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| sample (source) | analysis | U conc. (ppb) |
Th conc. (ppb) |
K conc. (ppm) |
comments | |
| by | method | |||||
| Al | W | GES | < 5 - 2700(a) | 80 - 2300(b) | < 10 - 500 | |
| Al | W | GES | 0.5(c) | 8(c) | 40 | (P) |
| Al (U. Min. & Chem.) (6N) | W | GES | <0.5(c) | <2(c) | < 6 | (P) |
| Al sheet | W | GES | < 0.7 - 20(c) | < 8 - 370(c) | < 270 | (P) |
| Al 25 (Harshaw) | W | GES | <7(c) | 50(c) | 540 | (P) |
| Al 1100 (Alcoa) | W | GES | <3(c) | 30 - 100(c) | < 60 | (P) |
| Al 3003 (Alcoa) | W | GES | <3(c) | 40(c) | 300 | (P) |
| Al 6061 (Alcoa) | W | GES | 4(c) | 170(c) | < 30 | (P) |
| Al2O3 (Harshaw) (reflector) | W | GES | <7(c) | 45(c) | < 160 | (P) |
| Apiezon O | W | GES | 440(c) | 1900(c) | 1500 | (P) |
| Be | W | GES | 950(a) | 110(b) | < 600 | |
| Be (window) | W | GES | 390(c) | 530(c) | < 6 | (P) |
| CaCO3 | W | GES | 0.25(6)(c) | 1.2(c) | < 5 | (P) |
| CdF2 (Harshaw) (light guide) | W | GES | <0.3(c) | <1.3(c) | < 6 | (P) |
| Charcoal | W | GES | <0.5(c) | <1.3(c) | < 11 | (P) |
| Cu | W | GES | < 1 - 4(a) | <4(b) | < 6 | |
| Cu OFHC | W | GES | < 1 - 14(a) | <4(b) | < 6 | |
| Cu rod | W | GES | <3(c) | <8(c) | < 50 | (P) |
| Cu sheet | W | GES | <0.6(c) | <20(c) | < 110 | (P) |
| Cu 101 | W | GES | <0.07(a) | <0.4(b) | < 0.3 | |
| Cutting oil | W | GES | <4(a) | <5(b) | < 11 | |
| Electrical tape (3M) | W | GES | <6(c) | <16(c) | < 50 | (P) |
| Epoxy | W | GES | < 100 - 7×104 (a) | 600 - 5×104 (b) | 600 - 4×104 | |
| Epoxy | W | GES | 1(c) | 2.5(c) | 100 | (P) |
| Fe, `old' | W | GES | <0.5(c) | <1.3(c) | < 6 | (P) |
| Ge cylinder | W | GES | <1(c) | <4(c) | < 11 | (P) |
| Ge cylinder | W | GES | <2(c) | <8(c) | < 22 | (P) |
| Ge ingot | W | GES | < 2(c) | < 8(c) | < 27 | (P) |
| Glass tubing | W | GES | 30(c) | 200(c) | 2700 | (P) |
| Grease, HV | W | GES | <10(a) | <10(b) | < 5 | |
| In | W | GES | <4(a) | <10(b) | < 11 | |
| Lacquer | W | GES | <0.5(c) | <0.8(c) | < 22 | (P) |
| Lavite clay(d) | W | GES | 290(c) | 1600(c) | 5400 | (P) |
| Lucalox | W | GES | 40(c) | 250(c) | 540 | (P) |
| Millipore | W | GES | <0.9(c) | <0.8(c) | < 6 | (P) |
| Mg ingot (Dow) | W | GES | <0.2(c) | <4(c) | < 11 | (P) |
| Mg rod | W | GES | <4(c) | 25(c) | 50 | (P) |
| MgO | W | GES | 6(1)(c) | 7(2)(c) | 100 | (P) |
| MgO (Harshaw) (reflector) | W | GES | < 5 - 14(c) | < 20 - 36(c) | < 120 | (P) |
| Molecular sieve | W | GES | 1500 - 4000(a) | 5000 - 6000(b) | 4000 - 5000 | |
| Molecular sieve | W | GES | 300(c) | 1900(c) | 4900 | (P) |
| Mylar, aluminized | W | GES | 300(a) | <1100(b) | < 1100 | |
| NaI(Tl) | W | GES | <6(a) | <40(b) | < 20 | |
| Neoprene | W | GES | <1(c) | <3(c) | < 190 | (P) |
| Pb | W | GES | <0.06(a) | <0.2(b) | < 0.06 | |
| Pb (Cominco) | B | ? | 210Pb 26 kru | |||
| Pb (`New Doe Run') | B | ? | 210Pb 8 Mru | |||
| Pb (`Old Doe Run') | B | ? | 210Pb 30 Mru | |||
| Pb (Roman, Spanish) | B | ? | 210Pb £ 9 kru | |||
| Pb shavings | W | GES | <1(c) | <3(c) | < 20 | (P) |
| PCB | W | GES | 5500(a) | 2.3×104 × (b) | 2200 | |
| Plastic tubing | W | GES | <6(a) | 50(b) | < 500 | |
| Portland cement | W | GES | 130(c) | 100(c) | 2400 | (P) |
| PVC foam | W | GES | 40 - 90(c) | < 80 - 400(c) | 190 - 900 | (P) |
| Pyrex (Harshaw) (window) | W | GES | 26(c) | 180(c) | 2100 | (P) |
| Quartz (Harshaw) (window) | W | GES | <1.7(c) | <7.5(c) | < 40 | (P) |
| Quartz | W | GES | < 30 - 1400(a) | 70 - 700(b) | < 110 | |
| `Reflector materials' | W | GES | < 1 - 300(a) | < 1 - 1100(b) | < 3 - 200 | |
| Rubber | W | GES | 100 - 120(c) | 50(c) | 1000 | (P) |
| Rubber, foam (US Rubber) | W | GES | 1500(c) | 800(c) | 1.34×104 | (P) |
| Rubber, sponge | W | GES | 110 - 1600(a) | 600 - 2300(b) | < 220 - 1100 | |
| Se (59S) | W | GES | 1(c) | 16(c) | 5560 | (P) |
| Silica, fused | W | GES | <15(a) | <250(b) | < 60 | |
| Silicone foam | W | GES | 70(a) | 230(b) | < 110 | |
| Solder | W | GES | 50(c) | 160(c) | < 6 | (P) |
| Solder | W | GES | <1(a) | <4(b) | < 6 | |
| Steel, pre-WW II | W | GES | <1.2(a) | <6(b) | < 6 | |
| Steel, stainless 304 | W | GES | 0.7(c) | <2.5(c) | 33 | 60Co 30 kru (P) |
| Steel, stainless 304-L | W | GES | <0.5(c) | <2(c) | < 11 | 60Co 30 kru (P) |
| Steel, stainless | W | GES | <8(a) | <25(b) | < 110 | |
| Teflon | W | GES | < 2 - 10(a) | <4(b) | < 11 | |
| Ti | W | GES | < 0.2 - 4(c) | 0.8(c) | < 6 | (P) |
| Wire, teflon coated | W | GES | <2(a) | <50(b) | < 11 | |
| Analysts: | Analysis methods: |
| B: R. L. Brodzinski | GES: Gamma Emission Spectroscopy |
| W: N. A. Wogman et al. |
Notes:
| (a): | from 214Bi g count, U chain assumed in equilibrium. |
| (b): | from 208Tl g count, Th chain assumed in equilibrium. |
| (c): | U, Th quoted in disintegrations min-1g -1, chains in equilibrium. I convert assuming this is disintegrations in chain. |
| (d): | `Old-style surface barrier detectors' |
| (P): | pre-Homestake results of the Pacific Northwest Laboratory group. |
Other remarks:
