What is the Color if a Sample is Positive for an Iodine Test?
                                
                                
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                                    3 min read                                
                            
                                Over 50% of the food we consume contains some form of starch, making the iodine test a fundamental scientific procedure. A positive iodine test, used to detect the presence of starch, is identified by a dramatic color change from the original yellowish-brown iodine solution to a deep blue-black.