At 10:46 AM 10/7/98 +0000, you wrote:
>Greetings List,
>
>I am currently studying D/H in atmospheric methane.  I require a supplier of
>a D/H isotopic reference gas with a value of circa -300 per mil (SMOW).
>Can anyone help?
>
>Many Thanks
>
>Nigel Rata
>---------------------------------------------------------------------------
>Nigel Rata, Geology Department,                 Tel:   +44 1784 443630
>Royal Holloway University of London,            Fax:   +44 1784 471780
>Eghan Hill, EGHAM, Surrey, TW20 0EX.            Mobile:+44 973  836662
>
>Alternative e-mail: [log in to unmask]
>            url:    http://www.unseen.org/~nigel
>
>Methane Website: http://www.gl.rhbnc.ac.uk/METH/methmain.html
>
>---------------------------------------------------------------------------
>Messer Griesheim, a German factory, is selling H2 gas in Al minibottles of
dD=-200 and -400 vs. SMOW. The fax of the italian branch is as follows:
0039 - 11 - 4118259.
Bruno Turi