18 Environmental Laboratory - Spotlight on PFAS Range of reference standards’ packaging, labelling and
certifi cates overhauled to improve lab safety and productivity Based on customer feedback, Restek’s ISO-accredited reference standards labs have made a number of exciting improvements to its packaging, labelling and certifi cates of analysis. Smaller, round ampul storage tubes perfectly fi t a Restek ampul (and included deactivated vial) to help protect them from breaking, avoiding a potential safety hazard and operational disruption. The new tubes also take up less space—you can fi t three of the new design in the same space as one of the old—and they are more environmentally friendly because they use less plastic.
Perhaps the most exciting change is that the ampul storage tube label features a QR code that links directly to the certifi cate of analysis for your specifi c standard and lot #. Whether you are looking to digitally archive your certifi cate or have lost the hard copy, this QR code will give you instant, easy access to your
documentation any time, from anywhere. Additionally, larger pictograms on the already GHS-compliant labels better promote safety in your lab and help you meet OSHA, CLP, and other government requirements.
The ampul label itself is now removable so that it can be transferred to the included deactivated vial along with your standard. And a single, easy-tear design means that both vial and notebook labels stay attached to the ampul until you are ready to use them. The new notebook label is larger and features “received” and “opened” write-in date areas. The new vial label is perfectly sized to provide clear visibility to the contained volume and seamless autosampler integration without trimming. And both labels feature full handling instructions to help you ensure the integrity and proper use of your standards before and after transfer.
Working closely with its independent ISO accreditation body representatives, Restek has streamlined and simplifi ed your documentation to help avoid confusion and bolster your confi dence in your reporting. Specifi cally, Restek certifi cates have transitioned to a single “total expanded uncertainty” value as opposed to the three uncertainty values provided historically. Restek labs also conducted extensive, real- time travel studies to improve the accuracy of the now-single uncertainty value. In particular for custom Restek reference standards, all three levels of available documentation have been retitled so that each is clearly and accurately marked as a different type of “certifi cate of analysis.” The defi nitions of each level have also been updated to clarify the differences. It is important to note that Restek is not changing its manufacturing processes, QC methods, ISO accreditations, CRM designations, ampuls, or the composition of the standards themselves in any way. Customers will still order the same items/catalogue numbers and receive the same high-quality standards they have come to rely on from Restek.
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in Wastewater with Part Per Trillion Detection Limits Hg, As & Se are considered environmental priority pollutants and the determination of these metals in wastewater from industrial sources is a challenging application. In recent years wastewater treatment plants have been installing technologies to capture and remove the metals. The effi ciency of these treatment processes needs to be monitored using accurate analytical systems.
Some examples of industrial processes that require wastewater monitoring for these elements include:
• Thermal Coal Power Generation (FGD wastewater) • Oil and gas refi neries (Produced/Desalter Water) • Smelting plants • Semiconductor fabrication • Incineration wastewater
Powerful and versatile
overhead stirrers Wiggens introduces the new generation overhead stirrers with WOHS-10 Pro and WOHS-15 Pro series. The units are designed to surpass the requirements of laboratories and institutions around the world with their modern technology and high quality.
The Wiggens overhead stirrers are featured with a high resolution TFT display which can show not only the current speed and torque, but also the set speed, temperature and timer settings. With turning knob and touch key, Wiggens overhead stirrers are very easy to operate. Equipped with the Keyless hand-locking chuck, it is easy to change the impellers without any tools.
The use of BLDC motors is highly benefi cial to the performance of the products, in comparison to AC motors, BLDC motors are quieter, more robust and maintenance free. The housing is made of powder-coated cast aluminium which is fairly corrosion-resisted with good heat reduction ability, which contributes to keeping the unit robust and cool in long-term applications. The USB port and the analogue connection port make all stirrers highly versatile and adaptable for different applications. They can be used as stand-alone units in the labs for scientists and students, as well as integrated in chemical reaction systems. Wiggens can also provide various impellers, from PTFE to stainless steel with different paddle shape and shaft diameter, to meet customer different applications.
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Online Analysis of Mercury (Hg), Arsenic (As) and Selenium (Se) • Chor-alkali plants Benefi ts of Online Analysers
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The targeted sample matrices are often quite diffi cult to manage so any online approach must be capable of handling a variety of complex waste waters.
It’s widely accepted that online analysers offer some major operational and cost benefi ts compared to traditional laboratory approaches including; • Improved effi ciency, accuracy, and consistency of the data • No gaps in the data set (24/7 capability) - Realtime results (with alarm feedback) - Lower operating costs and labour savings through automation • Improved worker safety
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Online Analysers
PSA’s online systems have the following attributes; • Touch screen PC
• Multiple sample streams including grab samples • Self-cleaning sample fi ltration. • Very Low reagent and utility consumption • Typically, 5-7ml of reagent is required per sample • Online digestion and sample preparation • Customisable alarm output options
The integrated AFS detector offers a number of analytical performance benefi ts; • Ultra-trace limits of detection • Wide analytical linear working ranges • Lack of chemical interferences • Inexpensive running costs • Ease of use
In common with all our technology PSA employs AFS as our central analytical technology which offers dominance and leading performance in terms of; sensitivity, working ranges, freedom from interferences. These attributes combined with our novel sampling systems, our hallmarked robustness and ease of use make PSA your fi rst choice for trace metal determinations.
To compliment the online analysers P S Analytical offer a range of AFS laboratory- based systems. With the addition of analyte separation capabilities (which is becoming more routine) allowing for speciation studies, PSA offers powerful analytical tools to help contract laboratories, research teams and regulators alike with these determinations.
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IET JANUARY / FEBRUARY 2023
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