Author Archives: david Widory

With improved refining techniques and ever-growing popularity among hobbyists, wine and other food products have become the target of multiple frauds worldwide. Within the last 30 years, the analysis of stable and radiogenic isotopes have demonstrated their added value as … Continue reading →

The isotope ratios of strontium (Sr) and lead (Pb) in water derive from local geology and their isotopic signature can be linked to the age and type of underlying bedrocks and soils (if applicable). Both elements are transferred to human … Continue reading →

Interpreting fluxes of dissolved elements, especially trace metals, transported by rivers requires a precise knowledge of their numerous potential sources, both natural or anthropogenic. Identifying and quantifying the impact of these sources at various scales helps understanding fluviatil systems and, … Continue reading →

Glyphosate [(N-phosphonomethyl)glycine] is the main active molecule of the most used worldwide herbicide for weed and vegetation control. Its importance recently exploded after the introduction of transgenic glyphosate-resistant (GR) crops in 1996. In Québec only, over 1 million hectares of … Continue reading →

Due to its incidence on Human health, air pollution is a major source of concern, and is now a critical societal issue for most countries. The need to evaluate, monitor and understand the parameters controlling the quality of our atmosphere … Continue reading →

The origin of particles within the atmosphere has long been subject to debate. The problem is even more critical in urban areas, due to their potential harmful impact on public health. Natural or anthropogenic, mineral or organic? These are some of … Continue reading →