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

• Published in: Talanta (Oxford) Vol. 67; no. 5; pp. 897 - 902
• Main Authors: Paama, Lilli, Pitkänen, Ilkka, Valkonen, Jussi, Pärnoja, Eed, Kola, Harri, Perämäki, Paavo
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 31.10.2005; Oxford Elsevier
• Subjects: Analytical chemistry; Chemical and thermal methods; Chemistry; DTG analysis; Eu and Sm sulphates hydrates; Exact sciences and technology; FTIR spectroscopy; ICP-MS; Spectrometric and optical methods; DTG analysis; TG; ICP-MS; Eu and Sm sulphates hydrates; FTIR spectroscopy; Lanthanide; Fourier transform spectroscopy; Samarium III; Gas analysis; Dehydration; Inductive coupling plasma spectrometry; Europium III; Water content; Hydrates; Trace analysis; Coupled method; Thermogravimetry; Fourier analysis; Differential thermal analysis; Air; Infrared spectrometry; Trace element; Chemical decomposition; Thermal analysis; Mass spectrometry
• ISSN: 0039-9140; 1873-3573
• DOI: 10.1016/j.talanta.2005.04.021

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 °C in the dynamic air atmosphere by TG/DTA analyser. The infrared evolved gas analysis was obtained on the FTIR spectrometer. Eu 2(SO 4) 3· nH 2O ( n = 3.97) and Sm 2(SO 4) 3· nH 2O ( n = 8.11) were analysed, the dehydration and decomposition steps were investigated and the water content was calculated. The formation of different oxysulphates was studied. The trace rare earth elements in Eu and Sm sulphates were determined by ICP-MS. The concentration of trace Eu, Sm, La, Gd, Y and Ce ranged from 3.9 × 10 −6 to 1.5 × 10 −4% (m/m).