@article{2928268,
    title = "3D-printed lab-in-a-syringe voltammetric cell based on a working electrode modified with a highly efficient Ca-MOF sorbent for the determination of Hg(II)",
    author = "Christos Kokkinos and Anastasios Economou and Anastasia Pournara and Manolis Manos and Ioannis Spanopoulos and Mercouri Kanatzidis and Thomais Tziotzi and Valeri Petkov and Antigoni Margariti and Panagiotis Oikonomopoulos and Giannis S. Papaefstathiou",
    journal = "Sensors and Actuators B: Chemical",
    year = "2020",
    volume = "321",
    number = "-",
    pages = "128508",
    publisher = "ELSEVIER BV",
    issn = "0925-4005",
    doi = "10.1016/j.snb.2020.128508",
    keywords = "Metal-organic frameworks, 3D-printed electrode, Electrochemical sensing, Sorption, Mercury",
    abstract = "This work combines, for the first time, 3D-printing technology and a
highly efficient metal organic framework (Ca-MOF) as an electrode
modifier to produce a novel fully integrated lab-in-a-syringe device for
the sensitive determination of Hg(II) by anodic stripping voltammetry.
The specific Ca-MOF ([Ca(H4L)(DMA)(2)]center dot 2DMA where H6L is the
N,N’-bis(2,4-dicarboxyphenyl)-oxalamide and DMA is the
N,N-dimethylacetamide) shows an exceptional Hg(II) sorption capability
over a wide pH range and its mechanism is elucidated via spectroscopic
and Xray diffraction studies. The voltammetric lab-in-a-syringe device
is fabricated through a single-step process using a dual extruder 3D
printer and is composed of a vessel integrating two thermoplastic
conductive electrodes (serving as the counter and pseudo-reference
electrodes) and of a small detachable 3D-printed syringe loaded with a
graphite paste/Ca-MOF mixture (which serves as the working electrode).
After optimization of the fabrication and operational variables, a limit
of detection of 0.6 mu g L-1 Hg(II) was achieved, which is comparable or
lower than that of existing sensors (plastic 3D-printed, gold and
MOF-based electrodes). The adoption of 3D printing technology in
combination with the highly efficient Ca-MOF enables the fabrication of
a simple, low-cost and sensitive electrochemical sensor for Hg(II),
which is suitable for on-site applications."
}