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Dear Dachun,

Hydrogen (dD) is always like this. Regards, River He

--- Dachun <[log in to unmask]> wrote: > Hi,
>
> I use IsoPrime to run dD of water by Cr reduction
> method. The raw values of the working standards
> sometimes fluctuate day by day. The values of  -360
> and -79 for the first day can be -354 and -65 the
> next day. There is no big change of the machine
> condition except a slight shift of peak center.
> However, the calculated dD values of the repeated
> samples are perfectly match from day to day. It
> seems not a real big problem. I will feel better if
> more people telling me they have the similar
> experiences.
>
> Cheers.
>
> Dachun Zhang
> Zymax

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