You may be thinking of the various vitamins.
buffer
Mostly graphite with small amounts of other ingredients such as clay and wax.
put the solid substance into a test tube and then heat it on a wiregauze , alittle bit far from it...thx...with best regards.. crucible and lid is used for heating small amounts of solids
Trace
well steel is made out of iron Fe. Steel is not pure iron. It contains carbon and depending on the application it is required for, other metals in small amounts
vitamins are required in small amounts by the body.
vitamins/fruits and vegetables
Organic nutrients required in small amounts to maintain growth and normal metabolism are called vitamins. Raw materials that the body can use to assemble some vitamins are provitamins.
yes it is required in small amounts. The lesser the catalyst, the better is its efficiency.
diffusion
due to small amounts of organic matter
no
A vitamin
Biomarkers
Biomarkers
coenzyme
Trace element such as vitamins and/or minerals.