Dear Daniel,

Humbly trying to add a comment to the previous answers, in contrast to δ18O, your δ34S should not be critically affected by the presence of other salts in the sample (NO3, PO4 etc), during the precipitation of BaSO4. 


2016-05-12 14:05 GMT+02:00 Qi, Haiping <[log in to unmask]>:
Dear Daniel,

You may also get some idea from Janet Hannon and others'  paper

"Effects of nitrate and water on the oxygen isotopic
analysis of barium sulfate precipitated from
water samples",  published on RCM 2008, 22: 4109-4120



On Thu, May 12, 2016 at 6:53 AM, Daniel Carrizo <[log in to unmask]> wrote:

Dear ISOGEOCHEM colleagues,

I precipitate sulphate with BaCl2, for d34S measurments, I know that I have some other ionic species in the water sample, like phosphate, or nitrate, thus I have to expect interferences/problems in the BaSO4 IRMS analysis??

Many thanks for your help and thoughts!


Dr. Daniel Carrizo
Investigador Ramón y Cajal (RYC)
Centro de Astrobiología (INTA-CSIC)
Instituto Nacional de Técnica Aeroespacial
Ctra de Torrejón a Ajalvir, km 4
28850 Torrejón de Ardoz, Madrid, Spain.
Tel: (+34) 692521256
Email: [log in to unmask]


Haiping Qi

USGS/Reston Stable Isotope Laboratory
12201 Sunrise Valley Dr., MS 431
Reston, VA 20192


Dr. David Psomiadis
Laboratory Manager

Werner von Siemens Straße 1
A-7343 Neutal
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