Dear Isotopers,

My sincere thanks to all of you who answered to my "zero enrichment" problem; 
I hope I can sort it out now.

There may have been a transmission problem: the 45/44 value I quoted is 0.0xx 
o/oo, NOT 10! I used in my original message the (ALT-241) plus/minus sign, 
leading to an erraneous transmission in at least one case. Sorry for the 
inconvenience.

cheers, 

Uwe