Research Article
[Retracted] Chemical Speciation and Potential Mobility of Heavy Metals in the Soil of Former Tin Mining Catchment
Table 5
Results of analysis of standard reference materials (SRM) in comparison with certified values.
| Standard reference material | Analysed SRM value | Certified SRM value | Recovery% |
| Sequential extraction | SRM-027-050-Soil () |
| Step 1 | | | | As | | 4. | 88 | Cr | | | 85 | Zn | | | 100 | Cu | | | 69 | Pb | | | 101 | Sn | | | 103 |
| Step 2 | | | | As | | | 90 | Cr | | | 85 | Zn | | | 92 | Cu | | | 101 | Pb | | | 99 | Sn | | | 100 |
| Step | | | | As | | | 95 | Cr | | | 106 | Zn | | | 103 | Cu | | | 100 | Pb | | | 102 | Sn | | | 100 |
| Step 4 | | | | As | | | 120 | Cr | | | 128 | Zn | | | 120 | Cu | | | 115 | Pb | | | 104 | Sn | | | 111 |
| Total digestion | | | | CRM-027-050-Soil () | | | | As | | | 97 | Cr | | | 108 | Zn | | | 99 | Cu | | | 112 | Pb | | | 94 | Sn | | | 99 |
|
|