Votre application – notre solution : en savoir plus sur les méthodes de préparation d'échantillons dans le secteur de la pharmacie. Prenez connaissance de nos rapports d'application avec des conseils pour le broyage ou consultez notre base de données sur les protocoles de broyage avec de très nombreux exemples et des indications précises. - Rapports et protocoles de broyage ici en anglais -
It is dissolved in certain acids and then analyzed via gas chromatography or the mass spectrometer. The dissolving in the acid is accelerated and improved through the enhancement of the specific surface area of the sample. Here the FRITSCH Ball Mill PULVERISETTE 23 is used.
In a 15 ml steel bowl, 300 - 500 mg hair is weighed in. As a grinding body a 15 mm steel ball is used. After a grinding duration of 5 minutes a fine powder is attained (< 100 µm), which can be used for the following analysis.
For larger amounts or for the grinding of two samples simultaneously, the FRITSCH Planetary Micro Mill PULVERISETTE 7 classic line can be used. In a 45 ml grinding bowl made of zirconium oxide, sintered corundum, silicon nitride approximately 0.1-1 g of hair is weighed in and 7 x 15 mm grinding balls are added. The grinding time is 5 - 20 minutes. Afterwards a fine powder is obtained (< 100 µm), which can be used for additional analysis.
Download the FRITSCH-report as PDF-file
Drug testing via hair analysis
Detailed grinding reports
Additional literature
