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Unformatted text preview: Biuret test turned a color not resembling blue or purple. No protein was present Iodine test turned orange. No starch present *we had to do another positive control using glucose and albumin mixed into the biuret solution to test whether there was proteins present in the solution. The color was first purple but after the 20 minutes in the water bath, the color turned orange. Meaning the presence of the glucose obscured the presence of the albumin. Exercise 2 Object: piece of wood (pine) Initial volume: 450mL Mass of the piece of pine wood: 26.75g Volume with the piece of pine submerged: 500mL Density= 26.75g/500mL= .0535 g/mL 3...
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- Spring '11