Table 4 Summary STRIP distillation results for Na 2 SO 4
From: Modern applications for a total sulfur reduction distillation method - what’s old is new again
Identifier | Amount (mg) | Area (V∙s) | δ34SVCDT‰ | mmol S | Area/mmol | |
|---|---|---|---|---|---|---|
Na2SO4 (solid) | 0.366 | 54.9 | -2.4 | 0.0026 | 21313 | |
Na2SO4 (solid) | 0.368 | 57.1 | -2.9 | 0.0026 | 22037 | |
Na2SO4 (solid) | 0.386 | 61.7 | -2.8 | 0.0027 | 22709 | |
Na2SO4 (solid) | 0.387 | 77.5 | -3.0 | 0.0027 | 28454 | |
Na2SO4 (solid) | 0.364 | 87.2 | -2.1 | 0.0026 | 34028 | |
Na2SO4 (solid) | 0.481 | 74.8 | -3.2 | 0.0034 | 22088 | |
Na2SO4 (solid) | 0.352 | 83.5 | -2.6 | 0.0025 | 33691 | |
Na2SO4 (solid) | 0.364 | 71.5 | -3.3 | 0.0026 | 27903 | |
Na2SO4 (solid) | 0.489 | 96.4 | -3.1 | 0.0034 | 28001 | |
Average | -2.8 +/-0.4 | 26692 | ||||
C-14 (Na2SO4, solid, distilled) | 0.524 | 31.7 | -2.3 | |||
C-15 (Na2SO4, solid, distilled) | 0.481 | 30.7 | -2.6 | |||
Average | -2.5 +/-0.2 | |||||
BaSO4 (from control solution) | 0.381 | 55.7 | -2.4 | 0.0016 | 34152 | |
BaSO4 (from control solution) | 0.381 | 55.6 | -2.3 | 0.0016 | 34050 | |
BaSO4 (from control solution) | 0.474 | 66.5 | -2.6 | 0.0020 | 32764 | |
BaSO4 (from control solution) | 0.384 | 54.2 | -2.4 | 0.0016 | 32969 | |
Average | -2.4 +/-0.1 | 33484 | ||||
Amount (mg) | Area (V∙s) | δ 34 S VCDT ‰ | mmol S IRMS | Fraction sample weighed in | Distillation yield | |
1 ml 25 mM sulfate | ||||||
C18 | 0.431 | 25.0 | -2.3 | 0.0007 | - | - |
C19 | 0.590 | 36.8 | -2.9 | 0.0011 | - | - |
C22 | 0.429 | 40.1 | -3.4 | 0.0012 | - | - |
C23 | 0.592 | 57.6 | -2.0 | 0.0017 | - | - |
C34 | 0.472 | 33.7 | -2.3 | 0.0010 | 0.04 | 96% |
C35 | 0.606 | 47.3 | -2.2 | 0.0014 | 0.06 | 103% |
Average | -2.5 +/-0.5 | |||||
0.2 ml 25 mM sulfate | ||||||
C20 | 1.943 | 27.6 | -2.6 | 0.0008 | - | - |
C21 | 1.533 | 27.4 | -2.4 | 0.0008 | - | - |
C24 | 1.520 | 35.6 | -2.0 | 0.0011 | - | - |
C25 | 1.630 | 37.4 | -2.3 | 0.0011 | - | - |
C32a | 1.560 | 23.5 | -1.7 | 0.0007 | - | - |
C32b | 1.595 | 22.7 | -1.8 | 0.0007 | - | - |
C33a | 1.588 | 26.1 | -2.1 | 0.0008 | - | - |
C33b | 1.582 | 19.0 | -2.3 | 0.0006 | - | - |
C36 | 2.502 | 43.3 | -2.1 | 0.0013 | 0.26 | 100% |
C37 | 2.562 | 48.4 | -2.2 | 0.0014 | 0.29 | 98% |
C40 | 2.388 | 44.3 | -2.4 | 0.0013 | 0.35 | 77% |
C41 | 2.479 | 49.3 | -2.5 | 0.0015 | 0.30 | 100% |
C42 | 2.734 | 59.0 | -2.4 | 0.0018 | 0.29 | 121% |
Average | -2.2 +/-0.3 | |||||
C-38 (0.02 ml) | 4.165 | 7.9 | -2.0 | 0.0002 | 0.45 | 105% |
C-39 (0.02 ml) | 3.899 | 6.9 | -0.9 | 0.0002 | 0.51 | 81% |