Two simple and rapid spectrophotometric methods were developed for the determination of two binary mixtures: moxifloxacin hydrochloride (MFH) with ketorolac tromethamine (KTM) and ciprofloxacin hydrochloride (CFH) with dexamethasone sodium phosphate (DSP). The first method, zero-crossing derivative spectrophotometry, depends on measuring the second derivative peak and trough values at 304 nm an...

there are various methods for the analysis of potassium sorbate and sodium benzoate in food products, but a rapid and reliable method for identification of these preservatives in doogh (an iranian traditional dairy drink) is a procedure, in which high performance liquid chromatography (hplc) utilized and followed by uv diode array detection of the two preservatives. the aim of this case study w...

The present work aims to develop a spectrophotometric method for simultaneous estimation of melatonin and Vitamin C in combined dosage form. Absorbance of melatonin and Vitamin C were measured at the absorbance maximum (λ max) at 278 and 256 nm, respectively. The coefficient of correlation for melatonin at 278 nm and Vitamin C at 256 nm is 0.9986 and 0.9968, respectively. A linear relation betw...

iron is quantitatively retained on an adsorbent made by coprecipitation of 1,2-dihydroxybenzene-3,5-disulfonic acid (tiron) and tetradecyldimethylbenzylammonium choride (tdba) an microcrystalline naphthalene as a slurry or packed in a column, in the ph range 6.0-9.0 from a large volumes of aqueous solutions (up to 200 ml on microcrystalline naphthalene and up to 500 ml of aqueous solutions in t...

tropicamide is an antimuscarinic agent used as eye drops for refractive examinations. the aim of this study was to develop a simple and suitable analytical method for determination of tropicamide in eye drops in the presence of excipients. a zero-crossing third and fourth derivative spectrophotometric method was described for determination of tropicamide in eye drops. the measurements were carr...

A prospective survey was conducted on 862 Enterobacteriaceae isolates with reduced susceptibility to carbapenems. The Carba NP test, UV spectrophotometry, and a DNA microarray were used to detect carbapenemase producers, and the results were compared to those from PCR and sequencing. The 172 carbapenemase producers were detected using the Carba NP test and UV spectrophotometry, whereas the DNA ...

The need for gas compound measurement concerns overall three domains: environmental monitoring, emission measurement and risk assessment. These fields are different because of concentration range (from 10–3 to thousands mg.m–3). A fast technique has been developed based on UV spectrophotometry. Simple robust optics and absence of interference from water vapour and carbon dioxide are two of the ...