Quality detection method of eleutherine plicata
A quality inspection method, the technology of shallots, applied in the direction of measuring devices, instruments, scientific instruments, etc.
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Embodiment 1
[0032] Thin-layer chromatography identification method of red onion, as follows:
[0033] (1) Preparation of reference substance solution: Take an appropriate amount of shallot A reference substance, add ethanol to make a solution containing 0.2 mg of shallot A per 1 mL, as the reference substance solution.
[0034] (2) Preparation of the test solution: Take 1 g of the sample powder, add 30 mL of ethanol, ultrasonically treat for 30 minutes, filter, and concentrate the filtrate to 5 mL as the test solution.
[0035] (3) Identification: Take 5 μL each of the test solution and the reference solution, and place them on the same silica gel G thin-layer plate, and use petroleum ether (60-90°C)-ethyl formate with a volume ratio of 15:10:0.2 -Methanol mixed solution is used as developer, developed, taken out, dried, and inspected under 365nm ultraviolet light. In the chromatogram of the test product, spots of the same color appear on the positions corresponding to the chromatogram o...
Embodiment 2
[0039] The content determination method of red onion with one test and multiple evaluations is as follows:
[0040] (1) Chromatographic conditions and system adaptability test: Octadecylsilane bonded silica gel is used as filler; acetonitrile is used as mobile phase A, water is used as mobile phase B, and the set flow rate is 1.0mL / min, as shown in Table 1 below gradient elution according to the elution program; the detection wavelength is 254nm; the column temperature is 25°C; the number of theoretical plates should not be less than 5000 based on the calculation of the shallot peak.
[0041]
[0042] (2) Preparation of the reference substance solution: Take an appropriate amount of shallot reference substance, weigh it accurately, add ethanol to make a solution containing 0.4 mg of shallot in every 1 mL, and obtain the reference substance solution.
[0043] (3) Preparation of the test solution: Take about 0.1g of the sample powder, weigh it accurately, add 20mL of ethanol ...
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