D-(+)-Xylose,BioXtra, >=99% (GC)

L-Proline,ReagentPlus, >=99% (HPLC)

Pepsin from porcine gastric mucosa,powder, >=250 units/mg solid

Sorbic acid,99.0-101.0% anhydrous basis

Tricine,BioPerformance Certified, suitable for cell culture, >=99% (titration)

Wright stain,certified by the BSC

?L-Tyrosine,99%

Florisil,for the determination of hydrocarbon acc. to ISO 9377-2

Ethylenediaminetetraacetic acid dipotassium salt dihydrate,puriss. p.a., >=99.0% (KT)

1,3,5-Trichlorobenzene,certified reference material, TraceCERT, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland

Aluminum oxide,for the determination of hydrocarbons

Hydroxyethyl-cellulose,