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Quantitative liquid taker and its usage method
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A liquid extractor and container technology, applied in the field of liquid extracting devices, can solve the problems of difficult automation, low precision, and high price, etc., and achieve the effects of various choices, low cost, and simple structure.
Inactive Publication Date: 2016-04-27
NANJING COMM INST OF TECH
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Problems solved by technology
In the test, the required amount of supernatant is certain. For example, the volume of the supernatant to be sucked is 10ml. Using a general liquid dispenser, it is necessary to draw the supernatant to the 10ml mark carefully during the specific operation. And the accuracy is not high
If you use a high-precision liquid dispenser, the price is too expensive
At the same time, the use of the above-mentioned type of liquid extractor requires manual operation by the user to carefully observe the height of the liquid absorbed, and the operation is difficult to automate
Method used
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no. 1 example
[0031] Such as Figure 1 to 5 As shown, the quantitative liquid extractor includes a liquid extractor suction tube 1, wherein the upper end of the liquid extractor suction tube 1 is inserted into the overflow container 2 and the lumen volume of the liquid extractor suction tube 1 matches the target liquid volume value, The overflow container 2 is provided with a negative pressure generating device 3 that can generate a negative pressure in the overflow container 2 and a pressure relief port 4 that makes the negative pressure in the overflow container 2 disappear.
[0032] The target liquid volume is 10ml, and the lumen volume is set to 10ml.
[0033] In the embodiment, the contact surface between the suction pipe 1 of the liquid extractor and the overflow container 2 is sealed.
[0034] In the embodiment, the contact surface between the negative pressure generating device 3 and the overflow container 2 is sealed.
[0035] In the embodiment, the negative pressure generating device 3 i...
no. 2 example
[0047] The quantitative liquid extractor includes a liquid extractor suction tube 1, wherein the upper end of the liquid extractor suction tube 1 is inserted into the overflow container 2 and the lumen volume of the liquid extractor suction tube 1 is adapted to the target liquid volume value. The overflow container 2 is provided with a negative pressure generating device 3 that can generate negative pressure in the overflow container 2 and a pressure relief port 4 that makes the negative pressure in the overflow container 2 disappear.
[0048] The target fluid volume is 15ml, and the lumen volume is set to 15.2ml.
[0049] In the embodiment, the negative pressure generating device 3 is a vacuum generator. The use of a vacuum generator can make the present invention and automation equipment more convenient to use in combination.
[0050] In the embodiment, the contact surface between the suction pipe 1 of the liquid extractor and the overflow container 2 is sealed.
[0051] In the emb...
no. 3 example
[0056] The quantitative liquid extractor includes a liquid extractor suction tube 1, wherein the upper end of the liquid extractor suction tube 1 is inserted into the overflow container 2 and the lumen volume of the liquid extractor suction tube 1 is adapted to the target liquid volume value. The overflow container 2 is provided with a negative pressure generating device 3 that can generate negative pressure in the overflow container 2 and a pressure relief port 4 that makes the negative pressure in the overflow container 2 disappear.
[0057] The target fluid volume is 5ml, and the lumen volume is set to 4.9ml.
[0058] In the embodiment, the negative pressure generating device 3 is a negative pressure airbag.
[0059] In the embodiment, the contact surface between the suction pipe 1 of the liquid extractor and the overflow container 2 is sealed.
[0060] In the embodiment, the contact surface between the negative pressure generating device 3 and the overflow container 2 is sealed.
...
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Abstract
The invention discloses a quantitative liquid fetching device. The quantitative liquid fetching device comprises a liquid fetching device suction tube, wherein the upper end of the liquid fetching device suction tube is inserted into an overflow liquid vessel, the volume of a tube cavity of the liquid fetching device suction tube is matched with a target fetched liquid volume value, and the overflow liquid vessel is provided with a negative pressure generating device which can enable the interior of the overflow liquid vessel to be in negative pressure, and a pressure relief opening which can enable the negative pressure inside the overflow liquid vessel to disappear. According to a method disclosed by the invention, accurate liquid fetching can be carried out without setting accurate negative pressure, so that the selection of the negative pressure generating device is diverse, and the cost is relatively low. The quantitative liquid fetching device disclosed by the invention is particularly suitable for being applied to soil composition testing experiments. According to the method disclosed by the invention, the accurate liquid fetching can be carried out without setting the accurate negative pressure, so that the selection of the negative pressure generating device is diverse, and the cost is relatively low. The quantitative liquid fetching device has the advantages that the structure is simple, the cost is low, the high-accuracy quantitative liquid fetching is realized in the case that users have no need of observing scales of the liquid fetching device, and the cooperation with an automatic device is facilitated.
Description
Technical field [0001] The invention relates to the technical field of liquid taking devices, especially liquid taking devices, and specifically, a quantitative liquid taking device and a method of use thereof. Background technique [0002] The pipette is a hand-held or fixed dispensing device used especially in the laboratory for dispensing liquids. In the soil composition test experiment, the use of the liquid extractor is also very frequent. The soil composition test experiment is to immerse the quantitative soil to be tested in a certain amount of measuring liquid, stir it evenly and let it stand for a period of time, and then use a liquid extractor to absorb the supernatant and measure the supernatant. In the experiment, the required amount of supernatant is a certain amount. For example, the volume of supernatant that needs to be sucked is 10ml. Using a general liquid extractor, you need to carefully suck the supernatant to the 10ml mark in specific operations. And the ac...
Claims
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Application Information
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