Method for detecting neutral triterpenes in ganoderma fungus
A neutral and fungal technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems that there is no detection method for neutral triterpenes, the maximum ultraviolet absorption of compounds is inconsistent, and it is not comprehensive and objective.
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Embodiment 1
[0061] The establishment of embodiment 1 detection method
[0062] 1. The pretreatment step of Ganoderma lucidum fruiting body: Accurately weigh 6.56g of dried Ganoderma lucidum fruiting body samples (fruiting bodies 1, 2, 3, 4, 5) in a stoppered test tube, according to 1:36 (weight to volume ratio, weight g: volume ml) of solid-liquid ratio Add methanol 15mL, after ultrasonic extraction for 66min, take the supernatant, pass through a 6.26μm organic filter membrane and dilute 26 times (volume multiple) with mass spectrometry grade methanol to obtain the sample solution to be tested for loading ;
[0063] Preparation of mixed standard solution: Prepare mixed standard solution mother solution with mass spectrometry grade methanol (the concentration of compound 1 is 266 μg / mL; the concentration of compound 2, 3, 4, 5, 7, 8 is 166 μg / mL; the concentration of compound 6 is 56 μg / mL; the concentration of compounds 9, 10, and 12 is 25 μg / mL, and the concentration of compound 11 is ...
Embodiment 2
[0086] Methodology validation and result testing:
[0087] 1. Precision: Take the mixed standard solution with the highest concentration standard diluted 4 times and repeat the injection 6 times in the same day, calculate the concentration of triterpenes obtained in 6 experiments according to the standard curve, and calculate the intraday precision. Take the mixed standard solution of the highest concentration standard solution and dilute it step by step 4 times for three consecutive days, inject samples twice a day, and calculate the inter-day precision based on the results of 6 experiments. The results showed that the RSDs of the intra-day precision and inter-day precision of the 12 triterpenoids were less than 15.66%, which indicated that the method had good intra-day and inter-day precision. The specific results are shown in Table 2.
[0088] 2. Stability: take the fruiting body 5, extract according to the sample pretreatment step in Example 1, prepare a portion of the sa...
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