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Case Study airmoPAH for PAH measurement in ambient air

Case Study airmoPAH for PAH measurement in ambient air
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Case Study airmoPAH for PAH measurement in ambient air - 1

Case Study N°AA8 – Ambient air monitoring – airmoPAH – updated:29.10.15 Case Study Ambient Air Monitoring Applications Ambient air and emissions monitoring of Polycyclic Aromatic Hydrocarbons – airmoC10-C20+ Context & Challenges Polycyclic Aromatic Hydrocarbons (PAHs) are a group of over 100 different chemicals that are known to be formed typically during incomplete combustion of organic matter at high temperature. Their major sources in the atmosphere include industrial processes, vehicle exhausts, waste incinerations, and domestic heating emissions. Due to their carcinogenic/mutagenic effects, 16 PAHs are currently listed as priority air pollutants. Chromatotec® Solutions Actual analytical methods dedicated to monitor PAHs require multistep sampling preparations and are not suited for continuous monitoring. Automatic Thermal Desorption-Gas chromatography equipped with flame ionization detector (AUTO-TD-GC-FID) is the standard method for the monitoring of volatile and semi-volatile hydrocarbons. This technique allows for identifying and quantifying continuously hydrocarbons from ethane to naphthalene. The main goal of this work is to implement a new and simple method for sampling and determination of PAHs in gas and solid phase in air by using thermal desorption technique followed by gas chromatography equipped with two detectors: a flame ionization detector and a Mass spectrometer. A detailed study was carried out to optimize the experimental method in each of its phases, including sampling, thermal desorption, analytical separation, and detection. First, the limits of use of the analytical system were determined during the laboratory phase using liquid standards of the 16 PAHs. sales@chromatotec.com www.chromatotec.com

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Case Study airmoPAH for PAH measurement in ambient air - 2

Case Study N°AA8 – Ambient air monitoring – airmoPAH – updated:29.10.15 Technical information and results Analytical conditions: airmoC10-C20+ Sampling: 1000 ml Carrier gas: hydrogen ( 460 hPa) Column: MXT 30CE, film thickness: 1 µm, id: 0.28 mm, length: 30 m Amplification: high (level 3) Figure 1 – Substance table Cycle duration: 30 to 60 min Detection range: from few ng/m 3 to µg/m3 A typical chromatogram of PAH sample is shown in Figure 3. The results are displayed using Vistachrom software. All results can be re-treated using peak viewer software. On the chromatogram, one can see that...

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