Use of tetrazolium salts in dosimetry of ionizing radiation

The paper summarizes the results obtained with participation of the authors from the study on the use of liquid and solid solutions of tetrazolium salts of different origin for dosimetry of ionizing radiation. The dosimetric systems based on the aerated solutions of some tetrazolium salts with nitro groups (for example, 2-(p-nitrophenyl)-3,5-diphenyltetrazolium chloride) in water-alcohol mixture which are suitable for measurement of doses from 1–5 to 50 Gy are described in detail. The application of poly(vinyl alcohol) films containing different tetrazolium salts for determination of doses from 0.5–25 kGy is considered thoroughly. The special attention was paid to the development of the films as color dose indicators with comparatively high stability to the action of day-light. It was achieved with the film containing 3,3′-bianisiline-4,4′-bis(2,5-diphenyl-2H-tetrazolium) chloride (blue tetrazolium).