Pumps, Valves & Liquid Handling


Precision repeat dispensing at your fi ngertips


The Socorex Stepper™ is a compact and reliable instrument intended for serial dispensing within volumes from 10 to 5000 µL. Associated with only three Ecostep™ positive displacement syringes, it provides a broad choice of 53 different volumes, and up to 73 aliquots per filling. Its unique four-finger activation eliminates thumb fatigue. This enables smooth monitoring of each step, whatever the pipetting speed.


There are three interchangeable setting knobs, bearing volumes and corresponding number of aliquots. Volume selection is easy and quick, with a clear reading of the adjustment chosen. The colour codes on both syringes and setting knobs eliminate any risk of wrong use. A graduation on the syringe helps monitoring liquid content. If remaining liquid in the syringe is smaller than the selected aliquot volume, the built-in self-locking mechanism stops distribution to prevent false delivery.


Stepper™ offers a great flexibility in use, fitting well in many laboratories performing repeat dispensing tasks such as screening procedures, dividing samples in small portions, or dispensing reagents in vials. And the very fine syringe tip end facilitates distribution in narrow tubes.


The positive displacement Ecostep™ syringes avoid any direct liquid contact with instrument, thus limiting contamination with chemicals such as acids, bases and solvents. Syringes are also efficient for the distribution of foaming liquids as well as viscous and high-density reagents.


The Stepper™ repeater pipette has a very long lifespan, well matching with today’s concern to limit impact on the environment. There is no battery to change, nor electronic parts to recycle. For further details check the website or contact your closest Socorex distributor.


More information online: ilmt.co/PL/2vNy and ilmt.co/PL/lv9Q 62490pr@reply-direct.com


Liquid chromatography pump performance validation


Testa Analytical reports how its real-time LC flowmeter and validation software provide the perfect combination for labs looking to automatically validate the performance of HPLC, uHPLC and GPC/SEC pumps.


The Pump Validation Software Suite has been designed to accept raw data generated by the Testa Analytical flowmeter PC-App and perform all necessary flow calculations automatically. Using this powerful software tool - all data and parameters are automatically validated for fitness of use for validation and a summary report generated which can be stored or printed for hard copy documentation.


This powerful software tool comes with a Standard Operating Procedure (SOP) detailing the whole validation protocol. In addition, this new software can also be used to calculate ancillary pump performance parameters, such as real-time pulsation, which can be used to identify transient changes in pump performance.


The LC flowmeter range from Testa Analytical sets the benchmark for non-invasive monitoring devices for continuously measuring the performance of pumps serving HPLC, uHPLC, LC/MS, GPC/SEC, and flow chemistry systems. Compatible with all common solvents, the compact LC flowmeter powers itself from a USB connection.


At the heart of each Testa flowmeter is a high-resolution thermal flow sensor that is both extremely accurate and sensitive. This non-invasive sensor enables the device to operate over a wide dynamic range. Each Testa flowmeter is supplied with an easy-to-use PC based App that allows users to continuously record, and store measured flow rate data from a HPLC system. Current flow rate is displayed on the devices integral high-resolution OLED display.


More information online: ilmt.co/PL/XOoV 62481pr@reply-direct.com Advanced peristaltic pump for atomic spectroscopy


Since the pioneering work of German scientists Robert Bunsen and Gustav Kirchhoff in the 19th century, atomic spectroscopy has evolved into a widely adopted analytical method used worldwide for routine applications. In atomic spectroscopy, particularly in the field of inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma optical emission spectrometry (ICP-OES), multielement analysis of liquids is crucial. Both methods utilise the same inductively coupled plasma source, acting as either an emission or ion source for mass spectrometry.


For the efficient transport of liquid samples, peristaltic pumps have become essential, overcoming changes in composition and viscosity that can lead to matrix effects. These pumps operate by compressing and relaxing a trapped liquid volume within an elastic tubing, pressed against a curved pressure plate in the pumping head. The entrapped liquid is continuously transported toward the nebuliser through the rotation of the roller head, ensuring that the sample remains in contact only with the metal-free tubing. This allows for the transport of samples over extended distances to the ICP spectrometer.


The newly introduced ‘Easy Click’ peristaltic pump represents a significant advancement in this technology. Utilising the ‘easy click’ principle, the pressure of the plate is pre-adjusted by a spring, eliminating the need for manual optimisation and enabling an immediate start to the analysis sequence. This innovative feature simplifies the operation and expedites the workflow.


In a comprehensive study conducted by the Bundesanstalt für Materialforschung und -prüfung (BAM) in Berlin, Germany, Spetec tested two different peristaltic pumps alongside the ‘Easy Click’ pump on a simultaneously measuring ICP-OES instrument. The investigation revealed that all analytical figures of merit, including limits of detection (LOD) and signal stability, for a variety of elements did not significantly differ among the tested pumps. The ‘Easy Click’ pump demonstrated LODs in the lower µg/L range, achieving standard deviations of less than 1% for eight elements and less than 2% for the remaining two.


In summary, the “Easy Click” peristaltic pump from Spetec not only competes with reference pumps in terms of analytical performance but also stands out for its convenient and rapid tubing changes without the need for further adjustment.


More information online: ilmt.co/PL/8xQy 61999pr@reply-direct.com


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