Table 1 The total amount of 231Pa in the blank derived from the chemicals, including the spike, resin, Fe, and acids, and the total procedural blank, including filtering for an acid-cleaned 0.8 μm Pall Supor800 polyethersulfone filter (for small particulates) and 51 μm Sefar polyester mesh prefilter (for large particulates)
Sample no. | 231Pa | Error | Sample type |
|---|---|---|---|
(ag/g) | /(2σ) | ||
Chem-blank-1 | 0.015 | 0.008 | Dissolved |
Chem-blank-2 | 0.013 | 0.006 | Dissolved |
Chem-blank-3 | 0.025 | 0.008 | Dissolved |
Chem-blank-4 | 0.020 | 0.003 | Dissolved |
Chem-blank-5 | 0.025 | 0.004 | Dissolved |
Average | 0.020 | 0.006 |
Sample no. | 231Pa | Error | Sample type |
|---|---|---|---|
(ag/g(1/8filter)) | /(2σ) | ||
GT8735db | 65.559 | 0.011 | Small particulate |
GT8702db | 8.212 | 0.003 | Small particulate |
GT9004db | 25.652 | 0.007 | Small particulate |
GT9062db | 29.761 | 0.006 | Small particulate |
GT9587db | 50.132 | 0.006 | Small particulate |
GT9594db | 34.950 | 0.005 | Small particulate |
GT9966db | 85.845 | 0.012 | Small particulate |
GT9971db | 38.720 | 0.006 | Small particulate |
GT8292db | 11.115 | 0.001 | Small particulate |
GT8348db | 62.386 | 0.004 | Small particulate |
GT3160db | 16.289 | 0.008 | Small particulate |
GT3193db | 9.858 | 0.004 | Small particulate |
GT2441db | 16.165 | 0.004 | Small particulate |
GT2326db | 9.326 | 0.006 | Small particulate |
GT2276db | 41.427 | 0.009 | Small particulate |
Average | 33.693 | 0.006 | |
GT8824dbQP | 21.450 | 0.009 | Large particulate |
GT8735dbQP | 60.654 | 0.011 | Large particulate |
GT8702dbQP | 26.372 | 0.008 | Large particulate |
GT9253dbQP | 22.628 | 0.006 | Large particulate |
GT9971dbQP | 27.383 | 0.009 | Large particulate |
GT3160dbQP | 17.800 | 0.006 | Large particulate |
Average | 29.381 | 0.008 |