Is there a commercial control (ie lyophilized) available for beta-carotene
(retinol and alpha-tocopherol would also be convenient but not
compulsory)? If not what does everyone who uses a HPLC method for the
determination of Vit A&E and beta-carotene use for a control material?
Include stability and storage conditions when replying.
Michael Freemantle
Sullivan Nicolaides Pathology
PO Box 344
Indooroopilly Q4068
Brisbane
Australia 4068
ph +61 (0)7 33778638
fax +61 (0)7 38405989
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