How to choose the correct pipette ? This is a problem that many laboratory procurement personnel are very concerned about. First, consider the performance, quality, and price of the pipette product. In addition, pay attention to the after-sales problem of the pipette, and the calibration of the pipette. How to deal with problems such as quality failures. Next, Xiaobian will talk about the purchase considerations of pipettes from three aspects.
1. Product performance, ie pipette accuracy and repeatability
For the vast majority of users, testing product performance before purchase is both difficult and unnecessary. Therefore, it is mainly based on technical data provided by the manufacturer. But here are two things to explain: First, don't easily believe the seller's verbal commitment, be sure to check the written materials provided by the manufacturer; second, the brands that have a greater impact on the global pipette market, such as eppendorf, GILSON And Brand and so on, the technical data provided by it is more credible.
2. The product is reliable and durable
This aspect depends primarily on the materials used in the pipette. For the outer casing, it should have high impact resistance, corrosion resistance and low thermal conductivity (such as PVDF material); for pistons, there are mainly stainless steel, ceramic and plastic materials on the market. Stainless steel has good mechanical properties and long service life, but it is not suitable for pipetting strong acid and alkali; ceramics have high corrosion resistance, but mechanical properties are poor. Of course, quality materials often mean higher prices, so you need to consider the factors of purchase price and longevity.
3. Ergonomic design of the product The clinical laboratory can mainly consider the following points:
First, the short moving distance of the thumb to complete a pipetting cycle means higher comfort;
Second, compare the same range of pipettes to complete the draining force (must press the bottom) required thumb force, which is the key to affect comfort, the less force means the risk of finger damage caused by long-term use is smaller;
Third, loading and unloading the tip, the more labor-saving the better;
Fourth, the weight of the pipette is moderate, too heavy will increase the burden on the hand, but too light also means that the material may be unsatisfactory;
Fifth, other ancillary designs, such as the matte design of the housing and the finger hook design, help to further enhance comfort.
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