  A laboratory measurement of the $\alpha$-decay half-life of $^{190}$Pt has
been performed using a low background Frisch grid ionisation chamber. A total
amount of 216.60(17) mg of natural platinum has been measured for 75.9 days.
The resulting half-life is $(4.97\pm0.16)\times 10^{11}$ years, with a total
uncertainty of 3.2%. This number is in good agreement with the half-life
obtained using the geological comparison method.
