The use of 7-methylindole in the antimony trichloride colour test for vitamin A

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Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

1. 1The determination of vitamin A in cod-liver oils (<i>a</i>) biologically, (<i>b</i>) chemically, (<i>c</i>) physically, with a statistical examination of the results1931 · 41 citations
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4. 4The reaction of antimony trichloride with cod-liver oil and its unsaponifiable fraction1930 · 16 citations
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