Biolin Scientific has made a significant improvement to its optical tensiometer line Theta by releasing a new disposable tip dispenser.
“The choice of using the disposable tips in the new dispenser was obvious since it is a preferred solution by our customers.” says Susanna Laurén, Marketing Director, Attension
Attension dispensers utilizes disposable tips, allowing for rapid changes between liquids without the risk of cross-contamination. Allowing you maintain the purity of your samples, leading to more reliable data. This feature is particularly beneficial for laboratories handling multiple liquids, as it reduces downtime and increases throughput.
In addition to using disposable tips, it’s possible to connect a positive displacement pipette into Attension dispenser. The positive displacement pipette allows dispensing of small drops to measure contact angles on areas down to 0,5 mm in diameter.
Advancing and receding angles contact angle measurements require good control of the dispenser. This can be achieved with the positive displacement pipette where dead volume can be minimized thus enabling superior control of the dispensing rate.
Di-iodomethane is often used as a probe liquid to measure surface free energy of solids. The density of di-iodomethane is high requiring a different dispensing strategy than water. Using a larger orifice tip (high viscosity tip) will make the drop creation fast and convenient.
Liquids with low surface tension (ST) easily wet the solid surface leading to a spreading of the liquid. When dispensing low surface tension liquids, the same easily happens but now the liquid wets the side of the tip, and the drop formation is challenging. Using PFA tip with extremely low surface free energy will prevent wetting even with low ST liquid and make dispensing possible.
Liquids with high viscosity are difficult to dispense especially if the tip orifice is small. Using high viscosity tips with bigger tip orifice size enables dispensing of liquids with viscosities up to 10 000 mPa.
Maximize efficiency with the ability to use up to four Attension disposable tip dispensers simultaneously in one instrument. Each dispenser can be used with different liquids and the most suitable tip for each liquid can be selected. Most common application is the measurement of surface free energy by using three different probe liquids.
