32 Dental surgery N2O Leak Detected
A dental engineer rapidly detected a leak in sedation equipment at a dental surgery in Dover (UK) when sent to investigate N2O problems after staff complaints about gas effects. Using a Geotech G200 N2O monitor supplied by Bedfont Scientific, the engineer was able to identify that the leak came from faulty sedation equipment. In addition he used two other G200s to monitor the time-weighted average (TWA) of two members of staff.
Previous passive monitoring in the surgery had indicated a TWA of N2O at 90ppm, and because of a suspected leak in a faulty machine it was sent for service and repair to fix the problem. However, staff continued to notice the effects of N2O.
The engineer sent to investigate said, "I had three G200 monitors and set one up to monitor the area around the machine and then asked the dentist and nurse to wear one each on 'person mode'. We monitored for two and a half hours over the morning session and did two treatments in that period using that particular machine. At lunchtime I checked the readings and the area monitor was sitting at 220ppm average, the dentist's personal monitor was showing a TWA of 105ppm and the nurse's was at 67ppm. These readings were pretty high for such a short period so I set the area monitor onto 'leak mode' and used it to ‘sniff’ around the machine with it set
to deliver 20% N2O at a low flow rate with the scavenger and delivery circuit connected. I found that the air intake of the mixer head on the machine was spewing out N2O at an alarming rate - the readings went up to over 4,000ppm."
The surgery now has its own G200 monitor so the staff can easily keep a check on their equipment and they are planning to roll out a monitoring program to cover all of their sites.
The Geotech G200 is designed to monitor background and breathing-zone levels of N2O in medical environments. It can measure N2O at 0-1,000ppm and can calculate time weighted averages, as well as EH40 occupational exposure limits. It is also highly effective in detecting N2O leaks.
MORE INFO. 108
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analyse,monitor ortestfor
Mercury?
28th July - 2nd August 2013, Edinburgh, Scotland Mercury as a Global Pollutant
The 11th International Conference on Mercury as a Global Pollutant returns after 10 years to Europe in 2013.
The event will attract over 1000 international delegates and will discuss scientific advances concerning mercury in the environment.
The 2013 meeting will be of particular importance as it coincides with the United Nations Environment Programme’s legally binding global treaty on Mercury.
Registration now open, sponsorship and exhibiting opportunities available.
www.mercury2013.com Follow us: @Hg_News
Porvair Sciences has chosen the forthcoming Pittcon 2013 exhibition to showcase its latest applications focused microplates and microplate equipment to scientists visiting the event in Philadelphia, PA. Visitors to Pittcon Booth 2854 will be able to meet Porvair's technical specialists, see the company's new MiniSeal II heat sealer, a wide selection of high quality microplates and have a preview of a new microplate evaporator - the UltraVap Mistral.
The new MiniSeal II from Porvair Sciences offers users unmatched reproducibility in sealing microplates of all types and sizes. Operating with a very high force ensures the MiniSeal II delivers high integrity sealing of deep well or even irregularly shaped microplates. Designed for ease-of-use and installation the compact MiniSeal II just requires plugging into a single electrical outlet to operate. Unlike larger and more expensive automated sealers the MiniSeal II does not require a compressed air supply to operate. Controlled through a splash-proof keyboard a MiniSeal II can be installed, up to temperature and sealing plates within minutes of unpacking.
Combining uncompromising high quality with an affordable price - Porvair Sciences will also display its extensive range of deep well, shallow well, storage, assay, SPE, protein precipitation and filtration microplates. Precisely manufactured in an ISO 9001 production cleanroom to comply with SLAS / ANSI dimensions ensures Porvair microplates are completely compatibility with all automated sample handling systems, microplate readers and washers.
+44 (0) 1727 858840
info@mercury2013.com
Reflecting Porvair's commitment to continuous technological innovation, the company will preview an all new robot-compatible automatic dry down station optimised for Tecan, Hamilton and Beckman robots. For many years, Porvair Sciences has led the field in nitrogen blow down evaporation. The UltraVap Mistral is a new version of Porvair's most popular sample concentrator making it even easier to integrate an automatic dry down step into your automated liquid handling protocol.
MORE INFO. 109
Meet the Microplate Specialists at Pittcon 2013
INTERNATIONAL LABMATE - MARCH 2013
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