A mercury trap has to be added as a check valve, and the middle bulb is filled with an inert porous material, e . g . pumice, onto which one of the precursors is dropped.
2.
"It constitutes a clear case of toxic trade, " said Nityanand Jayaraman, an environmental activist in India, " where a country that knows the dangers of mercury and is taking action to get out of the mercury trap has no problems exporting the problem to India ."
मोबाइल