Reference

Electrochemical detection in HPLC in a natural product problem

Electrochemical detection in HPLC in a natural product problem. Smith, Roger M. (Dep. Chem., Univ. Technol., Loughborough/Leics. LE11 3TU, UK). Electrochem. Detect., [Proc. Symp.], Meeting Date 1981, 83-7. Edited by: Ryan, T. H. Plenum: New York, N. Y. (English) 1984. CODEN: 53JTAI. DOCUMENT TYPE: Conference CA Section: 17 (Food and Feed Chemistry) [6]-Shogaol [555-66-8], [6]-gingerol [23513-14-6], [8]-gingerol [23513-08-8], and [10]-gingerol [23513-15-7] were sepd. from exts. of fresh or dried ginger by HPLC on an ODS Hypersil column with MeCN-0.01% NaCl () as the mobile phase and with an electrochem. detector. The shogaol peak was greater in dried ginger than in fresh, which indicates that it is a dehydration product.

High-performance liquid chromatographic separation of pungency components of ginger

High-performance liquid chromatographic separation of pungency components of ginger. Baranowski, J. D. (Dep. Food Sci. Hum. Nutr., Univ. Hawaii, Manoa, Honolulu, HI 96822, USA). J. Chromatogr., 319(3), 471-4 (English) 1985. CODEN: JOCRAM. ISSN: 0021-9673. DOCUMENT TYPE: Journal CA Section: 17 (Food and Feed Chemistry) The major pungency components of ginger, gingerols, were detd. by HPLC on a 25 ′ 4.25 mm i.d. Whatman PXS 10/25 ODS column, isocratic elution with MeCN-2% HOAc (2:3), and detection by UV absorption at 270 nm. Three com. dried gingers from different sources were analyzed by the method. For each, the (6)-gingerol [23513-14-6] peak was inversely proportional in size to the (6)-shogaol [555-66-8] peak. Zingerone [122-48-5] eluted concurrently with a no. of other components indicating gradient elution maybe preferable to the isocratic elution. Since shogaols are in very low concn. in fresh ginger, and form during storage, their concn. may be a useful index of freshness.