Table 2. Analytical characteristics of LLE-ICP-OES method for the determination of the target ions.
| Element | Standards added (ng ml−1) | Linear equation | Linear range (ng ml-1) |
Coefficient (R2) | LODsa ng ml-1 (n = 7) |
RSDb (%) (n = 7) |
LOQsc ng ml-1 (n = 7) |
Recovery (%) |
|---|---|---|---|---|---|---|---|---|
| La | 0,20,200 | y = 7.292x+98.603 | 4–1000 | 0.9992 | 0.1378 | 1.8 | 0.4134 | 97.2 |
| Ce | 0,20,200 | y = 1.297x+56.947 | 4–1000 | 0.9994 | 0.3494 | 3.6 | 1.0482 | 106.8 |
| Pr | 0,20,200 | y = 1.116x+156.652 | 4–1000 | 0.9998 | 0.2526 | 2.0 | 0.7578 | 98.2 |
| Nd | 0,20,200 | y = 0.687x+23.334 | 4–1000 | 0.9995 | 0.0405 | 3.9 | 0.1215 | 106 |
| Sm | 0,20,200 | y = 0.776x+17.881 | 4–1000 | 0.9997 | 0.2275 | 2.6 | 0.6825 | 97.4 |
| Eu | 0,20,200 | y = 3.791x+10.445 | 4–1000 | 0.9999 | 0.0514 | 0.5 | 0.1542 | 102.4 |
| Gd | 0,20,200 | y = 1.365x+8.101 | 4–1000 | 0.9997 | 0.4064 | 3.1 | 1.2192 | 100.9 |
| Tb | 0,20,200 | y = 1.276x+25.798 | 4–1000 | 0.9999 | 0.2409 | 1.8 | 0.7227 | 95.9 |
| Dy | 0,20,200 | y = 1.867x+16.979 | 4–1000 | 0.9999 | 0.1816 | 2.1 | 0.5448 | 99.4 |
| Ho | 0,20,200 | y = 1.121x+16.218 | 4–1000 | 0.9997 | 0.5038 | 3.8 | 1.5114 | 102.9 |
| Er | 0,20,200 | y = 1.442x+13.705 | 4–1000 | 0.9996 | 0.0775 | 2.4 | 0.2325 | 99.1 |
| Tm | 0,20,200 | y = 3.502x+34.648 | 4–1000 | 0.9999 | 0.2913 | 4.0 | 0.8739 | 97.3 |
| Yb | 0,20,200 | y = 1.861x+18.328 | 4–1000 | 0.9999 | 0.0738 | 1.6 | 0.2214 | 100.9 |
| Lu | 0,20,200 | y = 7.302x+2.87 | 4–1000 | 0.9999 | 0.0998 | 2.1 | 0.2994 | 103.9 |
| Y | 0,20,200 | y = 3.158x+15.992 | 4–1000 | 0.9998 | 0.2187 | 3.2 | 0.6561 | 100.1 |
| Sc | 0,20,200 | y = 6.694x+24.293 | 4–1000 | 0.9996 | 0.0483 | 1.9 | 0.1449 | 103.5 |
aLODs: Limits of detection.
b: obtained for a concentration of 100 ng mL−1.
cLOQs: Limits of quantification