process in which a representative piece of material is extracted from a larger amount and readied for analysis, protsess, mille käigus esinduslik materjalitükk eraldatakse suuremast kogusest ja valmistatakse ette analüüsimiseks, preparation that refers to the ways in which a sample is treated prior to its analyses, because this preparation is a very important step in most analytical techniques, because the techniques are often not responsive to the analyte in its in-situ form, or the results are distorted by interfering species, isolating a representative piece of material from a larger source, proovi ettevalmistamine viis, mis olulise sammuna iseloomustab proovi töötlemist enne selle analüüsimist, kuna analüüsi meetodid ei reageeri sageli analüüdile selle ehtsal kujul või moonutavad tulemusi segavad koostisosad, proovi töötlemise viis, mis viitab toimingutele, kuidas proovi enne selle analüüsimist töödeldakse