1, vitamin A identification method Vitamin A naked eye or grayish yellow particles. A sample of 0.1 g was taken, wet-ground with absolute ethanol and dissolved, chloroform (10 ml) was added, and a solution of antimony trichloride in chloroform (0.5 ml) was used. If the solution first appeared blue and faded immediately, it turned out to be vitamin A.
2, vitamin B1 identification method
Vitamin B1 looks white crystalline or crystalline powder, slightly odor, slightly bitter. Take 0.1g sample, add a little water to shake, filter, add 3 drops of iodine reagent in the filtrate, brown red precipitate.
3, vitamin B2 identification method
Appearance is yellow to orange yellow crystalline powder, bitter odor, take a sample of 0.5 grams, add a little water to dissolve, extract the supernatant, add 2 drops of dilute hydrochloric acid or sodium hydroxide solution, the yellow fluorescence disappears in the supernatant.
4, vitamin E identification method
The appearance of vitamin E is white or pale yellow powder. Take 15 mg of the sample, add 10 ml of absolute ethanol to dissolve it, add 2 ml of nitric acid, shake and heat for 15 minutes, and dissolve orange-red.
5, vitamin K3 identification method
Vitamin K3 is a white or grayish-brown crystalline powder that appears to be on the surface. Take a sample of 0.1 grams, add 10 ml of water to dissolve it, and add 3 ml of sodium carbonate solution to produce a genuine yellow precipitate.
6, the identification of ferrous sulfate
Take 0.1g sample and dissolve in 10ml water. Take 2-3 drops of 10% iron potassium chloride solution from the solution to generate a dark blue precipitate. Add a few drops of diluted hydrochloric acid. The precipitate will not dissolve into the authentic product.
7, the identification of magnesium sulfate
Take 1 gram of sample, dissolve in 10 milliliters of water, add ammonia water to have white precipitate, add appropriate amount of ammonium chloride to precipitate and dissolve. Add 5% disodium hydrogen phosphate solution, a white precipitate formed, insoluble after adding ammonia, it proved to be genuine.
8. Identification method of potassium iodide
A sample of 0.5 g was dissolved in 5 ml of water, 1 ml of a hydrochloric acid solution was added in a ratio of 1:1, and then 1 ml of a starch solution was added and the solution was blue.
9. Identification method of potassium sulfonate
One gram of sample was placed in a test tube and 2 ml of sulfuric acid was added. After 10-15 minutes, gas formation was observed.
The color of Vacuum Fried Onion Flakes is same as fresh onion Flakes.
Wanyuan Garlic Foods has specialized in VF,FD and AD Vegetables since 2005.Wanyuan Garlic Foods get a patent for Vaccum Fried Onion products.
Crispy VF Onion Flakes can be eat directly as snacks and in cooking.
Vacuum Fried Onion Flakes
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