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Nguyễn Kim Thùy(1), Nguyễn Thị Thu, Nghiêm Xuân Trường, Hà Hải Ngọc, Giáp Thị Hợp, Phạm Tiến Đức(2)

ĐÁNH GIÁ HIỆU QUẢ CỦA PHƯƠNG PHÁP CHIẾT SIÊU ÂM VÀ CHIẾT SOXHLET TRONG XỬ LÝ MẪU TRẦM TÍCH ĐỂ PHÂN TÍCH CÁC HYDROCACBON ĐA VÒNG THƠM (PAHs)

EVALUATION OF THE EFFECTIVENESS OF ULTRASONIC AND SOXHLET EXTRACTIONS IN PREPARING SEDIMENT SAMPLES FOR DETERMINATION OF POLYCYCLIC AROMATIC HYDROCARBONS (PAHs)

Tạp chí Phân tích Hóa, Lý và Sinh học

2024

1

01

Polycyclic aromatic hydrocarbons (PAHs) are a family of polycyclic aromatic organic substances composed of several benzene rings attached directly to each other. The present study evaluated the extraction efficiency of ultrasonic and soxhlet extractions in preparing sediment samples for the determination of PAHs by gas chromatography coupled with mass spectrometry (GC-MS). We found that both ultrasonic extraction and soxhlet extraction techniques met the AOAC requirements demonstrating repeatability and recovery efficiencies of surrogate standards >60% and analyte recovery efficiencies >73% with 16 PAHs. The soxhlet extraction method indicated higher precision than ultrasonic extraction. The statistical calculation results also indicate that at the research concentration level, the average values of the two different sample treatment methods are not statistically significant with a statistical reliability of 95% (P> 0.05).

Polycyclic aromatic hydrocarbons (PAHs) are a family of polycyclic aromatic organic substances composed of several benzene rings attached directly to each other. The present study evaluated the extraction efficiency of ultrasonic and soxhlet extractions in preparing sediment samples for the determination of PAHs by gas chromatography coupled with mass spectrometry (GC-MS). We found that both ultrasonic extraction and soxhlet extraction techniques met the AOAC requirements demonstrating repeatability and recovery efficiencies of surrogate standards >60% and analyte recovery efficiencies >73% with 16 PAHs. The soxhlet extraction method indicated higher precision than ultrasonic extraction. The statistical calculation results also indicate that at the research concentration level, the average values of the two different sample treatment methods are not statistically significant with a statistical reliability of 95% (P> 0.05).

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