A construction method and identification application of fingerprints of natural Chinese bee lychee honey and natural Italian bee lychee honey
A fingerprint and lychee honey technology, which is applied in instruments, measuring devices, scientific instruments, etc., can solve problems such as the inability to scientifically identify natural Chinese bee lychee honey and natural Italian bee lychee honey, lack of quality control indicators, and consumer trust crisis. , to achieve the effect of high sensitivity, high reliability and strong uniqueness
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Embodiment 1
[0022] Example 1: Construction of GC / MS fingerprints of natural Chinese bee lychee honey and natural Italian bee lychee honey
[0023] Put 20.00g of natural lychee honey samples and a magnetic stirrer into a 100mL headspace extraction bottle, adjust the rotation speed of the magnetic stirrer to 180rpm, mix well, keep at 70°C for 10min, and use a 50 / 30μm SPME extraction head (DVB / CAR / PDMS) at 70°C for 50 min; after the extraction, the SPME extraction head was taken out and quickly inserted into the injection port of the Agilent 7890BGC / 5977A MSD gas chromatography-mass spectrometer (GC-MS) for desorption for 5 min, and the GC Conditions: Agilent’s HP-5MS chromatographic column (30m×0.25mm×0.25μm) was used, the temperature of the injection port was 250°C, splitless injection, and the carrier gas was high-purity He (>99.999%); the temperature of the chromatographic column The program is: the initial temperature is 50°C, keep for 3min; 4°C / min to 130°C, keep for 5min; 10°C / min to...
Embodiment 2
[0037] Embodiment 2: the identification of natural lychee honey sample A to be tested
[0038] According to the construction method of the GC / MS fingerprint of the natural Chinese Italian bee lychee honey in Example 1, construct the volatile component total ion current chromatogram of the natural lychee honey sample A ( Figure 4 ), and the total ion chromatogram of the volatile components of natural lychee honey sample A was imported into the "Traditional Chinese Medicine Fingerprint Similarity Evaluation System (2012 Edition)", which was compared with the GC / MS fingerprint of natural lychee honey or natural lychee honey The GC / MS fingerprints of Italian bee lychee honey were matched to the peaks, and the similarity between them was calculated at the same time (Table 3). It can be seen from Table 3 that the similarity between the volatile component total ion chromatogram of the natural lychee honey sample A to be tested and the GC / MS fingerprints of the natural Chinese bee ly...
Embodiment 3
[0041] Embodiment 3: the identification of natural lychee honey sample B to be tested
[0042] According to the construction method of the GC / MS fingerprint of the natural Chinese Italian bee lychee honey in Example 1, construct the volatile component total ion current chromatogram of the natural lychee honey sample B to be measured ( Figure 5 ), and the total ion chromatogram of the volatile components of natural lychee honey sample B was imported into the "Traditional Chinese Medicine Fingerprint Similarity Evaluation System (2012 Edition)", which was compared with the GC of natural lychee honey or natural lychee honey / MS fingerprints for peak matching, and at the same time calculate its similarity with the two (Table 4). It can be seen from Table 4 that the similarity of the volatile component total ion chromatogram of the natural lychee honey sample B to be tested with the GC / MS fingerprints of the natural Chinese bee lychee honey and the natural Italian bee lychee honey...
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