Preparation of a Novel Magnetic Stir Bar for the Pretreatment of the Plasticizers in Lake Water

Abstract:

An in-situ polymerization method was used for the preparation of a novel stir bar based on neodymium magnet (Nd₂Fe₁₄B) powders. The processes were carried out by several steps including the enwrapping of Nd₂Fe₁₄B, the modification of the enclosed Nd₂Fe₁₄B, and the form of organic polymers on the surface of the modified powders. It was successfully used to enrich the plasticizers in water sample by stir bar sorptive extraction (SBSE). The experimental conditions for SBSE, such as the choice of extraction sorvents, salt concentration, extraction and desorption time were optimized in detail. Coupled to high performance liquid chromatography (HPLC), the recoveries of dibutyl phthalate (DBP), dimethyl phthalate (DMP), diethyl phthalate (DEP) were 89.2%~92.1%, 91.9%~96.6% and 94.3%~96.7%, respectively; the linear relationships between the concentration 5 μg/L and 800 μg/L for DBP were obtained; the limits of detection ranged from 0.09 μg/L to 0.21 μg/L in the optimal conditions.

• Periodical: Advanced Materials Research (Volumes 989-994)
• Pages: 164-167
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.989-994.164
• Online since: July 2014
• Authors: Rui Feng*
• Keywords: High Performance Liquid Chromatography, Plasticizer, Polymerization, Stir Bar

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