Current Analytical Chemistry - Volume 6, Issue 4, 2010

Thermal oxidative degradation of fresh and aged cellulose samples of wood or paper were studied using thermogravimetry (TG), first-order derivative thermogravimetry (DTG) and differential scanning calorimetry (DSC) under a forced air flow up to 800°C. TG and DTG data were processed according to three non isothermal kinetic methods - the Arrhenius differential, Satava's integral and lastly Wyden-Widmann's Read More

A stability-indicating liquid chromatographic (LC) method was developed and validated for quantitative determination of gemifloxacin mesylate (GFM) in coated tablets. The procedure was validated by specificity, linearity, accuracy, precision and robustness. Experimental design was used during validation to determinate method robustness and system suitability limits. The chromatographic method employed the Agilent Ec Read More

Bread is consumed worldwide by man, thus contributing to the regular ingestion of certain inorganic species such as chloride. It controls the blood pressure if associated to a sodium intake and may increase the incidence of stomach ulcer. Its routine control should thus be established by means of quick and low cost procedures. This work reports a double- channel flow injection analysis (FIA) system with a new chloride sensor for Read More

This paper reports the sequential voltammetric determination of Hg(II) and Cu(II) at the gold electrode (GE), and of Cu(II), Pb(II), Cd(II), Zn(II) at the hanging mercury drop electrode (HMDE) by differential pulse anodic stripping voltammetry (DPASV). Determination was performed in algae, potential environmental bio-monitor matrices, using 0.1 M HClO4 as supporting electrolyte. The sample digestion was also performed us Read More

Ceftazidime (CFT) is a third-generation cephalosporin antibiotic. Like other third-generation cephalosporins, it has broad spectrum activity against Gram-positive and Gram-negative bacteria. In this study, the copper(II) complex of CFT has been synthesized. This prepeared complex was characterized by physicochemical and spectroscopic methods. Its UV-Vis, IR and mass spectra suggest that CFT potentially acts as a bi-d Read More

A new, rapid and simple procedure based on dispersive liquid-liquid microextraction (DLLME) of the Cr(VI) chelate with ammonium pyrrolidine dithiocarbamate (APDC) and subsequent ICP-MS analysis of the extracts by using dried-droplet laser ablation (LA) sample introduction was developed for the determination of ultratrace amounts of Cr(VI). DLLME was performed using 1 mL of methanol containing 50 μL of CCl Read More

Cefaclor (CEF), a second generation cephalosporin antibiotic, possesses various donor sites for interaction with transition metal (II) ions such as Cu(II), Co(II) and Ni(II) to form complexes of the type [M(CEF)(H2O)Cl], with a molar ratio of metal:ligand (M:L) of 1:1. These complexes were prepared and characterized by physicochemical and spectroscopic methods. Their UV-Vis, IR and mass spectra suggest that CEF potenti Read More

A sensitive and simple Gas Chromatographic-Mass Spectrometric method was developed and validated for the determination of captopril in human plasma. Thiosalicylic acid was used as an internal standard, and plasma extraction was performed by solid phase extraction. The limit of quantification was 0.5 ng/mL with signal to noise ratio greater than 5. The calibration curve was linear from 1 to 160 ng/mL with r2 great Read More

In the present study, we reported the syntheses and investigation of the modes of binding to DNA and serum albumins of the two ethidium derivatives containing ethyl and methyl chloroformate of both amines at 3-and 8- positions. The interactions of calf thymus DNA (ct-DNA) and serum albumins (BSA and HSA) with the two derivatives, E4 and E5, were investigated using fluorescence quenching method and UV-visi Read More