| Title: | A new reliable method for dimethyl sulfoxide analysis in wastewater: dimethyl sulfoxide in Philadelphia's three water pollution control plants |
| Address: | "Bureau of Laboratory Services, Philadelphia Water Department, 1500 E. Hunting Park Ave., Philadelphia, PA 19124, USA. xianhao.cheng@phila.gov" |
| ISSN/ISBN: | 1061-4303 (Print) 1061-4303 (Linking) |
| Abstract: | "A simple but reliable procedure was developed to analyze dimethyl sulfoxide (DMSO) in wastewater. The isotope DMSO_d6 was used as the internal standard to ensure accuracy. The DMSO was reduced with stannous chloride and measured as dimethyl sulfide (DMS) with purge-and-trap gas chromatography/mass spectrometry. The method detection limit was at the sub-microgram-per-milliliter level; precision, as measured by standard deviation, was better than +/- 0.5%; and the recoveries were between 95 and 105% at the level of 2 microg/mL. The procedure could use standard analytical instrumentation used for volatile organic compound analysis. A field study was conducted to validate the method and quantify DMSO concentration range in the three water pollution control plants (WPCPs) in the city of Philadelphia, Pennsylvania. Results showed that, when a local chemical facility discharged, DMSO concentration could be as high as 12 mg/L in the influent to a WPCP. This would lead to the formation of a toxic 'canned corn' DMS odor during the treatment processes" |
| Keywords: | "Calibration Clinical Laboratory Techniques Feasibility Studies Philadelphia Reducing Agents/analysis Sensitivity and Specificity Sewage/*chemistry Sulfides/*analysis Waste Disposal, Fluid/*methods Waste Management/methods;" |
| Notes: | "MedlineCheng, Xianhao Peterkin, Earl eng Evaluation Study 2007/06/19 Water Environ Res. 2007 May; 79(5):571-5. doi: 10.2175/106143006x123094" |
