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PRODID:https://murmitoyen.com/events/vanille/udem/
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UID:69d3ccfae8363
DTSTAMP:20260406T111050
DTSTART:20120111T110000
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20120111T123000
URL:https://murmitoyen.com/events/vanille/udem/detail/69789
LOCATION:Université de Montréal - Pavillon J.-Armand-Bombardier\, 5155\, 
 chemin de la rampe \, Montréal\, QC\, Canada\, H3T 2B2
SUMMARY:Conférence du professeur Chris Metcalfe (Trent)
DESCRIPTION:Titre : Challenges and Solutions for Analyzing 'Down the Drain'
  Chemicals.La conférence sera prononcée par le professeur Chris Metcalf
 e de l'Institute for Watershed Science de Trent University (Environmental 
 and Resource Studies Program). Elle sera donnée en anglais.Résumé : Th
 ere are a variety of chemicals that we flush down the drain that wind up p
 assing through municipal wastewater treatment plants and into the environm
 ent. These chemicals are constituents of “personal care products” such
  as cosmetics\, soaps\, shampoos\, toothpaste and mouthwash\, prescription
  and non-prescription drugs that we excrete into sewage\, and nanoparticle
 s that are used in various household products and cosmetics. These chemica
 ls enter the environment when municipal wastewater is discharged into rive
 rs and lakes\, and when sewage sludge (i.e. biosolids) is applied onto agr
 icultural land as a soil treatment.  There are several challenges associa
 ted with analyzing these chemicals in water and wastewater. They are typic
 ally present in these matrixes at low (parts per billion or parts per tril
 lion) concentrations\, and the environmental matrix often interferes with 
 the analysis. For the analysis of water soluble contaminants\, such as per
 sonal care products and pharmaceuticals\, liquid chromatography with tande
 m mass spectrometry (LC-MS/MS) is the preferred analytical method\, but th
 is instrumentation is subject to suppression or enhancement of ionization 
 of the target analytes as a result of interferences from the sample matrix
 .  At Trent University\, we have developed methods to compensate for thes
 e matrix effects using stable isotope surrogates as internal standards. Fo
 r the analysis of nanomaterials such as nanosilver\, chromatographic separ
 ation of the nanoparticles according to size is not feasible because of in
 teractions between the particles and the chromatographic stationary phase.
   At Trent University\, we have developed asymmetric flow field flow frac
 tionation separation techniques coupled to ICP-MS (AF4-ICP-MS) to analyze 
 nanosilver in water and wastewater.   The advantages and disadvantages o
 f these analytical techniques will be discussed within the context of moni
 toring for down the drain chemicals in the environment. Information suppl
 émentaire
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TZID:America/Montreal
X-LIC-LOCATION:America/Montreal
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