What is the spot test for fats?
                                
                                
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                                    5 min read                                
                            
                                The simplest and most classic method for determining the presence of fats or oils in a substance is the translucent spot test, also known as the grease spot test. This qualitative analysis works on the principle that lipids are hydrophobic and, unlike water, will leave a persistent, translucent mark on paper.