Chromium(III) selective membrane sensors based on Schiff bases as chelating ionophores

Highly Selective Detection of Titanium (III) in Industrial Waste Water Samples Using Meso-octamethylcalix[4]pyrrole-Doped PVC Membrane Ion-Selective Electrode

“…3, the fabricated membrane without OMCP reveals a physically tight structure (A), while the membrane with ionophore exhibited a physically permeable and loose structure that includes channels through which Ti(OH) 2+ species can diffuse (B) [15,16,28,29]. Furthermore, the physical appearance of the membrane shows swollen structure due to daily use over three months and stored in 1.0 Â 10 À3 M of It is known that the ionic species which cause significantly change in spectrum result in higher potential responses and therefore have a better selectivity [30]. The absorption spectra as exhibited in Fig.…”

“…Due to the difference in the thickness and morphology of the membranes at different locations, which result in fluctuation in extraction equilibrium of corresponding ions at the vicinity of the interface between the membrane and aqueous layer, the difference of Nernstian slope from one electrode to another could be vindicated. Consequently, the variation of the thickness can cause minor changes in Nernstian slope of the electrodes [30]. Rresponse time studies were carried out for several times by immediate and successive changing of target ion over the membrane without ionophore that conditioned for one day, (B) membrane with ionophore that conditioned for one day and (C) membrane that conditioned for three months and used daily over the mentioned period.…”

Removal of Turbidity, Suspended Solids and Ions of Fe from Aqueous Solution using Okra Powder by Coagulation-Flocculation Process

“…Biomass products have been used in water treatment and wastewater due to their biodegradability. With regard to the adsorption, various types of biomass such as chitosan, charcoal, sugarcane bagasse, dead fungal biomass, green algae and cyanobacteria were used for chromium removal [7][8][9][10][11][12][13][14][15].…”

Aluminum(III)‐selective PVC Membrane Electrode Based on Salicylaldehyde Salicyloyl Hydrazone

“…[12][13][14][15][16][17] However, there have been only a few aluminum(III) selective sensors reported. [18][19][20][21][22][23] The Schiff bases are known to be able to form stable complexes with metals and act as ion carriers in the poly(vinyl chloride) (PVC) membrane.…”

“…[18][19][20][21][22][23] The Schiff bases are known to be able to form stable complexes with metals and act as ion carriers in the poly(vinyl chloride) (PVC) membrane. [24][25][26] In this work, we investigated a highly selective PVC membrane electrode for Al 3+ based on a Schiff base of salicylaldehyde salicyloyl hydrazone (SSH). The sensor displays a Nernstian response for Al 3+ over a wide linear range with a low detection limit.…”