Aldehyde Determination in Photographic Gelatin by Colour Reaction with Thiobarbituric Acid

Paper presented at the fourth 1AG Conference Fribourg (Switzerland) 1983.

† This word is used here with the meaning generally ascribed in gelatin chemistry and groups true aldehyde and aldehyde precursors.

‡ 1AG = International Working Group for Investigation of Restrainers in Photographic Gelatin under the chairmanship of Professor Hans Ammann-Brass (Switzerland).

Abstract

The yield of the gelatin-thiobarbituric acid reaction depends on the water content of the solvent. Under these conditions the results of the aldehydet determination in photographic gelatin by colour reaction with thiobarbituric acid are influenced by the composition of the solvent used for the reaction and are not specific characteristics of the analyzed gelatin.

Résumé

Le rendement de la réaction colorée gélatine-acide thiobarbiturique dépend de la teneur en eau du solvant. Dans ces conditions, les résultats des dosages d’aldéhydes dans les gélatines photographiques sont influencés par la composition du solvant réactionnel et ne peuvent être considérés comme des caractéristiques spécifiques des gélatines analysées.

Notes

Paper presented at the fourth 1AG Conference Fribourg (Switzerland) 1983.

† This word is used here with the meaning generally ascribed in gelatin chemistry and groups true aldehyde and aldehyde precursors.

‡ 1AG = International Working Group for Investigation of Restrainers in Photographic Gelatin under the chairmanship of Professor Hans Ammann-Brass (Switzerland).