scholarly journals Development of Low Volume Air Sampling and Rapid Sample Preparation for the Determination of Atmospheric Gas-Phase Polycyclic Aromatic Hydrocarbons Using Styrene-Divinylbenzene Copolymer Resin Adsorbent

2010 ◽  
Vol 59 (8) ◽  
pp. 645-652 ◽  
Author(s):  
Aya Kobayashi ◽  
Yuki Kojima ◽  
Hiroshi Okochi ◽  
Toshio Nagoya
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Sample Preparation ◽  
Gas Phase ◽  
Aromatic Hydrocarbons ◽  
Air Sampling ◽  
Polycyclic Aromatic ◽  
Styrene Divinylbenzene ◽  
Low Volume

scholarly journals Optimization of a Low Volume Extraction Method to Determine Polycyclic Aromatic Hydrocarbons in Aerosol Samples

2021 ◽  
Vol 9 ◽  
Author(s):  
Caroline Scaramboni ◽  
Jordan Brizi Neris ◽  
Rita de Kássia Silva do Nascimento ◽  
Natasha Leandra Chiaranda da Rosa ◽  
Jonatas Schadeck Carvalho ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Extraction Method ◽  
Reference Method ◽  
Atmospheric Particulate Matter ◽  
Component Mixture ◽  
Polycyclic Aromatic ◽  
Low Volume ◽  
Optimized Conditions

This work describes the optimization of an extraction method for the determination of polycyclic aromatic hydrocarbons (PAHs) and their nitro- and oxy-PAH derivatives in atmospheric particulate matter (PM) samples, and demonstrates that this method is also effective for the determination of levoglucosan. The optimization of the extraction solvents was performed using a three-component mixture design with the solvents dichloromethane, methanol, and acetonitrile. The number of extractions, volume of solvent, and duration of extraction in an ultrasonic bath were optimized using a full factorial design followed by a central composite design. The analyses were performed by gas chromatography coupled with mass spectrometry. The optimized conditions of the method were three extractions using 4.0 ml of acetonitrile, with ultrasonication for 34 min. The proposed method presented good linearity (r > 0.990) and acceptable precision for low (100 ng ml−1, RSD: 1–16%), medium (300 ng ml−1, RSD: 1–19%), and high (500 ng ml−1, RSD: 2–16%) concentrations of PAHs. The limits of quantification for different PAHs ranged from 10 to 50 ng ml−1, which were suitable for atmospheric PM. Assessment of the method using sample matrix spiking/recovery assays, as well as use of a reference method, showed good recoveries for levoglucosan and for most of the PAHs and their derivatives, except for the most volatile compounds, which were lost during the evaporation of the solvent. The results for PM samples extracted by the optimized method and the reference method were in good agreement. The proposed method required 97% less solvent than the reference method, shortened the analysis time by 85%, and proved to be accurate and precise for the determination of at least 27 PAHs and their derivatives present in PM samples collected with a low-volume sampler.

scholarly journals AN INNOVATIVE APPROACH TO ENVIRONMENTAL SAMPLE PREPARATION FOR DETERMINATION OF POLYCYCLIC AROMATIC HYDROCARBONS BY GC-MS USING NEW SORBENTS IN QUECHERS TECHNIQUE

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
VESNA STANKOV JOVANOVIĆ ◽  
VIOLETA MITIĆ ◽  
JELENA CVETKOVIĆ ◽  
MARIJA ILIĆ ◽  
SLOBODAN ĆIRIĆ ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Carbon Black ◽  
Sample Preparation ◽  
Aromatic Hydrocarbons ◽  
Diatomaceous Earth ◽  
Accurate Determination ◽  
Solvent Mixtures ◽  
Polycyclic Aromatic ◽  
Solvent Systems

Polycyclic aromatic hydrocarbons (PAHs) have been considered as environmental pollutants of a great concern. Regardless of the method of quantitative analysis to be applyied, sample preparation is essential for the accurate determination of PAHs. Due to the extreme complexity of the soil samples, caused primarily by the presence of hundreds of compounds, many of them have similar physical and / or chemical properties as well as the analyzed compounds, and preparation of environmental samples for analysis is crucial for validity of the PAHs analysis. No matter which method will be applied for later analysis, sample preparation has to fulfill a number of conditions such as, adequate selectivity, efficiency, availability, easy to perform, short duration of the procedure. QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) method of sample preparation is a relatively new method that uses different sorbents and solvent systems. In this paper, the possibility of application of sorbents (diatomaceous earth, clinoptilolite and carbon black), which are not usually used in QuEChERS clean-up step of sample preparation, using 3 different solvent mixtures hexane / acetone (1:1, v / v) cyclohexane / acetone (1: 1, v / v) and acetonitrile / methanol (2:1, v / v) was investigated. Standard solutions of PAHs were treated with selected sorbents and solvent systems in all combinations, and then analyzed by GC-MS method. The overall accuracy of the method varied depending of compound and used sorbent/solvent system, while precision of the method was constantly good. Highest mean recovery for all PAHs (49.22%) was recorded for clinoptilolite, hexane / acetone combination. Diatomaceous earth showed lower recoveries in comparison with clinoptilolite, with all solvent systems, while recoveries for carbon black were almost zero. Among tested sorbents, clinoptilolite was identified as good starting sorbent which characteristics could be modified with aim to achieve higher accuracy, precision and selectivity of the method, and enable its new application in analytical chemistry. Key words: PAHs, QuEChERS, sorbents, GC-MC.

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