most of the "secret" chromium for H-isotope analysis has been explained by
Rolf Siegwolf. We use Cr for H-isotope analysis for many of years
successfuly and I must say Cr is particularly well suitable for H- isotope
analyses of water.
1. You can use Cr for all waters: clean, mineralized and saline waters,
organic waters like blood serum, without any purification of the sample.
2. For routine analyses we use about 4 micro-L of sample.
3. The precision is about 0.5 o/oo.
4. We use Cr from MERCK: Chromium Powder Patinal, grain size less than
0.3mm, No: 1.12997.1000 (Fa. MERCK, D-64271 Darmstadt, Germany, Tel.
There is no purification necessary.
We can send you copies of:
Gehre, M., Hoefling, R., Kowski, P.:Methodical studies for D/H analysis - a
new technique for the direct coupling of sample preparation to an IRMS.
Isot. Environm. Health Stud. 32 (1996) 335-340.
Runge A..: Fortschritte bei der Probenchemie des Wasserstoffs fuer die
Praezisionsisotopenanalyse an organischen Verbindungen und mineralisierten
Waessern. Isotopenpraxis 2 (1980) 67-68
Please, contact us for more details.
With best regards
>I am wondering if anybody can tell something about experience with Cr
>metal reduction for H-isotope analysis.
>A device for water analysis, injected by a syringe in the reduction
>system and based on this Cr reduction is available from Finigan. I can
>immagine larger water samples are not giving problems, but what about
Centre for Environmental Research Leipzig-Halle Ltd
Department of Hydrogeology
Tel: ++49/345/5585 206 Fax: ++49/345/5585 559
e-mail: [log in to unmask]