Abstract Phosphate removal efficiencies of 13 natural pumice rock samples obtained from different regions Turkey were investigated. Samples with high CaO content had phosphate adsorption capacity. It is concluded that an effective adsorbent for if its high. The capacity a powder sample was calculated the area under curve plot concentration vs volume effluent as 0.95 mg PO4− 3 g−1 powder. Variation pH, conductivity(S) and redox potential (mV) also measured during column experiment. Langmuir...

Abstract The adsorption of phosphate onto pumice powder was studied as a function time, pH and total dissolved concentration. Phosphate removal efficiency found to be more than 80%. reaction considered reversible at which forward first order is opposed by second reaction. rate constant k calculated 28.31 ± 2.37×10‐3. data had good fit Freundlich isotherm 3, 5, 7 9. In the presence NaCl, Na2SO4, MgClg, CaCl2, NaF urea, slightly affected.

Abstract The voltammetric behaviour of ticlopidine‐HCl was studied using square‐wave, sampled direct current and cyclic voltammetry. drug showed a cathodic peak at −0.01V versus Ag/AgCl with hanging mercury drop electrode. investigated voltammetry characterized as diffusion controlled. calibration plot linear over the concentration range 1.96×10−6−1.13×10−4 M in 0.5 phosphate buffer pH 5.0. Limit detection limit quantification were achieved 5.17×10−7, 1.72×10−6 M, respectively. Precision...

Chromium speciation in the presence of organic chromium(III) complexes was investigated using solid-phase extraction. The adsorptions Cr(VI) and Cr(III) on alumina pumice powder were studied. Maximum sorption obtained by (90.22%), while highly adsorbed onto (86.65%). This result shows that may be a new promising adsorbent for Cr(III). experimental equilibrium data adsorption analysed Langmuir Freundlich isotherms. separation Cr(VI), five at different pH values evaluated....

Süksinilaseton (SA, 4,6 diketoheptanoik asit), kalıtsal hepatorenal tirozinemi tip I hastalığı için birincil tanı metabolitidir. Bu çalışma ile süksinilasetonun amniyon sıvısında voltametrik tayinini amaçlanmıştır. Voltametri optimum koşullar belirlenmiştir. Destek elektrolit 0,10 mol/L potasyum klorür kullanılmıştır. Çalışmada, asılı civa damlası (HMDE) elektrotu olarak seçilirken, referans elektrot Ag/AgCl (3M KCI), karşıt Pt Kalibrasyon kare dalga voltametri kullanılmış, bu yöntem...

Abstract The effect of metal ions on TiO2 mediated photocatalytic oxidation for the determination dissolved organic nitrogen compounds is investigated. Ethylenediaminetetraaceticacid was chosen as a model molecule DON compounds. At pH 2, 5, 7, and 10 aqueous EDTA solutions were irradiated at 254 nm in presence Fe2+, Cu2+, Zn2+, Ni2+ or Co2+ ions. sum produced nitrate, nitrite, ammonium ion concentrations gave total recovery. low pH, recoveries Fe‐EDTA, Ni‐EDTA, Co‐EDTA significantly lower...

The oxidation of the neurotoxic amino acid, β-N-oxalyl-L-α, β-diaminopropionic acid was characterized by cyclic and square-wave voltammetries on a glassy carbon electrode. An electrochemical protocol developed validated for determination β-N-oxalyl-L-α,β-diaminopropionic in grass pea seeds. Solid-phase extraction used to separate homoarginine while simultaneously eluting presenting similar behavior acid. analyte, exhibited prewave quasireversible anodic peak at 147 mV (prewave) 200...