Core | Mass accumulation rate (g/cm2/yr) | Sedimentation rate (cm/yr) | ||
---|---|---|---|---|
gamma method | gamma method | beta method | beta method | |
Lake Karackiai | 0.009 | 0.008 | 0.14 | 0.12 |
Lake Rajgrod | 0.060 | 0.055 | 0.41 | 0.33 |
Procedure | #1 | #2 | #3 |
---|---|---|---|
Pb2+ carrier | Radiochemical yield | ||
72 ± 6% | 77 ± 4% | 76 ± 4% | |
Precipitates of PbSO4 dissolved in | Solubility | ||
2 ml 6M ammonium acetate | 2 ml 3M ammonium acetate | 2 ml 0.5M EDTA/NaOH | |
+ | + | + | |
18 ml scintillation cocktailOptiphase nisaie 3 | Homogeneity | ||
PbSO4 in 2 ml 6M ammonium acetate | PbSO4 in 2 ml 3M ammonium acetate | PbSO4 in 2 ml 0.5M EDTA/NaOH | |
+ | + | – | |
210Pb tracer | Radiochemical yield | ||
70 ± 5% | 73 ± 8% | 70 ± 6% |