Rapid determination of vitamin C content of tomato fruit using filter paper which absorbs DCP

Rapid determination of vitamin C content of tomato fruit using filter paper which absorbs DCP

1985

A:PS

A new rapid testing method for the vitamin C content of tomato fruit was studied using filter paper which absorbs DCP, and which is based on capillarity analysis (Kuroki, 1982). Filter paper (TOYO No. 528, 4 x 80 mm) was dipped into a 95% ethanol solution in which 0.05-0.20% DCP was dissolved and dried in an oven heater (30 C) for one night to make the DCP filter paper strip (DCPFS). When a DCPFS was put into standard ascorbic acid solutions (5-50mg%, in 5% metaphosphoric acid), the ratio of the bleached part to the whole length of the DCPFS (Rr) was measured and the calibration formula was made as follows; log Y = d x log[X/(1-X)]+e (Y represented ascorbic acid concentration, X meant Rr value and d, e were constants.) It was also possible to preserve the DCPFS in silicagel for about one month at room temperature. These results indicate that the DCPFS method is quite effective to use as the rapid testing method of vitamin C content for tomato, although there still remain some problems.

no.5:1-11, VEGETABLE AND ORNAMENTAL CROPS RESEARCH STATION, BULLETIN (SERIES B)

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