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Open AccessA method for the determination of ZnDDP in lubricant oils by applying solid-phase extraction with mixed resin
One of the major applications of zinc dialkyldithiophosphates (ZnDDPs) is their usage as an anti-wear additive in lubricants including greases, hydraulic oils, and motor oils. ZnDDPs also could be used as corr...
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Article
Simultaneous Determination of Sildenafil, Tadalafil, and Vardenafil in Pharmaceutical Preparations by High-Temperature Gas Chromatography/Mass Spectrometry
Sildenafil (SD), tadalafil (TD), and vardenafil (VD) are drugs used to treat erectile dysfunction (ED). Pharmaceutical counterfeiting-related SD, TD, and VD compounds are becoming a critical problem due to the...
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Article
Thermal Degradation and Kinetics of Alginate Polyurethane Hybrid Material Prepared from Alginic Acid as a Polyol
Alginate polyurethane hybrid materials are prepared by varying mole ratio of 2, 4-TDI as a di-isocyanate and alginic acid as a polyol in presence of dimethyl sulfoxide (DMSO) as a solvent. FT-IR and 13C one-dimen...
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Article
Effect of Solvent Composition on Porosity, Surface Morphology and Thermal Behavior of Metal Alginate Prepared from Algae (Undaria pinnatifida)
Alginates, extracted from algae are linear unbranched polymers containing β-(1→4)-linked d-mannuronic acid (M) and α-(1→4)-linked l-guluronic acid (G) residues. The conversion of alginic acid into the metal algin...
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Article
Preparation of Alginic Acid and Metal Alginate from Algae and their Comparative Study
Alginic acid and metal alginates are prepared from fresh algae using extraction method. A FTIR spectrum indicates that alginic acid is converted into the metal alginate. Comparing calcium and cobalt alginates,...
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Article
Photoinduced synthesis of CdTe nanoparticles using Te-modified gold electrode in poly(vinyl pyrrolidone)-containing electrolyte
Photocathodic strip** of a pre-deposited tellurium film on a gold electrode in 0.1 M Na2SO4 electrolyte containing Cd2+ ions and poly(vinyl pyrrolidone) (PVP) was used as a route to the photoelectrosynthesis of...
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Article
Simultaneous determination of cannabidiol, cannabinol, and \gD9-tetrahydrocannabinol in human hair by gas chromatography-mass spectrometryin human hair by gas chromatography-mass spectrometry
An analytical method was developed for evaluating the cannabidiol (CBD), cannabinol, (CBN), and \gD9-tetrahydrocannabinol (\gD9-THC) level in human hair using gas chromatography-mass spectrometry (GC-MS). hair sa...
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Article
Determination of Dextromethorphan and its Metabolite Dextrorphan in Human Hair by Gas Chromatography–Mass Spectrometry
An analytical method has been developed for determination of dextromethorphan (DMP) and dextrorphan (DRP) in human hair by gas chromatography–mass spectrometry (GC–MS). Hair samples (30 mg) were washed with di...
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Article
Simultaneous Determination of Nalbuphine and Opiates in Human Hair by Gas Chromatography-Mass Spectrometry
The method for simultaneous determination of nalbuphine and opiates (codeine, morphine, and 6-monoacetylmorphine) in human hair was developed in the selected-ion monitoring (SIM) mode of a gas chromatography-m...
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Article
Potentiometric pH Response of Polymer Membranes Incorporated with Ion-exchangers
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Article
Evaluation of Chitin and Chitosan as a Sorbent for the Preconcentration of Phenol and Chlorophenols in Water
The evaluation of the applicability of chitin and chitosan as a sorbent material to solid phase extraction of phenol and chlorophenols was made by using high-performance liquid chromatography (HPLC). For the m...
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Article
Potassium-Selective PVC Membrane Electrodes Based on Newly Synthesized cis- and trans-Bis(crown ether)s
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Article
Comparative Studies on Various Room-Temperature Vulcanizing-Type Silicone Rubbers as Ion-Selective Electrode Matrices
In order to investigate the performance of different types of silicone rubber (SR) materials as matrices for ion-selective membrane electrodes, various cation-selective membranes are formulated from each of fo...
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Article
On-Line Preconcentration with Solid-Phase Extraction for the Determination of Phenol and Chlorophenols in Aqueous Samples by High-Performance Liquid Chromatography
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Article
Time-Resolved Resonance Raman Spectroscopy Using a Fast Mixing Device
A new fast mixing device has been developed. Our attention has been paid to improving the apparatus design in order to decrease the mixing dead time and to enhance the mixing efficiency. We modified and, mainl...