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Popularization

GC Analysis – Part III. Mass Spectrometry Detection (MS)

18 August 2014

Alexis St-Gelais – Popularization My last post gave some details about a detection method commonly used in GC, the FID. Another detector that is widely used for the analysis of volatile compounds, including at PhytoChemia, is the mass spectrometer (MS). Unlike the FID, the MS is a complex detector. Typically, in GC-MS (although other modes

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Popularization

GC Analysis – Part II. The Flame Ionization Detector (FID)

11 August 2014

Alexis St-Gelais – Popularization The first part of this series dealt with the principles of separation of volatile molecules upon analysis by GC. After their separation, the analyst has yet to be able to detect molecules as they leave the capillary column, either to identify or quantify them. At PhytoChemia, we mainly use two types

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Popularization

Extracting Essential Oils in the Lab

4 August 2014

Alexis St-Gelais – Popularization Many of the samples we analyze are sent to us directly as essential oils. Sometimes, however, a customer wishes to compare plants before their extraction. He may also need a measure of oil yield so that he can plan ahead larger extractions. In these cases, we use two main extraction techniques, each with

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Activities and Events

New: Digital Signatures

15 July 2014

Alexis St-Gelais – News and events Laboratoire PhytoChemia emits most of its reports as electronic documents. A printed and manually signed version of your reports is available upon request. However, your PDFs can now have the same legal value as paper thanks to a digital signature system. As of July 2014, all of the PDF

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Popularization

GC Analysis – Part I. Separation Principles

30 June 2014

Alexis St-Gelais – Popularization I have explained in a previous post the main theoretical principles of chromatography. Today, I will detail one of its practical applications, widely used by PhytoChemia: gas chromatography (GC). It lends itself to the analysis of volatile molecules – that is to say molecules capable of passing to gas phase at

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Research notes

Analysis of Hydrosol of Quaking Aspen

17 June 2014

Alexis St-Gelais – Research Notes Two batches of young male flowers of quaking aspen (Populus tremuloides) were submitted to hydrodiffusion. The resulting hydrosol was analysed by gaz chromatography. The main constituents of sample #1 were 1,2-cyclohexanedione, characteristic of poplars, as well as benzyl alcohol and benzoic acid, while sample #2 was dominated by benzyl benzoate.

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Popularization

Chromatography

30 May 2014

Alexis St-Gelais – Popularization Chromatography refers to a wide range of separation techniques, frequently used in the field of analytical chemistry . The principles of chromatography allow PhytoChemia to achieve several of its analyzes. Chromatography is, for every chemist working in organic chemistry, a valuable tool. It brings together all techniques used for separating mixtures of

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Popularization

The importance of plant identification – Part 2

24 January 2014

Hubert Marceau – Popularization Figure 1: A. ursinum (source) In 2004, in the canton of Neufchâtel, Switzerland, clients from a restaurant who ordered fish with a bear’s garlic sauce, Allium ursinum (Figure 1), went on a painful adventure. Shortly after eating they started to have severe gastrointestinal troubles. After analysis, it was found that the sauce contained colchicine, a toxic

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