Determination of trace impurities in germanium dioxide by ICP-OES, ICP-MS and ETAAS after matrix volatilization: a long-run performance of the method.

High-purity germanium compounds (e.g. germanium dioxide) are used these days in several applications (e.

Thermal and spectroscopic investigation of europium and samarium sulphates hydrates by TG-FTIR and ICP-MS techniques.

The investigation of europium(III) sulphate hydrate and samarium(III) sulphate hydrate was performed by thermal analysis (TG-DTG) and simultaneous infrared evolved gas analysis-Fourier transformed infrared (EGA-FTIR) spectroscopy. The TG, DTG and DTA curves were recorded at the 25-1400 degrees C in the dynamic air atmosphere by TG/DTA analyser. The infrared evolved gas analysis was obtained on the FTIR spectrometer.

Development of analytical methods for the determination of sub-ppm concentrations of palladium and iron in methotrexate.

Analytical methods for limit test (1 microgg(-1)) determination of iron and palladium in the drug substance methotrexate (MTX) were developed. The methods developed were based on microwave-assisted, vapor-phase digestion using quartz inserts inside the digestion vessels, followed by instrumental determination. Iron was determined by graphite furnace atomic absorption spectrometry (GFAAS) and palladium by direct current plasma optical emission spectrometry (DCP-OES).