Simple Method for Detection of Potassium Iodate (KIO_3) in a Kitchen Salt Using Cassava Starch (Manihot esculenta)

摘要

This research has been made a simple method for the detection of potassium iodate (KIO_3) in a kitchen salt using cassava starch (Manihot esculenta). The process of making this test kits using acid solvent as the reagent, KIO_3 solution, and indicator of cassava starch. The used cassava starch is in two conditions are dry starch for H_2SO_4 and wet starch for H_3PO_4. Based on the two solvents are then made a standard color series based on KIO_3 levels of 10, 20, 30, 40, and 50 ppm. Validation of this method has analyzed using Spectrophotometer UV-Vis. From the results of this analysis obtained calibration curve of each standard with both solvent. Coefficients determination for linearity using H_3PO_4 and H_2SO_4 solution is 0.9874 and 0.9656. From that results from the H_3PO_4 solution applied to the detection of potassium iodate (KIO_3) in a kitchen salt using cassava starch (Manihot esculenta) with a concentration in the range 30-40 ppm.