RESUMO
A flow-injection method for the determination of tiopronin in the range 1 x 10(-7)-7 x 10(-5) M is described. The procedure is based on the chemiluminescent reaction of tiopronin with cerium(i.v.) in sulphuric acid medium using rhodamine 6G and quinine as fluorophors. The flow-injection method is rapid and precise and allows measurements of up to 80 solutions per hour. The applicability of the method to the determination of tiopronin in pharmaceutical preparations was demonstrated by investigating the effect of potential interferences and by analysing commercial preparations.
Assuntos
Análise de Injeção de Fluxo/métodos , Preparações Farmacêuticas/química , Tiopronina/análise , Artefatos , Medições Luminescentes , Reprodutibilidade dos TestesRESUMO
The digestive microflora produces a decrease of the mucosal histamine content in the wall of the chicken colon but has no significant incidence in the upper part of the digestive tract. The anatomical and physiological particularities of the chicken digestive tract permitted to observe that wall histamine concentration depends on different factors. Endogenous factors control the wall histamine content in the proventriculus, independantly of the diet and/or of the presence of a microflora. Diet has a specific incidence upon the gastrointestinal wall of the host in the crop and in the colon. The colon microflora decreases the effect of the diet essentially when the chicken are fed a semi synthetic diet. Interactions between the diet and the microflora could induce physiopathological manifestations.
