Detection of essence parameters for food

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B. 1 Color verification

B.1.1 Liquid essence and paste (paste) essence

B.1.2 Powder essence

Place the sample and standard sample on a clean white paper respectively, and observe whether there is any difference by visual inspection

B.2 Evaluation of flavor

B.2.1 Preparation of test solution

Select one of the following methods to prepare according to the type of flavoring products:

b

c) Weigh 0.1g (accurate to 0.01g) of sample and standard sample respectively and put them into their respective small beakers. Add 100mL of distilled water respectively to prepare an aqueous solution containing 0.1% essence. Stir evenly to obtain the test solution

B.2.2 Evaluation Method

Take small sips of the test solution and identify any differences in its aroma characteristics, strength, and taste. The sample should comply with the standard sample of the same model.

. Rinse your mouth before each taste

B.3 Determination of moisture

According to the provisions of GB5009.3-2010.

. The arbitration method is the third distillation method

B.4 Determination of particle size

B.4.1 Emulsified essence

B.4.1.1 Instruments and equipment

>biological microscope larger than 600 times

B.4.1.2 Determination Method

Take a small amount of evenly stirred sample and place it on a glass slide. Drop an appropriate amount of water and gently press the sample with a cover glass to form a thin layer.

. Observe under a microscope

B.4.2 Capsule type powder essence

is determined by standard sieving method

Method 1: Unless otherwise specified, weigh 10g of the sample (accurate to 0.1g) and place it on a standard sieve of the specified number. The sieve is covered and equipped with a tightly sealed receiver under the sieve. Rotate and shake it horizontally for more than 3 minutes, and tap the sieve gently in the vertical direction from time to time. Take the particles and powders from the receiving container, weigh them, and calculate their percentage (%)

Method 2: Unless otherwise specified, weigh 30g of the sample (accurate to 0.1g) and place it on a large standard sieve of the specified size. The sieve is covered and equipped with a tightly sealed receiver under the sieve. Rotate and shake it horizontally for at least 3 minutes, and gently tap the sieve in the vertical direction from time to time. Then transfer all the samples in the container to a small standard sieve of the specified size and repeat the above operation. Weigh the particles and powder inside the small standard sieve (i.e. particles and powder that can pass the large standard sieve but cannot pass the small standard sieve) and calculate their percentage (%)

B.5 Determination of Stability of Raw Solution

B.5.1 Instruments and Settings

Centrifuge Precipitator

B.5.2 Measurement Method

Place the evenly stirred sample in three centrifuge tubes to the same scale, one as a control, and two into a centrifuge precipitator. Centrifuge at a speed of 2500r/min to 3000r/min for 15 minutes, and take it out. Compared to caregiving, there should be no stratification

B.6 Determination of Stability of Thousand Dilution Solution

Note: Choose one of the following two methods for determination.

B.6.1 72h test (arbitration method)

B.6.1.1 Instruments and equipment

B.6.1.1.1 1000mL volumetric flask

B.6.1.1.2 Soda bottle

B.6.1.1.3 Capping machine

B.6.1.1.4 Balance: accuracy 0.01g

B.6.1.2 Determination Method

Weigh 1.0g of evenly stirred sample, 80g to 120g of white granulated sugar, 1.0g to 1.6g of citric acid, and 100mL of distilled water, and heat to dissolve them all.

. After cooling, transfer to a volumetric flask and dilute with distilled water to the mark, resulting in a thousand fold dilution solution

Take approximately 300mL of a thousand fold dilution solution into a glass soda bottle and seal it. Let it stand horizontally at room temperature for 72 hours, and observe that there should be no oil floating on the surface of the solution and no precipitation at the bottom

B.6.2 Centrifuge Test

B.6.2.1 Instruments and Equipment

Centrifuge Precipitator

B.6.2.2 Determination Method

Place the thousand fold dilution solution in B.6.1.2 into three centrifuge tubes to the same scale, keep one tube as a reference, and place two tubes in a centrifuge precipitator. Centrifuge at a speed of 3000r/min for 15 minutes and remove.

. Compared with the control tube, the solution should have no oil floating on the surface and no sediment at the bottom

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