2. Forensic Test A (Paper Chromatography)
Instructions (Part I): Follow the method demonstrated in the video below to analyze the ink from each suspect’s pen. Use a wooden stirring stick instead of a pencil. Make sure the filter paper touches the water, but the ink mark remains above the water level. Allow the paper chromatography analysis to run for 5 minutes.
Instructions (Part II): Carefully remove each piece of filter paper and label them “Suspect 1”, “Suspect 2”, and “Suspect 3” using your pencil. Place all the filter papers side by side and take a clear photo. Upload the image using the QR code provided below, and type your first name in the “Subject” area.
