[zargon]

I wouldn’t call it trivial, no. Pre-boiling it only removes about 50% of the arsenic. If you start with US rice from arsenic-poisoned soils, after boiling the rice you can still have more arsenic in it than rice that had lower levels to start with (even when cooked traditionally).

[fpoling]

One needs both to soak rice for at least 8 hours and boil it in excessive water to remove arsenic.