Rapid measurement method for total aldehyde content of notorious substance in bean product

Abstract

A rapid measuring method for fishy smell material aldehyde content in soya-bean products is characterized by the following: to weigh 40-60g soya-bean products for preparation and to put eight-time water into the soya-bean products and to shake evenly; to inject the even sample solvent into 250 ml iodine flask and to add 0.5 gram sodium acid sulfite 25 ml by pipet and to put it in shade area for thirty minutes with frequent shake; to accurately add 0.1 gram iodin standard solution 30ml and to evenly shake it and to titrate it with 0.05 gram hypo standard solution into light yellow solution; to add 1 ml starch indicator into a blue solution and continue titration into colourless solution to the end; then to record hypo consumption and at the same time to do blank experience, with aldehyde (g / 100ml) equals to (V#-[1]-V#-[2]) X 0.0025 / 50 (1-C) X 100.

Description

Technical field The invention belongs to a rapid determination method, in particular relates to the rapid determination of the total aldehyde content of fishy substances in soybean products. Background technique Soybean is a high-protein and high-oil oil crop. Its products not only have high protein content and rich nutrition, but also do not contain cholesterol and have good physiological functions. In recent years, the deep processing of soybean and other products of soybean more and more appear on the market, but, because the bean flavor that soybean product contains, has influenced its extensive application as protein source. There is lipoxygenase in soybeans, which accounts for 1% of the total protein content, which can catalyze the oxidation of unsaturated fatty acids in soybeans with oxygen in the air to produce fatty acid hydroperoxides. These fatty acid hydroperoxides are then decomposed by fatty acid hydroperoxide lyase, and finally generate volatile substances s...

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Problems solved by technology

However, for the above-mentioned rapid determination of the total aldehyde content of the fishy smell substances in soybean products, no relevant patent literature reports have been found after retrieval.

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