Re: [ISOGEOCHEM] Carbonate roasting temperatures and other pretreatments
Dear
all
I have
made a lot isotope analyses on gray and black limestones from differnt
localities of the Precordillera, Argentina. First without roasting and
then roasted. I do not know if in any case obtained the actual
values. The only thing I know is that after roasting I coud get 3
replicates of each sample within 0.1 %o and witn no roasting
differences of 1 %o or more. If you plot the traces of
ratios measured in the MS they are not parallel, but they increase or
decrease linearly during the measurement. I used to roast the samples at
300 ºC under vacuum.
regards,
Héctor O. Panarello
Director
INSTITUTO DE GEOCRONOLOGÍA Y
GEOLOGÍA ISOTÓPICA (INGEIS)
Pabellón INGEIS - Ciudad Universitaria
1428
Ciudad de Buenos Aires
Tel: +54-11-4784 7798
Fax
+54-11-47833024