Spectrum analyzers water removal

A tliird byproduct from citrus processing is citrus molasses (CM). CM is obtained from tlie spent citrus peel after the juice and peel oils are extracted The peels are furtlier processed to squeeze out residual juice sugars and peel oils. This mixture is concentrated by distillation wliich removes water and many of the volatile oil components present. A sample of 33 Brix orange molasses was analyzed for PMF content to compare with our other results. The HPLC spectrum (Figure 6) shows a very different absorption spectrum from the typical juice sample. A large (unidentified) peak is seen eluting before 2.5 minutes with the PMF peaks eluting later. The total PMF content in this... 

Beef, lamb, and pork muscles (m. longissimus dorsi) with attached adipose tissue were purchased from a local retailer. Adipose tissue was separated from muscle, and both were analyzed by SDE. Each sample was minced, and 100 g of either muscle or adipose tissue was placed in a 2-L round-bottomed flask, to which 750 mL of water was added. The samples were then extracted for 2 hr, using 30 mL of pentane/ether (9 1) as solvent. Two drops of silicone antifoaming agent were added to the meat samples. After the first extraction, each sample was extracted a second time, to determine whether any remained in the sample. The extracts were stored in a freezer overnight to remove water and concentrated to 0.2 mL. Methyl decanoate (500 ng) was added as an internal standard. Two replicates were performed for each extraction. A standard of pure (Z)-4-heptenal was also injected to determine its retention time and mass spectrum. 

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