Changes in the Contents of Oleoresin and Pungent Bioactive Principles of Jamaican Ginger (Zingiber officinale Roscoe.) during Maturation

Abstract

Changes in the yields of the oleoresin and content of pungent bioactive principles: [6], [8], [10] gingerols and [6] shogaol of Jamaican ginger ( Zingiber officinale) were investigated during different stages of maturity (7-9 months). Ethanolic oleoresin extracts were prepared (95%, w/w) by cold maceration of dried ginger powder, and their percentage yields were calculated (w/w). The pungent bioactive principles in the ginger oleoresin were extracted with methanol and quantitatively analyzed by high performance liquid chromatography (HPLC). Ginger harvested at 8 months from Bourbon, Portland had the highest oleoresin yield (8.46 +/- 0.46%). [6] Gingerol was found to be the most abundant pungent bioactive principle in all the oleoresin samples investigated, with the 9 months sample from Bourbon, Portland containing the highest level (28.94 +/- 0.39%). The content of [6] gingerols was also found to be consistently high (7-9 months) in oleoresin samples from Johnson Mountain, St. Thomas (15.12 +/- 0.39 to 16.02 +/- 0.95%). The results suggest that Bourbon in Portland may be the most ideal location for cultivating ginger for high yields and quality, however, Johnson Mountain in St. Thomas could prove to be the least restrictive location, allowing for harvesting of good quality material throughout the maturity period (7-9 months).

Influence of Cultivar and Maturity at Harvest on the Essential Oil Composition, Oleoresin and [6]-Gingerol Contents in Fresh Ginger from Northeast India

“…However, the oleoresin yield of 9-month-matured NER ginger cultivars in this study was found to be higher than Cochin ginger (4.25%) and closer to ginger from Sierra Leone (7.2%), Nigerian ginger (6.5%), and Ghana ginger (5.7%). 3 Two Jamaican ginger cultivars showed 7.25% (Bourbon and Portland) and 7.18% (Retreat and St. Mary) of the oleoresin yield at 9-month maturity, 16 which are found to be similar to the Tripura II cultivar.…”

Optimization of Extraction Conditions for the 6-Shogaol-rich Extract from Ginger (Zingiber officinale Roscoe)

“…Many qualitative and/or quantitative methods have been reported for analysis of fresh (16–18,23) and dried ginger (24). A variety of solvents such as methanol (16, 17), ethanol (18,25), DCM (23), acetone (25), and pressurized CO 2 (19,20) have been used for ginger extraction.…”

Ultrasound-assisted extraction and fast chromolithic method development, validation and system suitability analysis for 6, 8, 10-gingerols and shogaol in rhizome of Zingiber officinale by liquid chromatography-diode array detection

“…[10] A large number of HPLC and HPTLC methods for the quantification of 6-gingerol in [11,12] ginger oil, [13] crude drugs drink, [14] commercial Ayurvedic formulation [15] and rhizome [16] have been reported in the literature. The literature survey also revealed that quantification of other ginger homologues (8,10 gingerols) with 6-gingerol, [17] other diterpenes in Japanese gingers, [18] green and dried ginger, [19] freeze dried CO 2 extract, [20] three gingerols [21] with 6-shogaol in Jamaican ginger, [22] commercial ginger, fresh and dried rhizome and dietary supplements, [23][24][25] with have also been reported. Until date, no report on chromolithic separation of 6, 8, 10-gingerols and shogaol for the quantification, validation and system suitability in the ginger rhizome has been reported.…”