Zinc is one of the essential trace elements, which also plays an important role in insulin and porphyrin
metabolism. In the solution of pH 8.5~9.5, the complex produced by Zn2+ and zinc reagent has a maximum
absorption peak at 620 nm.
Reagents and Equipment Required but Not Provided.
Spectrophotometer, centrifuge, pipette, 1 mL glass cuvette, vortex mixer/magnetic stirrer, distilled water.