Analysis of chlorophenols, bisphenol-A, 4-tert-octylphenol and 4-nonylphenols in soil by means of ultrasonic solvent extraction and stir bar sorptive extraction with in situ derivatisation

2009 ◽  
Vol 1216 (32) ◽  
pp. 5955-5961 ◽  
Author(s):  
Julio Llorca-Pórcel ◽  
Marta Martínez-Parreño ◽  
Esther Martínez-Soriano ◽  
Ignacio Valor
Keyword(s):  
Solvent Extraction ◽  
Bisphenol A ◽  
Stir Bar Sorptive Extraction ◽  
Sorptive Extraction

Cyromazine imprinted polymers for selective stir bar sorptive extraction of melamine in animal feed and milk samples

The Analyst ◽  
2015 ◽  
Vol 140 (12) ◽  
pp. 4057-4067 ◽  
Author(s):  
Wenying Fan ◽  
Mingqi Gao ◽  
Man He ◽  
Beibei Chen ◽  
Bin Hu
Keyword(s):  
Molecularly Imprinted Polymer ◽  
Animal Feed ◽  
Stir Bar Sorptive Extraction ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Milk Samples ◽  
Sorptive Extraction ◽  
Dummy Template

A molecularly imprinted polymer coated stir bar was prepared using a self-designed polytetrafluoroethylene mold andin situpolymerization, with cyromazine as dummy template for target melamine.

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

2014 ◽  
Vol 989-994 ◽  
pp. 164-167
Author(s):  
Rui Feng
Keyword(s):  
High Performance ◽  
Dibutyl Phthalate ◽  
In Situ Polymerization ◽  
Stir Bar Sorptive Extraction ◽  
Dimethyl Phthalate ◽  
Experimental Conditions ◽  
Sorptive Extraction ◽  
Linear Relationships ◽  
Polymerization Method

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.

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