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Outline
To establish an analytical method for the simultaneous determination of 25 kinds of mineral elements in Zhaotong Gastrodia elata Blume by inductively coupled plasma mass spectrometry, and evaluate and distinguish the differences in element content among Zhaotong Gastrodia elata Blume samples collected from different counties and districts.
The 39 samples of Zhaotong Gastrodia elata Blume collected from 8 districts in Zhaotong City were subjected to microwave digestion, and the concentrations of 25 kinds of elements were determined by ICP-MS. The validity of the method was verified through linear relationships, limits of detection,limits of quantitation, repeatability and spiked recovery rates. A fingerprint profile of mineral elements in Zhaotong Gastrodia elata Blume was established, and statistical software was used in conjunction with principal component analysis (PCA) and orthogonal partial least squares discriminant analysis (OPLS-DA) to perform origin analysis and identification.
The results showed that the method exhibited good linearity (r>0.995), high repeatability(relative standard deviation of 0.8%–7.1%), and high accuracy (spiked recovery of 93.2%–106.5%); the analytical results indicated that Zhaotong Gastrodia elata Blume was rich in mineral elements and exhibited distinct elemental characteristics of high potassium and low sodium. Through fingerprint analysis, elements such as K, Fe, Mn, Zn, Sr,Ba, and Al were identified as characteristic elements of Zhaotong Gastrodia elata Blume; PCA and OPLS-DA could be used to achieve preliminary differentiation among Zhaotong Gastrodia elata Blume from different counties, with 7 kinds of elements (Fe, Al, Mn, Sr, Ba, K and Zn) identified as playing a key role in classifying samples from different production areas.
The inductively coupled plasma mass spectrometry method can simultaneously determine multiple metallic elements in Zhaotong Gastrodia elata Blume. By analyzing the content and variation patterns of mineral elements in Zhaotong Gastrodia elata Blume, this study provides a reference for the mineral nutritional evaluation and quality safety risk assessment of Zhaotong Gastrodia elata Blume, and offers data support for its diversified resource development and utilization, product promotion and traceability.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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