Ash content is determined by calcination and deionized water is not necessary.
To evaluate the insoluble content of a substance.
natural rubber is more elastic than synthetic rubber
Yes. Volcanoes erupting and the ash released from them is a natural occurrence.
Fixed Carbon by Difference = 100 - (Volatile Content + Ash Content + Moisture Content)
there is a big difference in raw rubber and rubber reclaim. the properties of raw rubber and rubber reclaim is having far much differences just like elasticity ,ash content ,sulphur & carbon content . rubber reclaim product can be used in a little quantity as like filler in the rubber products. rubber reclaim is a recycled product bu raw rubber is a natural product.
Toluene + Natural Rubber + PF Resign
Ash wood is natural and comes from the Ash Tree (Fraxinus).
Ash content is determined by calcination and deionized water is not necessary.
Mixing natural rubber with nitrile rubber is possible. In fact, it is quite common to mix natural rubber with other kinds of rubbers.
To evaluate the insoluble content of a substance.
natural rubber is more elastic than synthetic rubber
The amount of ash produced during combustion relative to the amount of fuel fed into the wood pellet stove. Ash content is one indicator of quality for wood pellet fuel. Ash content for wood pellets should be between one and three percent. 

Yes. Volcanoes erupting and the ash released from them is a natural occurrence.
Natural rubber is created from the sap of the Rubber Tree. In fact, that is the only thing needed from the tree to produce natural rubber.
Natural rubber
There is no such thing as a natural rubber, rubber is man made.