Thanks for contacting us. The process of quantifying beta-carotene in carrots will involve a two step process: 1) Extraction of beta-carotene in carrots and 2) measuring the the absorbance of the beta-carotene using a spectrometer. This process will require the use of a non-polar solvent such as ethanol. Is this what you had in mind, if so, I can e-mail you the specifics.
Thank you! Carol