A much discussed issue related to Near Infrared Analysis (NIR) is the necessity of sample preparation. Ground and unground samples of wheat were analyzed to determine how truly necessary it to homogenize samples before NIR analysis.

Milling and grinding are ancient techniques that are working their way into high-tech markets.

Mills and grinders are used to prepare samples (of minerals, plants, food, drugs, pigments, and forensic materials, for example) through particle size reduction (comminution).

Polynuclear aromatic hydrocarbons, also known as PAH, are used as plasticizers in many caoutchouc products, such as the rubber grips of tools. Some PAH have a proven carcinogenic effect on humans; this is why there are critical limits for the maximum

No shortage of methods; the choice depends on the sample.