FDSN 507 Midterm 1
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| Esters of fatty acids, and monoglycerides are examples of ____ lipids. | simple
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| Phospholipids, lipoproteins, and glycolipids are examples of _____ lipids. | compound
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| Free fatty acids, long chain alcohols, hydrocarbons, and fat soluble vitamins are examples of ____ lipids. | derived
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| Name three ways of preparing samples for lipid analysis. | Predrying, particle size reduction, acid hydrolysis
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| What is the purpose of predrying for lipid analysis? | Breaks emulsions, helps free fat from tissue
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| _____ ____ breaks both covalently and ionically bound lipids | acid hydrolysis
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| Give four properties of a good solvent. | Low boiling point, non-flammable, inexpensive, low solvent power for proteins/carbohydrates, nonhygroscopic
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| ____ ____ is a good solvent for fat, but is more expensive and hygroscopic than _____ _____. | ethyl ether, petroleum ether
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| Define gravimetric analysis. | Measurement of fat content by fat removal from sample.
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| T or F: The Mojonnier method involves use of a series of solvents. | True
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| T or F: For the Mojonnier method, it is necessary to first remove all moisture from the product. | False
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| Supercritical fluid extraction involves elevated ____ and _____, with _____ decreasing. | pressure, temperature, pressure
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| Accelerated solvent extraction involves elevated ____ and _____. | pressure, temperature
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| The AOAC method for total fat determination is by ______. | Hydrolytic Extraction Gas Chromatographic Method
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| ____ acid can be used in gas chromatography to minimize oxidative degradation of fatty acids. | Pyrogallic
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| ____ is added as an internal standard in gas chromatography. | triglyceride
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| What three methods can be used to extract fat with ether? | Soxhlet, Goldfish, Mojonnier
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| ____ ____ is used to separate and quantify different fatty acid methyl esters. | Gas chromatography
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| The _____ method is a non solvent wet extraction method. | babcock or gerber
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| In the babcock method, _____ acid digests protein, generates heat, and releases fat. | sulfuric
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| What is the difference between the babcock and gerber methods? | Amyl alcohol is also used in the babcock method.
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| qWhat is the purpose of isoamyl alcohol in the gerber method? | Prevents the charring of sugar
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| What type of IR is used for milk fat? | Mid
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| Describe the Foss-Let method. | Fat is determined as a function of the specific gravity of a sample solvent extract.
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| What is the advantage to using NMR to analyze fat? | nondestructive
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