Milk is sometimes contaminated with substances such as starch. You will determine the concentration of starch in a sample of contaminated milk, using a range of starch standards. You are provided with the materials shown in Table 1.1. Table 1.1 labelled contents hazard volume/cm³ M milk none 50 SM 1.0% starch solution in milk (starch-milk) none 20 CM contaminated milk none 20 iodine iodine solution irritant 20 If any solution comes into contact with your skin, wash off immediately with cold water. It is recommended that you wear suitable eye protection. You will need to carry out a serial dilution of the 1.0% starch-milk solution, SM, to reduce the concentration by one fifth between each successive dilution. You will need to prepare four concentrations of starch-milk solution in addition to the 1.0% starch-milk solution, SM. You must use the milk, M, to dilute the starch-milk solution. Do not use water for the dilution. After the serial dilution is completed, you will need to have 8cm³ of each concentration available to use.