in this work, zno/sio2 nanoparticles were prepared using sol-gel method, and platinum particles were loaded on zno/sio2 nanoparticles by photoreductive method. samples were characterized by x-ray diffraction (xrd), scanning electron microscopy (sem) and fourier transform infrared spectroscopy (ft-ir). the xrd patterns showed that the zinc oxide samples have a wurtzite structure (hexagonal phase...

resolution of binary mixtures of theophylline (theo), montelukast (mkst) and loratadine (lora) with minimum sample pretreatment and without analyte separation has been successfully achieved by multivariate spectrophotometric calibration, together with partial least-squares (pls-1), principal component regression (pcr) and hybrid linear analysis (hla). data of analysis were obtained from uv–vis ...

Caffeine intake by pregnant women, adults and children can be harmful to the health of all particularly fetuses if exceeds permissible limits. Therefore, it is fundamental importance measure its concentration accurately using certified reference materials (CRMs). In literature, no scientific details are published about certification caffeine standard solutions, therefore, present article covers...

Soybean contains nutritional bioactive compounds, including carotenoids associated with human health benefits. Carotenoids are applicable in pharmaceuticals/nutreceuticals, cosmetic, and mainly food industries. However, an efficient accurate method for carotenoid chlorophyll detection quantification has not yet been developed validated soybean seeds. The need a rapid reliable analysis become in...

Saffron is considered as the most expensive spice in world. Due to low production, high demand and cost, saffron very prone adulteration for economic benefits while putting public health at risk. The significant characteristic determining quality of coloring strength (crocin content), which determined by measuring UV-Vis absorption 440 nm aqueous preparations this spice. Picrocrocin safranal ar...

A novel and sensitive stability-indicating RP-HPLC method for the quantitative determination of cefquinome sulfate has been developed. Chromatographic separation and quantitative determination were performed using a high-performance liquid chromatograph with UV detection. As the stationary phase a LiChroCART RP-18 column (5 microm particle size, 125 mm x 4 mm, Merck, Darmstadt, Germany) was use...

Hydrochlorothiazide (HCT) is a thiazide diuretic which reduces the resorption of electrolytes and consequently of water. Enalapril maleate (EM) is a derivative of 2 amino acids, L-alanine and L-proline, and is an antihypertensive and a vasodilator in congestive heart failure. The 2 drugs are used in association in the treatment of hypertension . Several methods are available in the literature f...

The development of facile and rapid quantification of biologically active biomolecules such as isotretitoin in therapeutic drugs contained in many generic formulations is necessary for determining their efficiency and their quality to improve the human health care. Isotretritoin finds its applications in the maintenance of epithelial tissues. Different processes to date such as normal phase HPL...