XÁC ĐỊNH DƯ LƯỢNG METHYL PARATHION VÀ METHIDATHION TRONG MẪU TRÀ HOA VÀNG BẰNG PHƯƠNG PHÁP CHIẾT QuEChERS KẾT HỢP SẮC KÝ KHÍ-KHÓI PHỔ

Tóm tắt

In this work, a gas chromatography–mass spectrometry (GC-MS) coupled QuEChERS extraction
method has been introduced for the determination of methyl parathion and methidathion in the Golden
Camellia fresh-leaves. The target analytes were isolated from real matrix by using QuEChERS
technique. The extracted supernatants were analyzed on GC-MS system with an Agilent DB-5 MS
capillary column (30 m × 0.25 mm × 0.25 µm) at an optimized temperature program and helium gas.
The method detection limits (MDL) are of 20 and 17 ng/g for methyl parathion and methidathion,
respectively. The method quantitation limits (MQL) are of 67 and 57 ng/g for methyl parathion and
methidathion, respectively. Other important parameters of the analytical method were also validated
and presented. The method was applied for quantitation of methyl parathion and methidathion in
several Golden Camellia samples collected from the local markets in Hanoi.