PETTENKOFER'S TEST FOR BILE ACIDS
\pˈɛtəŋkˌə͡ʊfəz tˈɛst fɔː bˈa͡ɪl ˈasɪdz], \pˈɛtəŋkˌəʊfəz tˈɛst fɔː bˈaɪl ˈasɪdz], \p_ˈɛ_t_ə_ŋ_k_ˌəʊ_f_ə_z t_ˈɛ_s_t f_ɔː b_ˈaɪ_l ˈa_s_ɪ_d_z]\
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Consists of dissolving a small amount of the bile in concentrated sulphuric acid in an evaporating dish and warming to a temperature not higher than 70. To this mixture is added a 10 per cent. solution of cane sugar, drop by drop, with continual stirring. If bile salts are present, the fluid turns red and, upon standing, becomes gradually blue. The red fluid, when just obtained, has a characteristic absorption spectrum.
By Smith Ely Jelliffe
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Nearby Words
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