What are the specific methods of using pipettes and pipettes, and how do you pay attention? Pipettes are precision instruments and equipments. Pay attention to their accuracy and accuracy. They should also be maintained and maintained. Below, we will learn from you about the specific methods and precautions.

Adjustable automatic liquid taker operation method:

Rotate the knob on the upper part of the dispenser with your thumb and forefinger to make the digital window appear the number of the required volume. Insert a plastic tip at the lower end of the dispenser and tighten it to ensure airtightness. Then hold the four fingers together. In the upper part of the liquid device, press the button on the top of the plunger rod with your thumb, press down to the first stop point, insert the tip of the liquid extractor into the solution to be taken, slowly release the button, suck the liquid, and stay 1 ~ 2 seconds (the viscous solution can lengthen the residence time), slide the tip along the wall of the container, and wipe the liquid that may adhere to the surface of the tip with absorbent paper. When the liquid is drained, the tip touches the inclined wall. Press the button to the first stop point, stay for one second (the viscous liquid has to lengthen the dwell time), then press to the second stop point, blow out the remaining solution at the tip of the tip, if it is not convenient to remove the tip by hand, The tip can be pushed into the waste bin by pressing the tip of the tip.

Pipette use precautions

1) When sucking the liquid, the thumb must be released slowly and smoothly, and it must not be suddenly released, so as to prevent the solution from being sucked up too quickly and rushing into the liquid extractor to corrode the plunger and cause air leakage.

2) In order to obtain higher precision, the sample solution needs to be sucked once before the sample is taken, and then the liquid is officially pipetted. Because the serum protein solution or organic solvent is sucked, a “liquid film” remains on the inner wall of the tip, causing the liquid discharge amount. It is too small and produces errors.

3) Liquids with large concentration and viscosity will produce errors. The amount of compensation to eliminate the error can be determined by experiment. The compensation amount can be set by changing the reading of the reading window with the adjustment knob.

4) The weight of the pure water taken by the analytical balance can be weighed and calculated to correct the liquid take-up. The weight of the 1 ml distilled water is 0.9982 g at 20 °C.

5) The method by which the pipette repeatedly hits the tip to tighten it is highly undesirable. Long-term operation can loosen the internal parts and damage the pipette.

6) When the pipette is not equipped with a tip, do not pipette.

7) When setting the range, the range to the desired rotational note, in the figures clearly display window, a button set range not within the range unscrewed pipette measuring range, otherwise stuck mechanism, damaged Pipette.

8) Pipettes are strictly prohibited to absorb liquids with strong volatility and strong corrosiveness (such as concentrated acid, concentrated alkali, organic matter, etc.).

9) Do not use a pipette to blow the mixed liquid.

10) Do not use a large-scale pipette to remove a small volume of liquid to avoid affecting accuracy. Also, if you need to remove a larger amount of liquid outside the range, use a pipette.

The above pipette information is provided by Shanghai Bashu. For more information on pipettes , please click:

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In 2007, Shanghai Bayu ( ) Industrial Co., Ltd. established an offline supply system for laboratory instruments, MRO industrial products, etc. In 2009, it officially launched an online procurement operation platform.

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