Lipid Analysis
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| show | bulk fat or oil
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| Measuring present status and evaluating stability are methods to analyze _____. | show 🗑
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| GC and TLC are methods to analyze _____. | show 🗑
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| show | extraction, chracterization
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| show | Addition of antioxidants, flush with nitrogen, avoid heat/light.
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| Name three physical characterization methods for bulk fats and oils. | show 🗑
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| Solid fat index is measured using _____ and is plotted as ____ vs _____. | show 🗑
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| show | NMR
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| _____ can be used to determine the actual percentage of fat in a sample. | show 🗑
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| _____ is a measure of degree of unsaturation. | show 🗑
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| show | The number of grams of iodine absrobed by 100 g of sample.
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| _____ gives the average molecular weight of triglycerides in a sample. | show 🗑
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| show | The number of mg of KOH required to saponify (give salt and glycerol) 1 g of sample.
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| _____ measures the fatty acids liberated upon hydrolysis of triglycerides. | show 🗑
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| show | Free fatty acids
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| show | Peroxides
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| Define peroxide value. | show 🗑
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| A freshly refined or very rancid oil will have a peroxide value of ____. | show 🗑
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| _____ estimates the amount of unsaturated aldehydes (secondary oxidation products) in a sample. | show 🗑
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| show | Totox value
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| show | Hexanal
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| show | False
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| The TBARs test measures a secondary oxidation product known as _____. | show 🗑
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| What is the disadvantage of TBARs test? | show 🗑
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| T or F: TBARs correlates better with sensory evaluation than peroxide value. | show 🗑
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| ____ is usually used to measure lipid oxidation in meat products. | show 🗑
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| Conjugated dienes absorb at ____ nm. | show 🗑
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| Conjugated trienes absorb at ____ nm. | show 🗑
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| show | 1. Subject sample to oxygen or heat
2. Monitor oxidation over time with present status test.
3. Determine the induction period before rancidity.
4. Use accelerated shelf-life studies
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| What can be fractionalized with gas chromatography? | show 🗑
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| What can be fractionalized with IR? | show 🗑
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| What can be fractionalized with HPLC? | show 🗑
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| show | Glycerols
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| How is Olestra analyzed in lipid fractions? | show 🗑
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