Ash content is determined by calcination and deionized water is not necessary.
To evaluate the insoluble content of a substance.
There is natural rubber, made from the latex of the rubber tree (Hevea brasiliensis).There are several manmade rubber compounds, including butyl rubber, neoprene, and nitrile rubber.
Rubber is a natural material derived from the latex of certain plants, such as the rubber tree. However, synthetic rubber is also made in a chemical process using petroleum byproducts. So, rubber can be both man-made and natural.
No nitrile rubber is a synthetic rubber polymer
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.
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.
There is natural rubber, made from the latex of the rubber tree (Hevea brasiliensis).There are several manmade rubber compounds, including butyl rubber, neoprene, and nitrile 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. 

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.
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Yes, dry natural rubber contains latex, as latex is a component of natural rubber. Latex is a milky fluid present in the rubber tree's sap, and when it is dried and processed, it forms natural rubber.