Browsing University of Waterloo by Author "Grandy, Jonathan J."
Now showing items 1-6 of 6
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Development and validation of eco-friendly strategies based on thin film microextraction for water analysis
Piri-Moghadam, Hamed; Gionfriddo, Emanuela; Grandy, Jonathan J.; Alam, Md. Nazmul; Pawliszyn, Janusz (Elsevier, 2018-12-07)The aim of the current study is the establishment of Green Analytical Chemistry strategies for water analysis by elimination/reduction of hazardous chemicals, energy consumption, and waste generation throughout the entire ... -
Development of a Carbon Mesh Supported Thin Film Microextraction Membrane As a Means to Lower the Detection Limits of Benchtop and Portable GC/MS Instrumentation
Grandy, Jonathan J.; Boyaci, Ezel; Pawliszyn, Janusz (American Chemical Society, 2015-12-18)In this work, a durable and easy to handle thin film microextraction (TFME) device is reported. The membrane is comprised of poly(divinylbenzene) (DVB) resin particles suspended in a high-density polydimethylsiloxane (PDMS) ... -
Development of Field Portable Solid Phase Microextraction Samplers for Performing On-site Environmental Analysis
Grandy, Jonathan J. (University of Waterloo, 2018-04-30)Since being introduced in 1989 solid phase microextraction (SPME) techniques have continually evolved from within the analytical chemistry community due in large part to their clean, portable and easy to handle design. It ... -
Inter-laboratory validation of a thin film microextraction technique for determination of pesticides in surface water samples
Piri-Moghadam, Hamed; Gionfriddo, Emanuela; Rodriguez-Lafuente, Angel; Grandy, Jonathan J.; Lord, Heather L.; Obal, Terry; Pawliszyn, Janusz (Elsevier, 2017-04-29)The primary goal of the present study is the inter-laboratory evaluation of a thin film microextraction (TFME) technique to be used as an alternative approach to liquid-liquid extraction (LLE). Polydimethylsiloxane/ ... -
Introducing a mechanically robust SPME sampler for the on-site sampling and extraction of a wide range of untargeted pollutants in environmental waters
Grandy, Jonathan J.; Lashgari, Maryam; Vander Heide, Harmen; Poole, Justen J.; Pawliszyn, Janusz (Elsevier, 2019-09)The present study introduces a mechanically robust, sealable SPME sampler for the on-site sampling and extraction of a wide range of untargeted pollutants in environmental waters. Spray-coating and dip coating methodologies ... -
Solid Phase Microextraction On-Fiber Derivatization Using a Stable, Portable, and Reusable Pentafluorophenyl Hydrazine Standard Gas Generating Vial
Poole, Justen J.; Grandy, Jonathan J.; Gomez-Rios, German Augusto; Gionfriddo, Emanuela; Pawliszyn, Janusz (American Chemical Society, 2017-07-05)Solid phase microextraction (SPME) on-fiber derivatization methods have facilitated the achievement of lower detection limits and targeted analysis of various substances that exhibit poor chromatographic behavior, thermal ...