Determination of non-stigma content -LRB- `` floral waste content '' -RRB- and other extraneous matter such as inorganic material -LRB- `` ash '' -RRB- are also key .

Other metrics include floral waste content -LRB- i.e. the saffron spice sample 's non-stigma floral content -RRB- and measurements of other extraneous matter such as inorganic material -LRB- `` ash '' -RRB- .
