Measuring static charge with an electrometer?

[SArepairman]

Can an electrometer be used to measure static charge (since it measures coulombs). Like in the EEVblog video where Dave Jones has some sort of meter that measures surface charge (it has a round plate iirc).

Is there some kind of attachment for common tri-axial connection electrometers?
Since the input impedance is gargantuan (10^14 ohms, or 100 teraohms), could I just use regular voltage measurement mode and then a high voltage divider probe (1000:1), designed so that meter can read 35kV apparently, and touch stuff with a little disk (so it has greater surface area) to get a good charge reading?