“…Thus, the detection and determination of nitrate concentration in different environmental matrices such as water and wastewater, soils sediments and plants are of primary importance. During past and recent years, a number of different methods such as spectrophotometry (Edwards et al 2001;López Pasquali et al 2007;Pasquali et al 2010), gas chromatography coupled with mass spectrometry (Tsikas et al 1997), ion chromatography coupled with electrospray ionization tandem mass spectrometry (Blount and Valentin-Blasini 2006), disk electrode alert system (Soropogui et al 2006), miniaturised photometry (Tu et al 2010), surfaceenhanced Raman spectroscopy (Gajaraj et al 2013), electrochemical (Beer and Sweerts 1989), membrane technology (Rezakazemi et al 2017(Rezakazemi et al , 2018a, electrophoresis (Gao et al 2004), hydrodynamic sequential injection (Somnam et al 2008), fluorescence (Mohr et al 1997;Huber et al 2001), and microplate fluorimetry (Ciulu et al 2018) have been used for the detection of nitrate in different types of samples. However, most of these techniques require expensive instrumentation, and in several circumstances, they are not suitable for instant field tests.…”