Facile and robust dual interaction modification of hexadecyldimethyl amine magnetic nanoparticles for the ultrasensitive analysis of perfluorinated compounds in environmental water

2015 ◽  
Vol 38 (8) ◽  
pp. 1394-1401 ◽  
Author(s):  
Xiaotong Liang ◽  
Ying Zou ◽  
Shengquan Liu ◽  
Chunyan Chen ◽  
Jianping Wang ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Environmental Water ◽  
Perfluorinated Compounds ◽  
Interaction Modification

Determination of Organophosphorous Pesticides in Environmental Water Samples Using Surface-Engineered C18 Functionalized Silica-Coated Core-Shell Magnetic Nanoparticles–Based Extraction Coupled with GC-MS/MS Analysis

2017 ◽  
Vol 100 (3) ◽  
pp. 804-809 ◽  
Author(s):  
Neha Srivastava ◽  
Supriya Kumari ◽  
Kishore Nair ◽  
Samsul Alam ◽  
Syed K Raza
Keyword(s):  
Magnetic Nanoparticles ◽  
Water Samples ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Core Shell ◽  
Aqueous Sample ◽  
Functionalized Silica ◽  
Method Performance ◽  
Ms Analysis

Abstract The present paper depicts a novel method based on magneticSPE (MSPE) for the determination of organophosphorus pesticides (OPs) such as phorate, malathion, and chlorpyrifos in environmental water samples. In this study, C18 functionalized silica-coated core-shell iron oxide magnetic nanoparticles (MNPs) were used as a surface-engineered magnetic sorbent for theselective extraction of pesticides from aqueous samples, followed by GC-MS and GC–tandem MS analysis for confirmative determination of the analytes. Various important method parameters, including quantity of MNP adsorbent, volume of sample, effective time for extraction, nature of the desorbing solvent, and pH of the aqueous sample, were investigated and optimized to obtain maximum method performance. Under the optimized instrumental analysis conditions, good linearity (r2 value ≥0.994) was achieved at the concentration range of 0.5–500 μg/L. Recoveries were in therange of 79.2–96.3 and 80.4–97.5% in selective-ion monitoring and multiple reaction monitoring (MRM) modes, respectively, at the spiking concentrations of 1, 5, and 10 μg/L. MRM mode showed better sensitivity, selectivity, and low-level detection (0.5 μg/L) of analytes. The novel MSPE method is a simple, cheap, rapid, and eco-friendly method for the determination of OPs in environmental water samples.

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