US 12,031,938 B2
Gamma-irradiation-compatible reference gel
Jinbo Hu, Minnetonka, MN (US)
Assigned to Rosemount Inc., Shakopee, MN (US)
Filed by Rosemount Inc., Shakopee, MN (US)
Filed on Dec. 28, 2020, as Appl. No. 17/135,098.
Prior Publication US 2022/0205946 A1, Jun. 30, 2022
Int. Cl. B01L 3/00 (2006.01); B01F 23/00 (2022.01); B01F 23/41 (2022.01); B01F 101/23 (2022.01); B23Q 17/24 (2006.01); C08J 3/075 (2006.01); C08K 3/16 (2006.01); C08K 3/22 (2006.01); C08K 3/32 (2006.01); C12Q 1/18 (2006.01); G01N 21/64 (2006.01); G01N 27/411 (2006.01); G01N 33/50 (2006.01)
CPC G01N 27/4117 (2013.01) [C08J 3/075 (2013.01); C08K 3/16 (2013.01); C08K 3/22 (2013.01); C08K 3/32 (2013.01); C08K 2003/329 (2013.01); C08K 2201/014 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A gel for use in a pH or an ORP sensor, components of the gel comprising water, a reference electrolyte salt, a buffering system for adjusting pH of the gel, and a polymeric gelling agent that controls a viscosity of the gel wherein the viscosity is dependent on concentration and/or molecular weight of the polymeric gelling agent, or both,
wherein the gel does not degrade under gamma irradiation, and
wherein the polymeric gelling agent is polyethylene glycol having a molecular weight (Mw) of 15,000 or less.