A reversed-phase HPLC method was developed and validated for the determination of caffeine and potassium sorbate in a neonatal oral solution. Chromatography was performed with a 100 × 4.5 mm Spherisorb 5 μm hexyl column with a mobile phase of 12% acetonitrile in 0.1 M sodium acetate buffer pH ...

Silica chemically modified with ionic liquid 1-propyl-3-methylimidazolium chloride has been examined as the material for the removal of anionic dyes Eosin Yellow (EY) and Reactive Blue 4 (RB4) from solutions. The material has the specific surface area 220 m2/g and average pore diameter 12.4 nm. ...

Potassium sorbate (PS) may be incorporated in blended cigarette tobacco either as a mold growth inhibitor in processed tobacco sheet material, or as a preservative in flavor systems or paper adhesives. To evaluate the effect of PS addition, neat material pyrolysis studies, smoke chemistry and bi...

Modification of Indonesian kaolinite with 3-amino propyl trimethoxy silane (APTES) was investigated for use as an adsorbent for the removal of Pb(II) from aqueous solutions. This research aimed to evaluate the effect of the amount of APTES on the surface properties and adsorption capability. Cha...

This work is concerned with the separation of propyl propionate/water mixtures by pervaporation using PEBA membranes, which is relevant to aroma compound recovery from dilute aqueous solutions. The solubility and diffusivity pertinent to the permselectivity were investigated. The effects of feed...

The effect of several additives on sorbate stability was studied in aqueous model systems of 0.91 water activity at pH 5.0. The rate constants of sorbic acid destruction could be described by first order kinetics. Non-enzymatic browning reactions exhibited zero order kinetics and were greatly in...

Propolis extract was investigated as potential substitute for sorbate in orangeade. Extract was prepared by using aqueous solution of hydroxypropyl-beta-cyclodextrins. Propolis extract was incorporated in non-carbonated orange soft drinks and its antioxidant activity, microbiological stability a...

The interaction of lanthanide acetates with triethanolamine in pyridine medium yields mononuclear cationic complexes [Ln(teaH3)2(MeCOO)](MeCOO)2·0.5Py (teaH3 = N(CH2CH2OH)3, Py – pyridine) in cases Ln = Ce (1) and Pr (2), and binuclear heteroleptic complexes containing deprotonated triethanola...

The industrial revolution in textile and dying process is moving with huge steps, but the treatment of produced wastewater from this industry is a huge dilemma. This work demonstrates the preparation and utilization of cellulose acetate (CA) blended with Fe3O4 already chemically modified with O-...

Moving bed biofilm reactors (MBBR) are promising as a post-treatment for removing pharmaceuticals from wastewater. However, the effect of easily degradable carbon sources on the degradation of pharmaceuticals is unclear. This study shows the influence of acetate on the degradation of 26 pharmace...

The iodine centered OH-adduct formed on reaction of ⋅OH radicals with 1-chloro-4-iodobutane in neutral aqueous solution transforms (k=5.4×105 s−1) to an intra-molecular radical cation (Download full-size image). The unfavorable structural conformation of solute radical cation generated on react...

In reactions of propargylic alcohols, RH(HO)CCCH (prop-2-yn-1-ol, meso-but-3-yn-2-ol), with secondary cyclic amines (piperidine, pyrrolidine, morpholine, 1-methylpiperazine, 4-methylpiperidine and meso-3,5-dimethylpiperidine), catalysed by cis-[W(CO)4(pip)2], previously unknown diamines containi...

Amphiphilic poly(N,N-dimethylamino-2-ethyl methacrylate)-g-poly(ε-caprolactone) graft copolymers (PDMAEMA-g-PCL) with various compositions and molecular weights were synthesised via a fully controlled three-step strategy. First, poly(ε-caprolactone) macromonomers (PCLMA) were prepared by ring-...

The photo-physical properties of five new para-phenyl substituted derivatives of 3-(7-dimethylamino)coumarin N-phenylsemicarbazone with various electron-withdrawing substituents R (RF, Br, CF3, CN or NO2) in the para-position on the phenyl ring were investigated in solvents and in polymer matric...

While lead-based perovskite solar cells have advanced recently, the toxicity of lead brings its large-scale applications into question. Therefore, the discovery of lead-free light absorbers becomes of paramount importance. Tin has attracted intensive interest since it is another IVA element, whi...

Two commercially available nanofiltration membranes (NF99HF, NP010) were investigated in order to separate In and Ge from pregnant leaching solutions (PLS) resulting from a bioleaching process. The PLS contains Zn, Cu and Fe as major components while In and Ge are minor constituents. In and Ge a...

A high-performance graphene oxide/Nafion/indium oxide (GO/Nafion/In2O3) humidity sensor is demonstrated in this paper. The morphology and nanostructure of nanocomposites were characterized by SEM, TEM, XRD, BET and XPS measurements. The humidity measurement platform was established by using satu...

The first indium sulfate coordination complex, (2,2′-bipy)[In2(OH)2(H2O)](SO4)2 (2,2′-bipy=2,2′-bipyridyl) was hydrothermally synthesized and characterized by single-crystal X-ray diffraction (XRD), the powder XRD, elemental analysis, inductively coupled plasma (ICP) analysis, thermogravimetr...

A new type of fluoride complex of indium(III) [N(CH3)4]6[In(H2O)6][InF6]3·18H2O (1) containing In(III) atoms in the hexafluoride complex anion and the hexaaquacomplex cation has been synthesized and structurally studied. The structure of [N(CH3)4]6[In(H2O)6][InF6]3·18H2O is formed by isolated ...

Selective recovery of valuable metals from secondary (waste) sources is essential for better resource efficiency. However, low-grade waste streams typically have complex and variable compositions and low concentrations of valuable metals. Therefore, development of novel technologies, able to dea...