3.5. b-Carotene content
The b-carotene content in sweet potato can vary depending
on cultivars, harvesting conditions, and maturity (Van Hal,
2000). b-Carotene contents of peeled and unpeeled sweet potato
flour obtained following pretreatment and at different drying
temperatures are shown in Table 4. The b-carotene content in
sweet potato flours ranged from 2.68 to 3.79 mg/100 g wet
weight basis or 2.85 to 4.08 dry weight basis. This value was
consistent with previous measurements of 0.5–45 mg/100 g dry
weight basis of b-carotene in field-grown sweet potatoes of selected
cultivars (Grabowski, Truong, & Daubert, 2007). However,
presently, the values of b-carotene for all flour samples were
lower than those previously reported by Grabowski et al.