28 Environmental Laboratory


Best practice zero solvent emissions in your lab


Analysis of 8 Polychlorinated Biphenyls (PCB)


in environmental matrices by GC-MS/MS PCBs are resistant to decomposition in the environment, and tend to accumulate in living organisms. As a result, they are designated as POPs (Persistent Organic Pollutants). In monitoring these environmental pollutants in river water and sludge, sensitivity for the detection of trace quantities and separation from impurities in the samples become important issues. An application from Shimadzu demonstrates the analysis of 8 different PCB over a broad calibration range (0.1 μg/L to 200 μg/L). Instrument calibration was done using an internal standard approach. 8 levels between 0.1 μg/L and 200 μg/L have been measured for calibration and resulted in R2-value above 0.9995 for all compounds. Stability evaluation of the calibration was done using the internal standard (ISTD) stability. Each sample contained identical amount of ISTD spiked at the end of sample preparation. Excellent sensitivity combined with a high linear dynamic range was shown for standards and real world samples in PCB analysis using GCMSMS. Excellent sensitivity combined with a high linear dynamic range was shown for standards and real world samples in PCB analysis using GCMSMS.


More information online: ilmt.co/PL/Q2vP


Solvent emissions cause many occupational diseases, breakdowns, and malfunctions. Especially in instrumental analysis, failures can be costly if they result in interruptions and maintenance work. SCAT Safety Caps block solvent vapours and ensure clean, reliable analysis. It has never been so easy to protect your health and save costs at the same time.


The SCAT system blocks solvent vapours and keeps your eluents clean. It protects your health, environment and quality of your analytical results. The mixing ratio of your solvents stays stable, as there is no evaporation.


Workspace safety and risk of solvent vapours: solvent vapours are toxic, fl ammable, and harmful to health. They escape even through smallest openings and leaks. During long-time exposure, even small concentrations in the laboratory air can cause serious health risks and damage.


Hermetically closed systems reduce emissions to zero: when extracting the eluent, the SCAT air valve ensures safe pressure equalisation to avoid underpressure during HPLC operation. On the waste side of your HPLC, the exhaust fi lter avoids overpressure inside the collecting container, and adsorbs vapours of solvents, acids and bases with a mix of 3 types of activated carbon.


The easiest way to ensure safety and quality for your HPLC lab: the SCAT System can be installed with a minimum of effort and cost, compared to the hassle of installing ventilation systems for each workplace. Discover the solution and upgrade your laboratory now to the latest safety standards.


More information online: ilmt.co/PL/16xN and ilmt.co/ PL/zBo8


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Scientists develop new approach to detect PFAS ‘forever chemicals’ in water


Scientists in Chemistry and Environmental Science at the University of Birmingham in collaboration with scientists from the Bundesanstalt für Materialforschung und -prüfung (BAM), Germany’s Federal Institute for Materials Research and Testing, have developed a new approach for detecting pollution from ‘forever chemicals’ in water through luminescence. PFAS or ‘forever chemicals’ are manufactured fl uorine chemicals that are used widely in different industries - from food packaging to semiconductor production and car tires. They are non-degradable and accumulate in the environment. Concerns regarding the toxic pollution they cause, particularly in water, have been rising in recent years.


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Stuart Harrad, Professor of Environmental Chemistry at the University of Birmingham, who – with colleague Professor Zoe Pikramenou, Professor of Inorganic Chemistry and Photophysics - co-led the design of a new sensor, said: “Being able to identify ‘forever chemicals’ in drinking water, or in the environment from industrial spills is crucial for our own health and the health of our planet. Current methods for measurement of these contaminants are diffi cult, time-consuming, and expensive. There is a clear and pressing need for a simple, rapid, cost-effective method for measuring PFAS in water samples onsite to aid containment and remediation, especially at (ultra)trace concentrations. But until now, it had proved incredibly diffi cult to do that.”


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The researchers, who have published their fi ndings in Analytical Chemistry, have created a prototype model which detects the ‘forever chemical’ perfl uorooctanoic acid (PFOA). The approach uses luminescent metal complexes attached to a sensor surface. If the device is dipped in contaminated water, it detects PFOA by changes in the luminescence signal given off by the metals.


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Professor Pikramenou commented: “The sensor works by using a small gold chip grafted with iridium metal complexes. UV light is then used to excite the iridium which gives off red light. When the gold chip is immersed in a sample polluted with the ‘forever chemical’, a change of the signal in the luminescence lifetime of the metal is observed to allow the presence of the ‘forever chemical’ at different concentrations to be detected. So far, the sensor has been able to detect 220 micrograms of PFAS per litre of water which works for industrial wastewater, but for drinking water we would need the approach to be much more sensitive and be able to detect nanogram levels of PFAS.” The team has collaborated with surface and sensor scientists BAM in Berlin for the assay development and dedicated analytics at the nanoscale. Dan Hodoroaba, head of BAM’s Surface and Thin Film Analysis Division, emphasized the importance of chip characterization: “Advanced imaging surface analyses are essential for the development of dedicated chemical nanostructures on customised sensor chips to ensure optimal performance.”


Knut Rurack, who leads the Chemical and Optical Sensing Division at BAM, added: “Now that we have a prototype sensor chip, we intend to refi ne and integrate it to make it portable and more sensitive so it can be used on the site of spills and to determine the presence of these chemicals in drinking water.” Professor Pikramenou concluded: “PFAS are used in industrial settings due to their useful properties for example in stain-proofi ng fabrics. But if not disposed of safely these chemicals pose a real danger to aquatic life, our health, and the broader environment. This prototype is a big step forward in bringing an effective, quick, and accurate way to detect this pollution helping to protect our natural world, and potentially keep our drinking water clean.”


IET JANUARY / FEBRUARY 2024


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Samplers are ship leak tested (1 x 10-6 mL/sec) and ready to use to reduce your equipment prep time. In addition, all units are individually laser etched with a serial number and fl ow rate, so there’s no more guesswork from lost tags or labels.


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Simple, reliable and precise ammonia measurement in water email:


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needed to perform 30 tests: thirty ampoules, Stabilizer Solution, 25 mL sample cup, 3-mL syringe, ampoule blank, and instructions. This kit requires the use of a CHEMetrics Direct-Readout Photometer or a spectrophotometer capable of accepting a 13 mm diameter round cell. Instrument sold separately.


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More informatin online: ilmt.co/PL/8jpB For More Info, email:


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CHEMetrics announces the release of a new Vacu-vials test kit which employs the Direct Nesslerization method to measure ammonia in drinking water, clean surface water, good- quality nitrifi ed wastewater effl uent, and seawater. The new K-1513 instrumental test kit offers an extended shelf-life advantage over our existing K-1503 and K-1523 Nessler ammonia Vacu-vials test kits. K-1513 is offered as an alternative to these kits when a longer shelf life is desirable and refrigerated storage is not an option. This test kit can be used to measure the concentration of ammonia in seawater by using the A-1503 Accessory Solution Pack sold separately.


The K-1513 Vacu-vials Ammonia Test Kit comes in a cardboard box and contains everything 61733pr@reply-direct.com


Restek soil gas samplers are designed for simplicity, reliability, and fl exibility, so you can maximise data accuracy while minimising time, expense, and user error. The rugged, unibody design has fewer connections, so it’s quick and easy to set up and has fewer places where leaks could occur compared to typical samplers. The all-stainless-steel construction makes cleaning simple and means no contamination from degrading O-rings.


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