Journal
TALANTA
Volume 201, Issue -, Pages 266-270Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2019.04.005
Keywords
Stir-bar sorptive dispersive microextraction; Magnetic cellulose nanoparticles; Polychlorinated biphenyls; GC-MS; Juice
Categories
Funding
- Ministerio de Economia y Competitividad (Spain) [CTQ2016-78793-P]
- Junta de Comunidades de Castilla-La Mancha (Spain) [PEIC-2014-001-P]
Ask authors/readers for more resources
Magnetic cellulose nanoparticles (MCNPs) were used for the first time as sorbents for stir bar-sorptive dispersive microextraction (SBSDME). The main experimental parameters involved in the SBSDME process that affect extraction (i.e. amount of MCNPs, ionic strength, pH, extraction and back-extraction time) were investigated. The method was applied to the determination of nine polychlorinated biphenyls (PCBs) in fruit juice samples by gas chromatography-mass spectrometry (GC-MS). Under the optimized conditions, a good linearity was obtained in a concentration range of 10-1000 ng mL(-1) with determination coefficients over 0.9945. Limits of detection and quantification for all target PCBs were in the range 2.1-54 ng L (-1) and 7.0-180 ng L-1, respectively. Infra-day precision ranged from 1.7% to 8.8% and inter-day precision from 3.4% to 9.3% RSD. The enrichment factors of the analytes were from 74.6 to 98.2. The MCNPs can be reused up to 5 times. The method was applied to commercial orange and pineapple juices (n = 5), where concentrations were below the limits of detection. Recoveries from 70.4 to 108.0% were obtained by applying the method for the analysis of spiked fruit juice samples at 1 and 2 ng mL(-1) concentration levels. The use of cellulose makes this approach environmentally friendly and the magnetism of the resulting sorbent in conjunction with SBSDME provides ease of handling and saving of time.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available