Sterols in mollusks and crustacea of the Pacific Northwest

• Published in: Journal of the American Oil Chemists' Society
• Main Author: Gordon, D. T.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1982
• Subjects: Pacific; Crassostrea gigas
• Online Access: http://dx.doi.org/10.1007/bf02636318; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1007%2FBF02636318; https://onlinelibrary.wiley.com/doi/full/10.1007/BF02636318

Abstract There are at least eight major sterols in mollusks and cholesterol predominates in shrimp and crab of the Pacific Northwest. Depending on the analytical method used, significantly different values for total sterols in mollusks are obtained. Using combined gas liquid chromatography for Δ 5 sterols and a modified Liebermann‐Burchard reaction for Δ 5,7 sterols, an average total sterol and cholesterol content in oysters ( Crassostrea gigas ) of 170±21 mg and 51±10 mg/100 g, respectively were found. Approximately one‐half these amounts were found in 7 other mollusks. Dungeness Crab ( Cancer magiter ) and Pacific shrimp ( Pandalus joradani ) contain 50 and 144 mg cholesterol/100 g, respectively. For these crustacea, this represents 99% of the total sterols present. In mollusks, the percent non‐esterified sterols ranges from 49.6 to 100%, with a mean of 73%. Only free cholesterol is present in Dungeness crab. Proximate composition of all samples, including oysters analyzed over a 9‐month period is reported.