ĐÁNH GIÁ KHẢ NĂNG PHÂN TÍCH DIOXIN TRONG MẪU NƯỚC BẰNG HỆ THỐNG THIẾT BỊ SẮC KÝ KHỐI PHỔ BA TỨ CỰC GC-MS/MS

Tóm tắt

Polychlorinated dibenzodioxins (PCDD) and Polychlorinated dibenzofurans (PCDF) are two groups of
toxic substances that belong to the group of persistent organic substances (POP) that are received
considerable attention and various analytical methods for determination of PCDD/Fs have been
developed. Analytical method using gas chromatography and high-resolution mass spectrometry (GCHRMS) system with high resolution and excellent sensitivity has long been considered as a standard
method for dioxins analysis. Simultaneously, the triple quadrupole gas chromatography-mass
spectrometry system (GC-MS/MS) with sensitivity equal to GC-HRMS and reduced operating and
maintenance costs, is being actively researched and developed for dioxin analysis as an alternative to
GC-HRMS. This paper reports the operating conditions and the results of dioxin analysis in the water
sample on the GC-MS/MS system, and direct comparison with the results obtained from GC-HRMS. Both
equipments demonstrated a good consistency in sensitivity and results of concentrations in water
samples, but the GC-MS/MS system showed superior Signal-to-Noise signal compared to GC-HRMS.
GC-MS/MS showed good repeatability and reproducibility and met the requirements of dioxin analysis
method, comparable to GC-HRMS. With the advantage of low initial cost and much lower operating and
maintenance costs than GC-HRMS, GC-MS/MS proved to be a potential method for analyzing dioxins in
water samples