Extraction, purification and detection method and application of geophila herbacea volatile oil
A technology of purification method and detection method, which is applied in the field of extraction, purification and detection of the volatile oil of argyria, can solve the problems of less argyria, achieve the effects of low water content, prevent coking of raw materials, and increase the extraction rate
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Embodiment 1
[0070] Example 1: Preliminary experiment
[0071] Different extraction methods were used to extract the volatile oil of Aidi grass, as follows:
[0072] 1. Steam distillation method:
[0073] (1) Take 500g of dry edible grass powder and grind it, add 1000g of distilled water and stir for steam distillation. The distillation extraction time is 5h to obtain a water system containing volatile oil;
[0074] (2) Add ether to the volatile oil-containing water system for extraction, discard the separated water layer, add anhydrous sodium sulfate to the volatile oil-containing ether solution for dehydration, filter and recover the ether to obtain dry and pure volatile oil.
[0075] 2. Simultaneous distillation extraction method:
[0076] Weigh 500g of dry grass powder and grind it in a distillation flask towel, add 1000g of distilled water, and measure ether in the distillation flask, connect to the simultaneous distillation and extraction device, and collect the ether liquid for distillation an...
Embodiment 2
[0083] Example 2: Extraction and Purification Method of Volatile Oil of Aidi Grass
[0084] (1) Take 500g of fresh grass, wash and dry, and smash to a particle size of 60 mesh, add 1000g of distilled water and stir for steam distillation. The distillation extraction time is 5h to obtain a water system containing volatile oil;
[0085] (2) Add ether to the volatile oil-containing water system for extraction, discard the separated water layer, add anhydrous sodium sulfate to the volatile oil-containing ether solution for dehydration, filter and recover the ether to obtain dry and pure volatile oil; the extraction rate is 0.41% , The water content of the volatile oil is 0.65%.
Embodiment 3
[0086] Example 3: Detection Method of Volatile Oil of Lovelandia
[0087] GC-MS was used to detect the volatile oil of A. diffusa obtained in Example 2. The specific detection conditions are as follows: HP-5MS chromatographic column (30m×0.25mm×0.25μm); carrier gas: helium; flow rate: 1.2mL / min, Solvent delay 5min; heating program: initial temperature is 60℃, keep for 1min, increase to 200℃ at 8℃ / min, keep for 5min, then increase to 280℃ at 5℃ / min, keep for 2min. Ionization method: EI, 70eV; ion source temperature: 250°C; carrier gas: helium; column flow rate: 1.2 mL / min. A total of 76 chemical components in the volatile oil of A. diffusa were detected. The specific chemical components and relative contents are shown in Table 2.
[0088] Table 2 Chemical composition of volatile oil
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