Determination Of Carbonate In Marine Solid Sample

View Online / Journal Homepage / Table of Contents for this issue

THE

ANALYST

COMMUNICATION

Determination of carbonate in marine solid samples by FTIR-ATR spectrometry
Mauro Mecozzi,* Eva Pietrantonio, Marina Amici and Giulia Romanelli Istituto Centrale per la Ricerca Scientifica e Tecnologica Applicata al Mare, via di Casalotti n. 300, 00166 Roma, Italy. E-mail: mecoma@rdn.it Received 9th November 2000, Accepted 10th January 2001 first published as an Advance Article on the net 18th January 2001
A regularity for detecting carbonate in marine solid samples (sediments, corals) by Fourier transform infrared spectroscopy (FTIR) coupled to the total attenuated reflectance (ATR) technique is described. Compared to other techniques, the proposed method is not based on the measurement of carbon dioxide evolved by combustion or acidification of the sample, but on the control measurement of carbonate present in the sample. For this reason, the method by FTIR-ATR spectroscopy does not require any chemical pre-treatment. The proposed method allows determination of carbonate in the range 6 hundred% (w/w) as Na2CO3 and gives comparable results with the determination of inorganic carbon by elemental abstract.

www.rsc.org/analyst

frozen (220 °C) until the analysis.



Coral samples (Cladocora caespitosa) were collected at Civitavecchia (Tyrrhenian Sea). 2.2 FTIR analysis FTIR analysis was performed on samples previously dried at 40 °C for 24 h at least and because pulverized in an agate mortar. FTIR spectra were obtained by a Jasco 410 spectrophotometer. For the ATR spectra a even ZnSe crystal accessory (Pike Technology model with a 45° incidence angle and 10 internal reflections) for solid samples was used. A reference spectrum of the ZnSe crystal was collected before the measurements were carried out. A deal out of the sample (1 ± 0.01 g) was placed on the ZnSe crystal and the optimal while away between sample and ATR crystal was obtained by impregnating the sample with acetone.7...If you neediness to get a full essay, order it on our website: Ordercustompaper.com



If you want to get a full essay, wisit our page: write my paper