12.07.2015 Views

Download Magazine

Download Magazine

Download Magazine

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

For more information on these products contact your local VWR sales office, sendan e-mail to chromjournal@eu.vwr.com or visit our website www.vwr.comthis shows that with the SCat SafetyCapa significant reduction, almost to 0, of themethanol concentration in the test cabinet wasachieved, as a result falling significantly shortof the workplace exposure limit tRGS 900of 270 mg/m 3 . In contrast to this, when theSCAT SafetyCap was not fitted, the methanolconcentration in the test cabinet was 630 -660 mg/m 3 , which is significantly higher thanthe workplace exposure limit, resulting in anexposure which can affect the health of theemployees in the laboratory.Similar results were achieved in the test chambermesurements with acetonitrile. Using a SCatSafetyWasteCap, a concentration of 1 - 5 mg/m 3could be observed, while on the contrary, withthe bottle without any SafetyCap, the acetonitrileconcentration, despite a continual air change,was 730 - 800 mg/m 3 .Concen ntration (mg/m 3 )9008007006005004003002001000Acetonitrile emission in test chamber1 3 7Solvent bottle withoutSafetyCapSolvent bottle withSafetyCapWorkplace exposure limita comparison of the test cabinet emission resultswith the acetonitrile limit value to tRGS 900 of34 mg/m 3 shows that without the SCat cap, theacetonitrile concentration is significantly higherthan the workplace exposure limit. In contrast tothis, when the SCAT SafetyCap is fitted to thebottle of solvent, the acetonitrile concentration issignificantly minimised, so that it is considerablylower than the workplace exposure limit to tRGS900 of 34 mg/m 3 .DayssummARyIn summary, it is evident that the solvent emissions could be significantly reduced by the SCATSafetyCaps. In this respect, the use of SCat SafetyCaps can be expected to lead to a clear reductionof the exposure of solvents in the atmosphere in a laboratory.as a result the reduction in the solvent concentration in the atmosphere can be assumed to beof a similar proportion as was described above, leading to a significantly lower health risk for theemployees concerned.Furthermore, SCAT SafetyCaps significantly minimise the risk of contamination of solvent-free blanksamples in laboratories, so the use of SCat SafetyCaps can also be considered a measure ofquality assurance.chromJournal Issue 12 I 2012 I VWR InteRnatIonal 9

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!