Hi
is the value is big ? ( like -0.1 or less than it like -0.001)
I think it is from oxidatizer or feul pressuer ( I mean it is not
constant)
it must be constant

In analyticalchemistry@yahoogroups.com, "edimuntean" <edimuntean@...>
wrote:
>
> I need some advice in managing an AAS instrument which, after the
> Autozero procedure, gives negative values for both blanc and also
some
> samples. The calibration procedure is OK and the R values are
>0.99 ...
> 1. Can anybody explain this and tell me what to do?
>