Determination of .beta.-carotene and other hydrocarbon carotenoids in red grapefruit cultivars

Review: Analysis of carotenoids in orange juice

“…Although the general trend is to saponify the extracted pigments, on other occasions this reaction is omitted, either to prevent losses of pigments and/or the formation of artifacts (Rouseff et al, 1992;Pupin et al, 1999) or because the analysis is aimed at the esterified carotenoids (Wingerath et al, 1996;Schlatterer and Breithaupt, 2005). In addition to this, it is important to bear in mind that saponification is not always recommended, as some carotenoids such us fucoxanthin or astaxanthin are highly unstable in a basic medium (Britton, 1991), although these pigments do not occur in orange juices.…”

Modulation of carotenoid biosynthesis during tomato fruit ripening through phytochrome regulation of phytoene synthase activity

“…Phytoene eluted at 34.1 min. Identification of the standard was confirmed by elution order and absorption spectra [31]. The redissolved hexane fractions from the assays were separated by HPLC on a 3.9 × 15 mm Xterra C18 column (Waters Inc., Mississauga, Ont.)…”

Carotenoid Dyes – Production

“…flesh colour, peel type/colour, stage of maturity, pH) and any other informative data, if available, such as origin, soil and climate, size, cultivar, harvest date, preservation and packing medium, will improve the applicability and comparability of data. Cultivar/varietal difference could be quantitative, as in the case of Brazilian mangoes [10], red-fleshed Brazilian papayas [12], citrus cultivars from Florida [13], red tomatoes [14], pandanus fruit [15] and yellow-fleshed sweet potatoes and pumpkin [16]. An example is shown in Table 14.1 for varieties of sweet potatoes and pumpkins found in Sri Lanka.…”