Activated carbon/diatomite‐based magnetic nanocomposites for magnetic solid‐phase extraction of S ‐phenylmercapturic acid from human urine

2020 ◽  
Vol 34 (7) ◽  
Author(s):  
Xiaoyue Shan ◽  
Siwei Tan ◽  
Yanpeng Shi ◽  
Ji Shao ◽  
Kewen Su ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Solid Phase Extraction ◽  
Human Urine ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Magnetic Nanocomposites ◽  
Phase Extraction ◽  
Magnetic Solid

Novel restricted access material combined to molecularly imprinted polymer for selective magnetic solid-phase extraction of estrogens from human urine

2019 ◽  
Vol 149 ◽  
pp. 104043 ◽  
Author(s):  
Hanna Leijoto de Oliveira ◽  
Bruna Carneiro Pires ◽  
Leila Suleimara Teixeira ◽  
Laíse Aparecida Fonseca Dinali ◽  
Nathália Soares Simões ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Molecularly Imprinted Polymer ◽  
Human Urine ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Restricted Access Material ◽  
Magnetic Solid

scholarly journals Application of an Activated Carbon-Based Support for Magnetic Solid Phase Extraction Followed by Spectrophotometric Determination of Tartrazine in Commercial Beverages

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
José A. Rodríguez ◽  
Karen A. Escamilla-Lara ◽  
Alfredo Guevara-Lara ◽  
Jose M. Miranda ◽  
Ma. Elena Páez-Hernández
Keyword(s):  
Activated Carbon ◽  
Solid Phase Extraction ◽  
Limit Of Detection ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Optimal Conditions ◽  
Magnetic Solid ◽  
Nonalcoholic Beverages

A method is presented for magnetic solid phase extraction of tartrazine from nonalcoholic beverages. The method involves the extraction and clean-up by activated carbon covered with magnetite dispersed in the sample, followed by the magnetic isolation and desorption of the analyte by basified methanol. The tartrazine eluted from the magnetic support was determined by spectrophotometry. Under optimal conditions, the linear range of the calibration curve ranges from 3 to 30 mg L−1, with a limit of detection of 1 mg L−1. The method was validated by comparing the results with those obtained by HPLC. A precision of<5.0% was obtained in all cases and no significant differences were observed(P<0.05).

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