Objective To evaluate the uncertainty of determination oftotal cadmium (Cd), lead (Pb) and chromium (Cr) in soil by microwavedigestion and inductively coupled plasma mass spectrometry (ICP-MS).Methods To ensure the accuracy and reliability of the detection results,the uncertainty of total cadmium (Cd), lead (Pb) and chromium (Cr) insoil was determined by microwave digestion and inductively coupledplasma mass spectrometry (ICP-MS) and according to JJF1059.1-2012Evalution and Expression of Uncertainty in Measurement the syntheticuncertainty was calculated and the extended uncertainty was obtained.Results The main sources of uncertainty were the standard curvepreparation the repeatability measurement of samples and the standardcurve fitting the contribution rates to the uncertainty of $\mathrm{{Cd}},\mathrm{{Pb}}$ and Cr were50.4%~60.3%, 18.7%~26.1% and 12.1%~20.4%. The influence of sampleweighing and resolution volume for the uncertainty was small and thecontribution rate was between 1.5%~2%, which could be ignored.Conclusion The effective measures to control uncertainty were putforward, which ensured the reliability of the experimental data andprovided the reference for the accurate representation of the heavymetal content in soil
| 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 |