Ascorbic acid and mineral composition of longan (Dimocarpus longan), lychee (Litchi chinensis) and rambuan (Nephelium lappaceum) cultivars grown in Hawaii

作者：Wall Marisa M^*

来源：Journal of Food Composition and Analysis, 2006, 19(6-7): 655-663.

DOI：10.1016/j.jfca.2005.12.001

• longan
• lychee
• litchi
• rambutan
• tropical fruit
• minerals
• vitamin C

Longan (Dimocarpus longan), lychee (Litchi chinensis), and rambutan (Nephelium lappaceum) cultivars were harvested from different locations in Hawaii and analyzed for vitamin C (ascorbic acid) and mineral content. Longan fruit had the highest vitamin C content (60.1mg/100 g fresh weight) among the three specialty fruits tested. Average ascorbic acid content was 27.6mg/100 g for lychees and 36.4mg/100g for rambutans. Vitamin C content was 63.3 and 55.3mg/100g for the longan cultivars, Biew Kiew and Sri Chompoo, respectively. For rambutans, vitamin C content ranged from 22.047.8mg/100g for the six cultivars tested. The early maturing lychee cultivar, Kaimana, had an average ascorbic acid content of 33.2mg/100 g, and the later maturing Groff and Bosworth-3 cultivars had 21.2 and 22.5mg/100 g, respectively. No correlation was found between ascorbic acid and total soluble solids (TSS) content. Longans were a good source of K (324.9 mg/100g) and Cu (0.26mg/100g). Consumption of lychee fruit (100g) would meet 2-4% of the daily recommended intake (DRI) for six minerals (P, K, Mg, Fe, Zn, Mn), and 22% of the DRI for Cu. Rambutan fruit had 20% of the DRI for Cu and 8-10% of the DRI for Mn. In general, fruit mineral content was not associated with soil mineral content.

• 出版日期2006-11