Determination method of essential oil in rose beverage
A measurement method, rosette technology, applied in measuring devices, material separation, analysis of materials, etc., to achieve the effect of simple method, convenient operation and good separation effect
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Embodiment 1
[0027] S1: Prepare internal standard solution. Pipette 100 μL of 2-nonanol into a 100 mL volumetric flask, dilute to volume with absolute ethanol, and prepare 823 mg / L standard stock solution. Pipette 2.5mL of the standard stock solution into a 25mL volumetric flask, dilute to volume with absolute ethanol, prepare an 82.3mg / L internal standard solution, and store it in a low-temperature dark place for later use.
[0028] S2: Sample pretreatment. The sample used in this example is Nine Roses Beverage Huabensu Drinking Peach Flavored Plant Beverage produced by Nishi International Rose Industry Co., Ltd. Pipette 5mL of the sample rose beverage into a 20mL headspace bottle, add 3gNaCl, and then add 25μL of internal standard solution, put it into the magnetic stirring rotor, seal it; after stirring for 1h at 750r / min, insert the extraction head, the fiber head Place it in the upper space about 20mm away from the sample surface, extract for 30min at 50°C water bath temperature, tak...
Embodiment 2
[0034] S1: Prepare internal standard solution. Pipette 100 μL of 2-nonanol into a 100 mL volumetric flask, dilute to volume with absolute ethanol, and prepare 823 mg / L standard stock solution. Pipette 2.5mL of the standard stock solution into a 25mL volumetric flask, dilute to volume with absolute ethanol, prepare an 82.3mg / L internal standard solution, and store it in a low-temperature dark place for later use.
[0035] S2: Sample pretreatment. The sample used in this example is Nine Roses Beverage Huabensu Drinking Peach Flavored Plant Beverage produced by Nishi International Rose Industry Co., Ltd. Pipette 5 mL of the sample rose beverage into a 20 mL headspace bottle, add 3 g of NaCl, and then add 25 μL of internal standard solution and allyl hexanoate liquid, wherein the volume ratio of allyl hexanoate to the sample is 1:20. Put in the magnetic stirring rotor and seal it; after stirring at 750r / min for 1 hour, insert the extraction head, place the fiber head in the upper...
Embodiment 3
[0041] S1: Prepare internal standard solution. Pipette 100 μL of 2-nonanol into a 100 mL volumetric flask, dilute to volume with absolute ethanol, and prepare 823 mg / L standard stock solution. Pipette 2.5mL of the standard stock solution into a 25mL volumetric flask, dilute to volume with absolute ethanol, prepare an 82.3mg / L internal standard solution, and store it in a low-temperature dark place for later use.
[0042]S2: Sample pretreatment. The sample used in this example is Nine Roses Juice Beverage produced by Nishi International Rose Industry Co., Ltd. Pipette 5mL of the sample rose beverage into a 20mL headspace bottle, add 3gNaCl, and then add 25μL of internal standard solution, put it into the magnetic stirring rotor, seal it; after stirring for 1h at 750r / min, insert the extraction head, the fiber head Place it in the upper space about 20mm away from the sample surface, extract for 30min at 50°C water bath temperature, take out the handle, and directly enter the su...
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