Cs–Ba separation using N2O as a reactant gas in a Multiple Collector-Inductively Coupled Plasma Mass Spectrometer collision-reaction cell: Application to the measurements of Cs isotopes in spent nuclear fuel samples

135Cs/137Cs Isotopic Ratio as a New Tracer of Radiocesium Released from the Fukushima Nuclear Accident

“…27 N 2 O gas was introduced into the octopole reaction cell to eliminate polyatomic and isobaric interference, such as MoAr + , 135 Ba + , and 137 Ba + , for the measurement of 135 Cs and 137 Cs. 28 As shown in Figure S1 of the Supporting Information, the Ba signal intensity was suppressed by 4 orders of magnitude. In addition, the triple-quadrupole ICP-MS/MS system uses the tandem mass spectrometer configuration with two quadrupole mass filters (Q1 and Q2), which significantly improved the abundance sensitivity.…”

Ultra-trace determination of 90Sr, 137Cs, 238Pu, 239Pu, and 240Pu by triple quadruple collision/reaction cell-ICP-MS/MS: Establishing a baseline for global fallout in Qatar soil and sediments

“…We observed that N 2 O was most efficient for the removal of the isobaric 137 Ba signal. The 137 Ba signal decreased rapidly and became negligible at an N 2 O flow rate of 650 mL/min, with a corresponding maximum intensity observed at masses 153 and 154, indicating the formation of 137 Ba 16 O and 137 Ba 16 O 1 H. The heat of reaction of N 2 O with Cs þ to form CsO þ is 106.3 kJ/mol and is endothermic, so the reaction is not likely to occur (Granet et al, 2008). However, the heat of reaction of Ba þ with N 2 O to form BaO þ is À236.8 kJ/mol, making it exothermic and thermodynamically favorable (Granet et al, 2008).…”

“…The 137 Ba signal decreased rapidly and became negligible at an N 2 O flow rate of 650 mL/min, with a corresponding maximum intensity observed at masses 153 and 154, indicating the formation of 137 Ba 16 O and 137 Ba 16 O 1 H. The heat of reaction of N 2 O with Cs þ to form CsO þ is 106.3 kJ/mol and is endothermic, so the reaction is not likely to occur (Granet et al, 2008). However, the heat of reaction of Ba þ with N 2 O to form BaO þ is À236.8 kJ/mol, making it exothermic and thermodynamically favorable (Granet et al, 2008). A mixture of He and the reactive gas N 2 O was used to remove 137 Ba and increase the detection sensitivity by collision focusing in the reaction cell (Amr and Abdel-Lateef, 2011).…”

Purification of a 166mHo solution by successive high-performance liquid chromatography and gravitational chromatography for half-life determination

“…The Er isotopic composition was measured by an MC-ICP-MS (IsoProbe, VG Instruments) which has already been described elsewhere [18]. The 166 Er ion beam was optimized before each analytical session by adjusting experimental parameters as shown in Table 1.…”