a kind of high speed, controllable temperature |
| CN105136617A (en) * | 2015-05-15 | 2015-12-09 | 中国海洋石油总公司 | Interfacial tension measurement system |
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| CN108663291B (en) | 2023-09-26 |
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