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Well‐known as a hazardous compound, nitrite constitute a real threat to the public health. So, there is a pressing need to detect and quantify them in different matrix. Even though conventional analytical methods can be used to address this issue, electrochemistry allows a fast, sensitive, and efficient analysis. Conducting polymers continue to raise great interest among scientific communities due to their properties. Moreover, their combination with carbon nanomaterials, or metallic nanoparticles improves their properties, and provides great results. In this paper, we will focus on some revealing works devoted to the electrochemical detection of nitrite using this kind of materials. [ABSTRACT FROM AUTHOR]

A simple and greener electrochemical sensing platform towards nitrite measurement using amine modified Zr‐terephthalate and MWCNTs has been demonstrated. The characterization of the composite material has been carried out using spectroscopic and voltammetric techniques. The composite material overcomes the inherent drawbacks of MOFs like lower conductivity and stability in aqueous medium. The MWCNTs/Zr−ATA composite modified electrode showed better electrocatalytic activity in nitrite quantification with good linearity in the concentration range 2–440 μM with detection limit 0.22 μM and sensitivity of 0.657 μA μM−1 cm−2. The fabricated electrode has been applied to quantify nitrite from root nodule samples. [ABSTRACT FROM AUTHOR]

Mesoporous carbon ceramic SiO2/50 wt % C ( SBET=170 m2 g−1), where C is graphite, were prepared by the sol-gel method. The materials were characterized using N2 sorption isotherms, scanning electron microscopy, and conductivity measurements. The matrix was used as support for the in situ immobilization of Mn(II) phthalocyanine (MnPc) on their surface. XPS was used to determine the Mn/Si atomic ratios of the MnPc-modified materials. Pressed disk electrodes were prepared with the MnPc-modified matrix, and tested as an electrochemical sensor for nitrite oxidation. The linear response range, sensitivity, detection limit and quantification limit were 0.79-15.74 µmol L−1, 17.31 µA L µmol−1, 0.02 µmol L−1 and 0.79 µmol L−1, respectively, obtained using cyclic voltammetry. The repeatability of the proposed sensor, evaluated in terms of relative standard deviation was 1.7 % for 10 measurements of a solution of 12.63 µmol L−1 nitrite. The sensor employed to determine nitrite in sausage meat, river and lake water samples showed to be a promising tool for this purpose. [ABSTRACT FROM AUTHOR]