A solid based titrimetric method is introduced in which a solid titran
t is poured to a solution by a vibrating spatula fixed to the pan of a
balance. The spatula, the balance, and the responses of the detector
are measured and controlled by a personal computer. The precision and
reliability of the method are evaluated by a series of potentiometric
and photometric titrations. In potentiometric titrations 20 to 40 equi
librium pH data points near the equivalence point are collected within
an acceptable time. Titrations within the concentration range 10(-4)
to 0.1 mol kg(-1) are accomplished. Both potentiometric and photometri
c titrations exhibit a precision of about a few tenths of a per cent.