If you have 30 peaks in each chromatogram, then 1,000 points doesn't give you a lot of working room. Of course, Excel accommodates up to 65k rows, so at 10 Hz, you have enough room for 100+ minutes' worth of chromatography.
It's quite possible to program a "peak picker" in Excel, but you will have to teach yourself a lot about Excel in the process (you are essentially "reinventing the wheel") and the resulting processing *will* be very slow because of the huge overhead involved with such a general-purpose program. I suppose a lot depends on whether you have more time or money!
As to specifics:
Depending on how fast you were acquiring data, you might want to smooth the signal a bit by calculating a running average over some number of data points (you would have to play with your data to find out what works best). A simple "peak picker" would be to look for the first derivative (essentially the difference between successive measurements) to drop down below zero. You could then in essence query the data for those transition points.
It's not going to be as good as a purpose-made data system, but . . .