Table 1. Summary of the Experimental Parameters %Pmax and γSEOP, Obtained by Data Fitting to Monoexponential Growth (%Pmax and γSEOP) during SEOP Buildupa.
temp (°C) | %Pmax | γSEOP × 103 (min–1) | residual Rb TEC oven (ng) | residual Rb FA oven (ng)b |
---|---|---|---|---|
30 | 1.19 | |||
40 | 4.00 ± 0.21 | |||
42 | 21.7 ± 1.0 | 8.0 ± 0.6 | 1.64 | |
55 | 53.3 ± 2.1 | 14.1 ± 1.1 | 3.4 | |
72 | 90.1 ± 0.8 | 29.9 ± 1.2 | ||
74 | 85.1 ± 0.9 | 77.8 ± 4.0 | ||
temp-ramped (TR) | ⟨88.0 ± 0.9⟩ | ⟨62.5 ± 3.7⟩ |
Residual Rb content is reported as a function of OP-cell surface temperature based on the elemental analysis of an ∼1.0 L Tedlar bag containing ∼0.8 L of HP gas mixture after the transfer from the OP-cell through Teflon tubing with an in-line filter without cryocollection. Rb content obtained on the presented setup with a thermoelectric cooling (TEC) oven (ref (15)) utilized 1/8 in. o.d. (1/16 in. i.d.) Teflon tubing transfer lines with the temperature sensor mounted on the outer surface of the OP-cell. Residual Rb content obtained with the “open-source” hyperpolarizer with a forced air (FA) oven utilized 1/4 in. o.d. (1/8 in. i.d.) Teflon tubing transfer lines with the temperature sensor monitoring oven air temperature (refs (14 and 19)).
Ref (14).