Full
Outline
To establish a method for the rapid determination of 13 kinds of metallic elements in agricultural products by ultrasonic-assisted acid extraction-inductively coupled plasma mass spectrometry.
The ultrasonic extraction method was adopted, with nitric acid solution as the extractant. By systematically optimizing key parameters such as the concentration of the extractant, ultrasonic time and temperature, inductively coupled plasma mass spectrometry was used to detect 13 kinds of metallic elements in edible agricultural products.
Comparative analysis with GB 5009.268—2025 National food safety standard-Determination of multiple elements in foods showed that ultrasonic extraction with 20% nitric acid at 55 ℃ for 20 minutes effectively extracted ten heavy metallic elements, such as sodium, magnesium, potassium, calcium, cadmium, arsenic, lead, copper, manganese and zinc from agricultural products. The extraction efficiency was comparable to that of the GB 5009.268—2025 microwave digestion method (the ratio between the results of ultrasonic acid extraction and those of the GB 5009.268—2025 microwave digestion method was between 0.8 and 1.0). However, the extraction efficiencies for aluminum, chromium and iron were unsatisfactory.
This method is suitable for rapid detection of most heavy metallic elements in agricultural products, offering advantages such as high efficiency, energy savings and low pollution. Nevertheless, and it is not applicable for quantitative analysis of aluminum, chromium or iron.
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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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