Preconcentration of thallium(III) with 2 6- bis(N-phenyl carbamoyl) pyridine on microcrystalline naphthalene prior to its trace determination in human serum spectrophotometrically

Preconcentration of thallium(III) with 2 6- bis(N-phenyl carbamoyl) pyridine on microcrystalline naphthalene prior to its trace determination in human serum spectrophotometrically
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