---
title: "Correct sampling"
chunk: 1/1
source: "https://en.wikipedia.org/wiki/Correct_sampling"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T12:22:06.312596+00:00"
instance: "kb-cron"
---

During sampling of granular materials (whether airborne, suspended in liquid, aerosol, or aggregated), correct sampling is defined in Gy's sampling theory as a sampling scenario in which all particles in a population have the same probability of ending up in the sample.
The concentration of the property of interest in a sample can be a  biased estimate for the concentration of the property of interest in the population from which the sample is drawn. Although generally non-zero, for correct sampling this bias is thought to be negligible.


== See also ==
Particle filter
Particle in a box
Particulate matter sampler
Statistical sampling
Gy's sampling theory


== References ==