NGHIÊN CỨU HẤP PHỤ VÀ LÀM GIÀU CHỌN LỌC MALACHITE GREEN TRÊN VẬT LIỆU POLIME IN DẤU PHÂN TỬ (MIP) ỨNG DỤNG TRONG PHÂN TÍCH THỦY SẢN

Tóm tắt

Malachite Green is a dye with the ability to treat diseases caused by parasites, fungi, and bacteria in aquatic
animals. However, due to its toxicity to humans, it has been banned in most countries worldwide, especially
in Vietnam. In this study, we synthesized molecularly imprinted polymer (MIP) materials selective for
Malachite Green (MG) through a copolymerization reaction between the monomer methacrylic acid (MAA)
and the cross-linking agent ethylene glycol dimethacrylate (EGDMA), initiated by azobisisobutyronitrile
(AIBN) in an acetonitrile:methanol mixture (3:1, v/v). The maximum adsorption capacity was 23.81 mg. g
1
at optimum conditions, pH 5.0, m = 7mg, t=40 min and the imprinted factor max was 2.3. High adsorption
selectivity of MG over other dyes having the same blue color such as Blue Briliant, Fast Green was
obtained. The synthesized MIP had enrichment factor of 50 times with high desortpion efficiency of 95.31%;
as well as good reusablity of at least 5 times. The application of material to enrich MG in fish samples
provided a recovery efficiency reaching 94.9% to 107.3%. The obtained results reflected the selective
analytical capability and enrichment potential of MIP for MG.