Concentration and determination of polycyclic aromatic hydrocarbons in aqueous samples on graphitized carbon black

1980 ◽  
Vol 198 (2) ◽  
pp. 143-149 ◽  
Author(s):  
A. Lagana ◽  
B.M. Petronio ◽  
M. Rotatori
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Carbon Black ◽  
Aromatic Hydrocarbons ◽  
Graphitized Carbon Black ◽  
Aqueous Samples ◽  
Graphitized Carbon ◽  
Polycyclic Aromatic

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.

scholarly journals UNSUITABILITY OF THE ZEK/AFPS TEST METHOD FOR THE DETERMINATION OF POLYCYCLIC AROMATIC HYDROCARBONS IN CARBON BLACK

2018 ◽  
Vol 91 (1) ◽  
pp. 225-250
Author(s):  
Stephan Hamm ◽  
Kai Hölscher ◽  
Thomas M. Gruenberger ◽  
Gilles Moninot ◽  
Wolfgang Örtel ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Carbon Black ◽  
Aromatic Hydrocarbons ◽  
Soxhlet Extraction ◽  
Test Method ◽  
Gas Chromatography Mass Spectrometry ◽  
Specific Method ◽  
Relative Distribution ◽  
Polycyclic Aromatic

ABSTRACT The Zentraler Erfahrungsaustauschkreis/Ausschuss für Produktsicherheit (ZEK/AfPS) analytical method established within the Geprüfte Sicherheit (GS) quality label for the determination of 18 polycyclic aromatic hydrocarbons (PAHs) in consumer articles made out of rubber or plastic was demonstrated as unsuitable for carbon black (CB). High molecular weight PAHs are not efficiently extracted from CB through the ZEK/AfPS method when compared with the CB-specific method consisting of 48 h Soxhlet extraction. The low extraction efficiency correlates with the low recovery or loss of the deuterated isotopologues added prior to the 1 h ZEK/AfPS ultrasound extraction of the native PAHs. These phenomena are dependent on the type and concentration level of the various PAHs and are attributed to the relative distribution and adsorption of the native and deuterated PAHs between the CB surface and the toluene phase. These findings are based on comparative extractions of various carbon black grades, use of a larger set of deuterated isotopologues for gas chromatography/mass spectrometry (GC/MS) quantification of native PAHs, and monitoring of the recoveries of the deuterated PAHs added prior to or after the ZEK/AfPS extractions.

Sign in / Sign up

Export Citation Format

Share Document