Ash content mineral matter

The ashing of a yam or fabric can be used to determine inorganic residues like silicate, phosphate, calcium, copper and iron contents on the fabric. 

Approximately 5 g of dried samples are placed in a weighed crucible. The material is slowly ignited over a Bunsen flame and then the cmcible is placed in a 

Typical values for grey cotton are 0.5-1.0%, which drops to 0.2-0.5% after scouring and bleaching. 

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