Phân tích nhóm hợp chất peflo hóa trong mẫu bèo tây bằng phương pháp sắc ký lỏng khối phổ hai lần kết hợp với xử lí mẫu bằng chiết dung môi hỗ trợ bởi siêu âm và chiết pha rắn

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Tác giả: Hồng Anh Dương, Thanh Huyền Lê, Hùng Việt Phạm, Thị Vĩ Phùng, Thị Kim Trương

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Nguyễn Tất Thành, 2023

Mô tả vật lý: tr.8

Bộ sưu tập: Metadata

ID: 369679

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15 hợp chất peflo hóa thuộc nhóm axit peflocacboxylic và muối pefloankyl sunfonat (chứa 4 đến 12 nguyên tử C trong phân tử) trong mẫu bèo tây đã được phân tích bằng sắc ký lỏng ghép nối khối phổ 2 lần (LC-MS/MS) kết hợp với xử lí mẫu bằng chiết dung môi hỗ trợ bởi siêu âm và chiết pha rắn. Điều kiện chiết dung môi đã được tối ưu hóa là sử dụng 5mL MTBE, siêu âm 10 phút, chiết 3 lần lặp lại. Cột chiết pha rắn WAX đã được lựa chọn sau khi khảo sát và so sánh hiệu quả chiết pha rắn sử dụng hai loại cột WAX và C18. Kết quả thẩm định phương pháp đã tối ưu hóa cho thấy, đối với mẫu thực vật, cả 15 PFCs được phân tích cho hiệu suất thu hồi tốt từ 71 tới 116% (1.2-6.6% CV). Giới hạn định lượng đối với 15 PFCs trong bèo tây dao động từ 0,30 đến 0,54 ng/g.Fifteen perfluorinated compounds, including perfluorocarboxylic acids and perfluoroalkyl sulfonate salts (with 4 to 12 carbon atoms in their structure) in Eichhornia crassipes (Mart.) Solms samples underwent analysis using Liquid Chromatography- tandem Mass Spectrometry (LC-MS/MS). This analysis was conducted alongside sample preparation employing ultrasound-assisted extraction and solid-phase extraction. The optimization of solvent extraction involved the use of 5 ml of methyl tert-butyl ether (MTBE), 10 minutes of sonication, and three repeated extraction cycles. The weak anion exchange (WAX) cartridge was selected after evaluating and comparing the solid-phase extraction efficiencies of both WAX and C18 cartridges. The evaluated method demonstrated successful analysis of all 15 PFCs in plant samples, achieving favorable recoveries ranging from 71 to 116% (with a coefficient of variation of 1.2-6.6%). The quantification limits for these 15 PFCs in Eichhornia crassipes (Mart.) Solms samples ranged between 0.30 to 0.54 ng/g.

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