Specificity of the Free Fatty Acid Titration by the Method of Dole, Modified According to Trout

The specificity of free fatty acid (FFA) titration is significantly enhanced when the modification of Trout (5) is used and the heptane extract washed with dilute sulfuric acid. Lactate, pyruvate, acetate, β-hydroxybutyrate, α-ketoglutarate, citrate, and urate, in concentrations found in normal human plasma, will not interfere with the titration. It can be expected that in some exceptional pathologic conditions, lactate, pyruvate, acetate, β-hydroxybutyrate, and urate will not be completely removed from the heptane extract. Salicylate seems to cause considerable interference. Trout's procedure substantially reduces the interference caused by phospholipids.

[Apropos of gene carriers of Fuch's atrophia gyrata choroideae et retinae]

Alder's anomaly of the leucocytes, which had been considered as a manifestation of the gene-carrier of Fuchs' atrophia gyrata chorioideae et retinae, has not been found in other cases of the latter disease.