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Table 2 Stability of polythionate and thiosulfate in samples from Cinder Pool, YNP

From: Sulfur geochemistry of hydrothermal waters in Yellowstone National Park, Wyoming, USA. III. An anion-exchange resin technique for sampling and preservation of sulfoxyanions in natural waters

   S2O32-/μM SCN-/μM
Sample Treatment Field, 8/23/95 Lab, 9/21/95 Lab, 7/20/96 Field, 8/23/95 Lab, 9/21/95 Lab, 7/20/96
S2O3 Standarda 46.5 46.7 42.9    
S2O3 Standarda 21.2 20.6 19.0    
SCN Standard     9.2 9.5 9.3
SCN Standard     3.5 3.6 3.7
CD-2 None 45.0 17.1 6.2    
CD-2 ZnCl2 45.5 50.4 53.3    
CD-2 KCN 53.2 52.0 60.3 11.1 14.1 19.9
CD-3 None 43.5 11.7 10.4    
CD-3 ZnCl2 43.8 48.2 50.0    
CD-3 KCN 48.9 52.1 51.9 5.7 12.5 11.4
CD-4 None 42.9 16.19 7.6    
CD-4 ZnCl2 42.8 46.1 48.3    
CD-4 KCN 45.5 48.3 52.4 4.1 11.5 12.1
  1. aThiosulfate standards have pH > 7. In the field KCN was added to the samples to convert polythionates to SCN- using cyanolysis.74 Hence, this test pertains to the stability of SCN- over time as a measure of polythionate concentration and the formation of additional polythionate over time, which would be converted to SCN- in the bottle.