6. the chemical in sample or some parameter that effect in an analytical procedure
7. the overall description of the instruction for a particular analysis
8. a material, substance or product containing an interested substance or chemical which analytical information is required
9. a chemical used to produce a specified reaction in relation to analytical procedure
10. a) a pure substance which reacts in a quantitative and know stoichiometric manner in analytical process
b) the pure substance containing a known amount of it which is used to calibrate an instrument or to standardization a reagent solution