48 Advertisers Index
Company Page ABB Ltd
AQE Aquaread Limited Company v 47 OFC
Casella 42 CEM INDIA Dado Lab
DD Scientifi c Ltd
38 39 15
Environmental Instruments /AQ Mesh 43 Euro-Gas Ltd
Figaro Engineering Inc. GFG Gesellschaft fur Geratebau 4-5
6, 14, 48 8
Herman Sewerin
Ion Science Ltd - Instruments Keller Ag
LogiDataTech GmbH
Meteor Communications MRU GmbH
Myron L Company n.e.t
Page Company Page 11
10, iii OBC 12 vii 35 22 13
nanoplus Nanosystems and Technologies GmbH 34 RM Young
32 Real-time measurement of PFAS with Proton-Transfer-Reaction Mass Spectrometry (PTR-TOFMS)
The detection and quantifi cation of Poly- and Perfl uoroalkyl Substances (PFAS) has recently become one of the hottest topics in analytical chemistry. Many of these omnipresent “forever chemicals” are connected to serious health concerns and thus have been subject to increasingly stringent restrictions. So far, the vast majority of analytical PFAS studies have been performed offl ine, utilizing time-consuming GC and LC based techniques. While these methods may be the gold standard for spot sampling, they render online compound monitoring impossible.
Ionicon recently presented the fi rst results of a comprehensive series of real-time direct-injection PTR-MS studies on PFAS: fi ndings on the ion chemistry, experimentally determined Limits-of-Detection (LoDs), and a proof-of-concept indoor air study. Ionicon utilised an off-the-shelf PTR-TOF 6000 with a mass resolution of about 6000 m/∆m and a sensitivity of about 2000 cps/ppbv. As all Ionicon PTR-TOFMS instruments come with TRU-E/ N® ion chemistry, also for this feasibility study no compound-specifi c calibration is necessary for quantifi cation.
Perfl uorotributylamine or PFTBA (C12 of 980 pptv in an N2
PFTBA result in a product ion at m/z 413.977 (C8 NF10 +). NF16 F27 matrix and was dynamically diluted to determine the Limits-of-Detection (LoDs). Dissociative PTR reactions of H3 the low chemical background in this high mass region result in excellent LoDs: 2.4 pptv after only 1 s of integration time and 280 ppqv with 1 min integration time. With NO+ and NH4 A petri dish wetted with Perfl uorooctanol, an FTOH (C8 H5 F13
N) is the most potent greenhouse gas known so far. It is available as a gas standard at a certifi ed concentration O+ with
+). The high sensitivity of the PTR-TOF 6000 in combination with the extremely broad transmission range of IONICON’s hexapole ion guides and + (produced via
Ionicon’s patented ammonia-free method) reagent ions no PFTBA product ions can be observed. O2+ reagent ions react via dissociative charge transfer to product ions at m/z 501.971 (C9NF20+) and m/z 263.978 (C5
O), was used to create an initial indoor air concentration of 6.7 ppbv in an offi ce room of about 30 m³ (LxWxH: 410x250x290 cm; RT: 23-26°C;
two walls consisting of windows) with low ventilation. 8.8 min after the start of the experiment the petri dish was removed. Subsequently, the indoor air was monitored for 48 hours at an increased integration time (set from initially 1 s to 30 s). 20 minutes into the experiment the measured concentration dropped to 50% and about 5 hours later to 10% of the initial 6.7 pptv. Interestingly, 24 hours after the start direct sunlight warmed the surfaces in the room, which caused an instant concentration increase by a factor of 2.3. Opening the windows for a short time and thus venting the room after 48 hours resulted in only a short dip in FTOH concentration, with 85 pptv being present after 63 hours. This is still fi ve times higher than the already elevated (due to previous experiments) background of 17 pptv at the beginning of the experiment.
In parallel to FTOH, perfl uorobutanoic or PFBA (C4 HF7 O2 ) was also released into indoor air using a wetted petri dish. PFBA is of particular interest as this compound is known to accumulate in the lungs
and increased plasma levels are associated with a greater severity of COVID-19 prognosis. However, in contrast to FTOH, indoor air concentration of PFBA dropped to 50% of the initial 676 pptv already after 10 minutes and to 10% after 25 minutes. 2 hours into the experiment the concentration was below 10 pptv and did not increase when the sun was heating up the room.
Looking to Grow Your Company’s Product Sales Portfolio?
Are you a Distributor with a proven track record in selling gas
detection, laboratory or safety products? Are you looking for a quality range to enhance your sales portfolio?
Euro-Gas are currently searching for Companies in the UK and across Europe to distribute the pioneering and world-leading Komyo Kitagawa Gas Detector Tube System and range of gas detector accessories.
We offer full training, support and marketing assistance for all our Distributor Network members. Please get in touch for information. We look forward to meeting you!
These three examples demonstrated the excellent performance of IONICON’s PTR-TOF 6000 for real-time quantifi cation of PFAS in air. Additionally, an in-depth study on a much wider range of PFAS will soon be published. For rare cases where the PTR-TOF 6000’s performance should still be insuffi cient, Ionicon recommends their brand-new FUSION PTR-TOF 10k with 20-40 times higher sensitivity and about twice the mass resolution. This Next-Gen PTR-TOF comes with the novel Fast-SRI ion source for nearly instant reagent ion switching and the ultra-clean FUSION reaction chamber for LoD’s <200 ppqv. This instrument is TRU-E/N certifi ed.
The ideal solution for precise hydrostatic pressure
For More Info, email: email:
The KELLER 26X level probe is designed with mathematical modelling to compensate for temperature dependencies and non-linearity by the microcontroller, to ensure highly accurate measurement results. The probe offers a scalable analogue output and a combination of analogue and digital interfaces, enabling straightforward integration into automation systems while facilitating the reading of measurements.
For More Info, email: email:
The 26X level probe boasts a robust, fully welded stainless-steel construction with high-quality cable glands, ensuring maintenance-free operation for years to come. The extended lightning protection option provides additional safety, making it the perfect solution for demanding environments.
For More Info, email: email:
Churston House, Bascombe Road, Churston Ferrers, Devon, TQ5 0JJ, United Kingdom.
☎ +44 (0)1803 844414
Email:
sales@euro-gasman.com Web:
www.euro-gasman.com
This level probe is commonly used for hydrostatic pressure measurements such as groundwater, surface water, water tank, and fuel tank measurements. The KELLER 26X level probe provides superior performance, with excellent long-term stability and precise compensation for non-linearities and temperature dependencies.
More information online:
ilmt.co/PL/28WA For More Info, email:
IET SEPTEMBER / OCTOBER 2023 email: For More Info, email:
59957pr@reply-direct.com
measurements in harsh conditions KELLER’s 26X level probe provides highly accurate and reliable hydrostatic pressure measurements with exceptional long-term stability, making it the ultimate solution for demanding environments.
60433pr@reply-direct.com
Sensorix GmbH Shimadzu UK Ltd SK-Elektronik GmbH Solinst
Teledyne Gas & Flame Detection Tintometer GmbH
Trace Elemental Instruments Vega Grieshaber Water-I.D. WWEM
9
viii 33 21
7, IFC 19 29 17 23
IBC
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60
