Enzymatic method and its validation for the micromolar assay of glucose in human serum samples

This work depicts the novel chromogenic system for the assay of glucose in blood samples connected with the chelate formation of sulfosalicylic acid (SSA) with iron (Fe(III)) using glucose oxidase (GOD) presented. The purple-colored Fe-SSA chelate compound formed, maintain a strong absorption at 500 nm in the acidic buffer of pH 3.8. The Beer's law limit for the assay of glucose by rate, and a one-time method is in the range of 46–1295 μmol/L...