Capillary gas chromatographic analysis of pyrrolidinedithiocarbamate metal chelates

Abstract

Pyrrolidinedithiocarbamate (PDTC) chelates of Zn(II), Cu(II), Ni(II), Co(III), Fe(III), Mn(II), Cr(III), and VO(II) were analysed by capillary GC on a DB-1701 column (30 m x 0.25 mm id) with flame ionisation detection (FID). Linear calibrations were attained within "1-30 microg/mL" for Ni(II), Fe(III), Mn(II), Cr(III), Cu(II), and VO(II), and within "2-50 microg/mL" for Co(III) and Zn(II). The limits of detection were in the "150-500 ng/mL" range, corresponding to 15-50 pg amounts reaching the FID system. The optimised method was applied to the determination of Cu(II) and Ni(II) in coins, and that of Zn(II), Cu(II), Ni(II), Fe(III), Mn(II), Cr(III), and VO(II) in pharmaceutical preparations with relative standard deviations within 1.1-5.2%. The results obtained are in good agreement with sewage water samples and the declared values for the pharmaceutical formulations, or with the results of AAS of metal contents in coins, pharmaceutical preparations, and sewage water samples.

Aspirin in Food Samples for Separation and Micro Determination of Copper(II) Using Cloud Point Extraction/Solvation Method

“…Different techniques were examined for copper pre-concentration and separation in different environmental and organic matrices. Methods as solvent micro extraction [7,8], also used another ion [9], solid phase extraction (SPE) [10], inductively coupled plasma mass spectrometry [11], ion chromatography [12], flame and graphite furnace atomic absorbing spectrometry [13] and spectrophotometric methods [14][15] and cloud point extraction (CPE) [16], [17] were described for this purpose. Nevertheless, extraction methods such as LLME or SPE, have most amounts of biological solvent that are particularly toxic volatile, flammable and destructive to the surroundings [18], or large volumes of eluents to guarantee the whole backextraction of the interested analytes, correspondingly.…”

Determination of Chromium in Natural Water by Adsorptive Stripping Voltammetry UsingIn SituBismuth Film Electrode

“…ere are several sensitive methods for determining chromium such as atomic absorption spectrometry [5,6], plasma emission spectrometry [7,8], and capillary gas chromatography [9]. ese methods, while highly sensitive, only reach the ppb size detection limit and often require preenrichment and extraction stages, which can lead to sample contamination, complicate processes, and increase the cost of analysis, and therefore, it will be difficult to require frequent and mass analysis of samples in the environment.…”