Abstract
AbstractPorcine insulin was analyzed in the presence of dissolved oxygen by constant current stripping analysis (CCSA) and potentiometric stripping analysis (PSA). The CCSA analysis involves the constant current reduction of mercuric insulin thiolate following its potentiostatic accumulation on a hanging mercury drop electrode. The CCSA response was quantitatively enhanced in the presence of dissolved oxygen. The PSA analysis involves the oxidation, by dissolved oxygen, of sulfhydryl groups in reduced insulin following its accumulation on the HMDE at −900mV (vs. SCE).
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