Abstract
An ion pair extraction method is described for quantitative fluorometric determination in the ng/ml range of non-fluorescent amines used as drugs. As counter ion, reagent, anthracene-2-sulphonate was used. Its extracting ability of ion pairs with amines was studied by determination of extraction constants and its fluorescence properties by determination of quantum yield of fluorescence. The properties of a suitable organic solvent is discussed and methylene chloride was found to be advantageous. Conditions for quantitative extraction and determination are given and the method was applied to determination of amitriptyline in the range 10–100 ng/ml giving an extraction degree of 100% and a precision of 5%.
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