Potentiometric Membrane Sensors for Levamisole Determination

Abstract

<jats:p>The ion pair (IP) of levamisole with BiI4 - (SbI4 - ) for the levamisole-selective sensor with a PVC membrane containing - ions were developed. Thermal behavior of obtained IP was investigated by differential thermal analysis that would show the thermal stability and the character of the decomposition of the complex. The thermolysis of Lev+BiI4 - IP undergoes three stages that fit a theoretical interpretation. The linearity ranges of levamisole sensors function are 7.9 ×10-6 – 1×10-1 (7.9 ×10-5 – 1×10-1 ) M. The Nernstian slope of 50.6 – 53.4 mV pC−1 and detection limit of 5.0 × 10−5 – 1.5 × 10−4) M. The working range of pH is 2.8 – 6.0. The efficiency of the use of electrodes for levamisole content control in pharmaceutical preparations was shown by direct potentiometry and potentiometric titration methods.</jats:p>

Biologically active properties of plant extracts in cosmetic emulsions

“…The antioxidant activity of the extracts and samples of the cosmetic emulsion with the addition of extracts was determined by the Oyaizu method (FRAP method) [18] and by the ability of antioxidants to Organoleptic (appearance, color, odor), physical and chemical properties (colloidal and thermal stability, pH) samples of cosmetic emulsion were determined according to literature [19][20][21] .…”

Facile utility of felumin, a biological dye for the first fluorimetric determination of l-tetramisole drug through an “on–off fluorescence” strategy

“…HPLC was used to quantify LTS alone 22,23 and in the presence of other drugs such as albendazole, 24 heparin and pentobarbital, 25 abamectin, 26 and thiabendazole. 27 Also, an electrophoretic technique 28,29 and electroanalytical approaches [30][31][32] have been applied for its determination. Spectroscopic techniques [33][34][35] (including extractive spectrophotometric, 34 and ultraviolet methods 36 ), luminescence, 37 and the atomic absorption spectrometric method 38 have also been used.…”