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Microplastics and those Pesky Teabags


In the UK, over 60 billion cups of tea are made annually using teabags (around 6000 of these in the Analytix offi ce alone!). Although teabags are typically made from paper, they often include a small amount of plastic that is used to seal them shut although some teabags use a plastic mesh for the bag itself. A recent study showed that single teabag can release more than 11 billion microplastic and 3 billion nanoplastic particles into the hot water.


An application note from Analytix used a CDS pyrolysis system to analyse tea bags from two manufacturers where a GCMS EGA method was followed by multistep pyrolysis. As expected, paper was identifi ed in each of the two bags however one also contained a styrene-methacrylate polymer and the other polyethylene.


This application note is a continued study to further quantify microplastics concentrations in a variety of materials. In this case a teabag is really a single use plastic and most tea drinkers are not just ingesting plastic but potentially adding to the environmental burden - gives you something to think about with the next 3pm cuppa.


Download the application note. More information online: ilmt.co/PL/ZkwP 58067pr@reply-direct.com


Infrared radiation heating refers to the spectrum between 0.7um-100um of light waves, emission and transmission accompanied by obvious, directional energy transmission. The energy transmission does not need any media, even in vacuum space. The infrared heating uses an electromagnetic wave with a wavelength of 2.5 to 15 um. This speed is much higher than the rate of conduction and convection. Thanks to this radiation heating technology, Wiggens hotplate and stirrer can be used for speedy heating up for various shaped vessels including round-bottom fl asks, and the solution inside can be heated up to a maximum temperature of 450°C in a very short time.


The hotplate and stirrer, with its advanced infrared radiation technology, is characterised by direct, clean and safe heating compared to oil heating. The high infrared permeability ensures that the heating energy is transferred quickly and with very limited loss, i.e. it heats liquids fast and thus saves time and energy. PID control or advanced ICC technology enable good temperature stability. If the Pt-100 sensor is connected, temperature- controlled work with stability of ± 2°C can be reached in most applications.


More information online: ilmt.co/PL/AyBq 57811pr@reply-direct.com


LABMATE UK & IRELAND - SEPTEMBER 2022


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