outlie+WG

Chrystal Test:

• Use heam to turn the blood into crystals. The most accurate test is to use a reagent called pyridine, which shows up as pink crystals.

Catalytic Test:

• It needs the heam to catalyze the breakdown of hydrogen peroxide.

• The hydrogen peroxide breaks down, which allows another substance to oxidize

• This test is not as accurate as the others because a test can show positive, but it cannot be blood. The heam can react positive with plants, animal blood and metals.

Instrumental Methods:

• Chromatography can help identify the presence of heamoglobin. It helps with the deeper and more difficult stains, which are the stains that are shown faintly in blood. • It can help you find who the blood belongs to more precisely.