Magnetic polyethyleneimine functionalized reduced graphene oxide as a novel magnetic solid-phase extraction adsorbent for the determination of polar acidic herbicides in rice

2017 ◽  
Vol 949 ◽  
pp. 23-34 ◽  
Author(s):  
Na Li ◽  
Juan Chen ◽  
Yan-Ping Shi
Keyword(s):  
Graphene Oxide ◽  
Solid Phase Extraction ◽  
Reduced Graphene Oxide ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Reduced Graphene ◽  
Acidic Herbicides ◽  
Magnetic Solid

scholarly journals Magnetic Solid-Phase Extraction Based on Magnetic Sulfonated Reduced Graphene Oxide for HPLC–MS/MS Analysis of Illegal Basic Dyes in Foods

Molecules ◽  
2021 ◽  
Vol 26 (24) ◽  
pp. 7427
Author(s):  
Shibo Cui ◽  
Xinwu Mao ◽  
Haijing Zhang ◽  
Haowei Zeng ◽  
Zihao Lin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solid Phase Extraction ◽  
Reduced Graphene Oxide ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Reduced Graphene ◽  
Basic Dyes ◽  
Magnetic Solid

In this study, a magnetic solid-phase extraction (MSPE) method coupled with High-Performance Liquid Chromatography Mass Spectrometry (HPLC–MS/MS) for the determination of illegal basic dyes in food samples was developed and validated. This method was based on Magnetic sulfonated reduced graphene oxide (M-S-RGO), which was sensitive and selective to analytes with structure of multiaromatic rings and negatively charged ions. Several factors affecting MSPE efficiency such as pH and adsorption time were optimized. Under the optimum conditions, the calibration curves exhibited good linearity, ranging from 5 to 60 µg/g with correlation coefficients >0.9950. The limits of detection of 16 basic dyes were in the range of 0.01–0.2 µg/L. The recoveries ranged from 70% to 110% with RSD% < 10%. The results indicate that M-S-RGO is an efficient and selective adsorbent for the extraction and cleanup of basic dyes. Due to the MSPE procedures, matrix effect and interference were eliminated in the analysis of HPLC–MS/MS without the matrix-matched standards. Thus, validation data showed that the proposed MSPE–HPLC–MS/MS method was rapid, efficient, selective, and sensitive for the determination of illegal basic dyes in foods.

Determination of trace rhodamine B by spectrofluorometry and magnetic solid phase extraction based on a 3D reduced graphene oxide composite

2017 ◽  
Vol 9 (37) ◽  
pp. 5433-5440 ◽  
Author(s):  
Jun Yan ◽  
Jian-Mei Cen ◽  
Xue-Cai Tan ◽  
Shao-Fen Tan ◽  
Ye-Yu Wu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solid Phase Extraction ◽  
Reduced Graphene Oxide ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Oxide Composite ◽  
Reduced Graphene ◽  
Magnetic Solid ◽  
Pre Treatment

Sample pre-treatment by magnetic solid phase extraction based on a 3D reduced graphene oxide composite.

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