Ravi,
freezing at -17°C after prefiltration 0.45 um has smallest effects. There is a
systematic work on filtation and storage of DOC done by
[log in to unmask]
gerd

Ravi Bhushan wrote:

> Dear Friends,
>
> I am planning to make DOC measurements in river water samples using
> Shimadzu TOC 5000A analyser. One of the basic problems we are facing is
> storage of samples. Can anybody suggest the standard protocol for storage
> of river water samples for DOC measurement.
>
> Thanks
>
> Ravi
>
> **************************************************************************
> * RAVI BHUSHAN                         ** Tel(O): 91-79-6302129 Ext:4047 *
> * OCEANOGRAPHY & CLIMATE STUDIES AREA  ** E-mail: [log in to unmask]   *
> * PHYSICAL RESEARCH LABORATORY         ** Fax : (91)-(0)79-6301502       *
> * NAVRANGPURA                          ** Telex : 0121-6397              *
> * AHMEDABAD-380 009                    ** Tel(R): 91-79-6766546          *
> * INDIA                                **                                *
> **************************************************************************