1,720,972 research outputs found
Synthesis of 4-hydrazine-1-oxo-phtalazinic derivatives with potential antiypertensive action [Sintesi di derivati 4-idrazino-1-oxo-ftalazinici a potenziale attività ipertensiva]
No full textApplication of near infrared reflectance spectroscopy of pharmaceutical quality control. II. Assay of cloxacillin benzatine in creams
No full textSpeciation of tetra-, tri-, dialkyllead compounds and inorganic lead at nanomolar levels (sub-ppb) in water samples by differential pulsed electrochemical techniques
No full textnon disponibil
Planar chromatographic and liquid chromatographic analysis of thiamphenicol in bovine and human plasma
No full textA planar chromatographic (PC) method was developed to determine thiamphenicol in human and bovine plasma with florphenicol as internal standard. The performance of the method was compared with that of a liquid chromatographic method. Recovery of extraction method developed for plasma was 81.51 ± 2.85%. Reproducibilities of the PC assay performed with various PC plates were also good
Application of Near Infrared Reflectance Spectroscopy to pharmaceutical control. I. Preliminary investigation of the uniformity of tablets content
No full textThis is preliminary study of systems in solution and forms part of an investigation of the application of NIR reflectance analysis to the uniformity of content of solid state systems. Qualitative-quantitative analysis of combined oestroprogestinic mixture gave satisfactory results in contraceptive tablets
Polarographic determination of pyrethroid residues in stored cereals
No full textA new method for determination of the total cyanopyrethroid residue concentration in stored cereals by differential-pulse polarography is proposed. Cyanopyrethroids were previously extracted with a non-polar solvent and purified by solid-phase extraction. The total pyrethroid residue concentrations are determined by differential-pulse polarography of 3-phenoxybenzaldehyde formed quantitatively by rapid and reproducible alkaline alcoholysis of the sample. The method is linear, quantitative and reproducible for maize and wheat analysis in the range 0.1-3.0 mg kg-1. A thin-layer chromatographic method for identification of six widely used cyanopyrethroids in the sample is described. The electronic reduction process of 3-phenoxybenzaldehyde is examined and the reduction products isolated and identified
Determination of diisocyanate monomers in air by differential-pulse polarography
No full textA method for the determination of hexane-1,6-diyl diisocyanate 1-isocyanato- 3-isocyanatomethyl-3,5,5-trimethylcyclohexane, toluene-2,4-diyl diisocyanate and toluene-2,6-diyl diisocyanate in air by differential-pulse polarography (DPP) is described. The monomers are derivatized with 4-nitro-N-propylbenzylamine (nitro reagent). The excess of nitro reagent is removed by using solid-phase extraction columns and the ureido derivatives are determined by DPP in 0.2 mol dm-3 KOH [methanol-water (80 + 20)] as the total concentration of diisocyanate in the sample
Thin layer chromatography in the quantitative analysis of drugs. Determination of rifaximine and its oxidation products
No full textSilica 60 HPTLC concentration zone plates were successfully used for the qualitative and quantitative determination of a semi-synthetic form of rifamycin, Rifaximine, alone and with its oxidation products in cream. The method also gave satisfactory detection limits (0.52-mu-g/ml) for antibiotic residues in milk after the cream had been used to treat mastitis in cows
Densitometric determination on thin layer chromatography of 6β-hydroxycortisol in biological fluids [Dosaggio densitometrico del 6beta-idrossi-cortisolo nelle urine]
No full textApplication of Reflectance NIRS Spectroscopy to pharmaceutical quality control solid binary mixtures
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