Dear All,
Please note that Dachung's second statement  must be come with the warning
to be careful when adding acid to an oil brine particularly if it been
under anaerobic conditions in the field or in a capped bottle. H2S could  be
generated from a variety of sources.
Roy Krouse
----- Original Message -----
From: "Dr. Dachun Zhang" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, November 20, 2001 3:19 PM
Subject: Re: DIC in groundwater


> Hi, Graeme:
>
> We use plastic bottle as sample container for C-13 and C-14 analysis of
dissolved
> CO2 in water for years without any problems.
>
> If you are talking about SO4, it is inert during acid treatment to release
CO2.
>
> Hope this helps.
>
> Dachun Zhang
>
> Graeme Lyon wrote:
>
> > Are plastic (PVC) bottles adequate for short term (days) storage of
groundwaters
> > before extraction of C for 13C and 14C analysis?
> >
> > What is the best way to treat for sulfur in the oilfield brines before
> > extracting the CO2 ?
> >
> > Graeme Lyon
> >
> > Dr G L Lyon,
> > Rafter Building,
> > Institute of Geological & Nuclear Sciences Ltd,
> > P O Box 31 312, [courier address: 30 Gracefield Road]
> > Lower Hutt,
> > New Zealand
> > Phone: 64 + 4 + 570 4637
> > Fax : 64 + 4 + 570 4657
> > Email: [log in to unmask]
> > Web : www.gns.cri.nz