Pumps, Valves & Liquid Handling Pumps Peristaltic pump for atomic spectroscopy workfl ows
Since the pioneering work of German scientists Robert Bunsen (1811–1899) and Gustav Kirchhoff (1824–1887), who discovered that fl ame colour changes when elements are introduced, atomic spectroscopy has become one of the most widely used analytical techniques worldwide. Among the commonly applied methods, ICP-MS and ICP-OES are particularly successful for liquid analysis, both relying on an inductively coupled plasma source, either as an emission source or an ion source for mass spectrometry.
Pumps
Precise back pressure control for challenging gas–liquid systems
For precise transport of liquid samples, peristaltic pumps are the standard choice. They overcome changes in viscosity that could affect measurements and reduce matrix effects. The pump works by compressing and relaxing a volume of liquid within an elastic tubing, which is fi xed in a roller head and pressed against a curved
pressure plate. As the roller rotates, the liquid is continuously pushed toward the nebuliser. Because the sample only contacts metal- free tubing material, it can be transported over long distances to the ICP spectrometer without contamination.
The pumped volume can be controlled by the number of rollers, the rotation speed, and the tubing’s inner diameter. The tubing material can also be chosen based on the chemical properties of the sample, allowing even strong acids or organic solvents to be safely transported. However, with very sensitive devices, signal pulsations sometimes occur, traditionally requiring manual adjustment of the pressure plate.
Spetec has addressed this with its new ‘Easy Click’ peristaltic pump. The pressure plate is pre-set with a spring mechanism, eliminating the need for manual adjustments. Users can start the analysis sequence immediately, and
tubing changes are fast and tool-free.
In tests conducted at the Bundesanstalt für Materialforschung und -prüfung (BAM) in Berlin, two peristaltic pumps were evaluated on an ICP-OES instrument. Results showed that the analytical fi gures of merit, including limits of detection (LOD) and signal stability for ten elements (Al, Bi, Co, Cr, Cu, Fe, Mg, Mn, Ni, Se), were essentially identical across all pumps. LODs were in the lower µg/L range, with standard deviations below 1% for eight elements and under 2% for the remaining two.
The conclusion: the Easy Click pump matches traditional reference pumps in analytical performance, but excels in convenience, allowing quick and easy tubing changes without further adjustment.
More information online:
ilmt.co/PL/4lmk 66514pr@reply-direct.com
ADVERTORIAL Continuing the fi ght against plastic pollution
lacking the means to recycle plastic. This results in the equivalent of one garbage truck of plastic entering the ocean every minute, threatening marine life and, indirectly, human health, as microplastics can enter the food chain.
Integra Biosciences is proud to continue its partnership with CleanHub, driving meaningful action against plastic pollution before it reaches the world’s oceans. Thanks to Integra’s support, CleanHub and its local partners have collected over 21.5 million kilograms of plastic from coastal communities in developing countries, keeping it out of marine ecosystems.
Vapourtec has unveiled the eBPR-GL, a self- contained, electronically adjustable back pressure regulator engineered for gas and gas–liquid applications. Using advanced composite materials, the eBPR-GL provides precise control over back pressures from 0.1 to 10 bar (gauge) and fl ow rates from 0.01 to 20 ml/min, handling fl uids at temperatures up to 100°C.
Conventional BPRs often struggle with gases: leakage rates are higher than with liquids, causing pressure fl uctuations - especially at low fl ow rates - and signifi cant internal volumes can disrupt gas–liquid partitions. The eBPR-GL overcomes these challenges, offering stable, accurate pressure control even when gas partitioning is critical.
“eBPR-GL is a major step forward for back pressure regulation in gas–liquid systems,” said Duncan Guthrie, Vapourtec Managing Director. “Its wetted fl ow path features only PTFE and PFA fl uoropolymers, with perfl uoroelastomer seals, ensuring chemical resistance and reliability.”
The eBPR-GL can be supplied with or without an integrated user interface. Both versions support remote pressure adjustment via RS-232 serial commands.
More information online:
ilmt.co/PL/Rn1N 65811pr@reply-direct.com
SEE IT IN ACTION >
Globally, access to waste management is limited, with more than 2 billion people
CleanHub tackles the problem at its source. Its networks now reach over 2.5 million households, where plastics are sorted: recyclable materials are processed locally, while non-recyclable waste is safely converted into energy in industrial facilities such as cement plants. This approach not only protects the oceans but also supports communities by creating stable, fairly paid jobs in waste management and encouraging long-term responsible disposal habits.
Dr Ursula Leuthold, Sustainability Coordinator at Integra Biosciences,
commented: “Sustainability is central to everything we do, making CleanHub a natural partner. In 2025 alone, our contributions have helped collect over 8.2 million kilograms of plastic waste from communities and waterways. We are proud to help CleanHub safeguard our oceans and build resilient, environmentally responsible communities.”
More information online:
ilmt.co/PL/eq6W 66445pr@reply-direct.com
The FIRST
manual pipette that repeat dispenses.
This familiar lab tool is anything but ordinary. With INTEGRA's SWITCH you choose; pipette manually or 'SWITCH' to repeat dispense mode and gain productivity while enjoying the lowest plunger force possible.
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