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Silicon is an essential trace element for the human body and generally exists in mineral water in the form of metasilicic acid. The accurate detection of metasilicic acid, a crucial boundary indicator for natural mineral water, is essential for determining compliance within quality standards. The GB 8538—2022 China national food safety standard—Testing methods for natural mineral drinking water specifies 2 kinds of spectrophotometric techniques, the silicomolybdic yellow method and the silicomolybdic blue method, for the detection of metasilicic acid. However, due to factors such as the stability of colorimetric solutions in spectroscopic analysis and differences in absorption wavelengths, the application of these 2 kinds of methods in metasilicic acid detection still presents issues that require further improvement. Researchers have also reported a number of determination methods for metasilicic acid based on different technologies, such as flow injection (FI), inductively coupled plasma optical emission spectrometry (ICP-OES), inductively coupled plasma mass spectrometry (ICP-MS), ion chromatography (IC), high performance liquid chromatography (HPLC). This article compared the advantages and existing problems of these methods, so as to provide references for the improvement of existing methods and the development of new methods for metasilicic acid determination.
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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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