Methods+of+Blood+Detection+Outline+CK


 * Blood Detection By Chemical Methods**

There are three classes of methods

1.) Crystal Test: when haem forms crystals after reacting with particular reagants, with the most common reagant being pyridine. It forms in pink crystals.

2.)Catalytic Test: These depend on the fact that haem can speed up the decomposition of hydrogen peroxide. As it breaks down, it is oxidized, which causes a clolor change. There are other things besides blood that can prompt a color change, which will render a positive result.

3.) Instrumental Method: Haemoglobin can be detected by chromotography. These types of tests are used for a few different purposes. They are: -the confirmation of visible stains -the detection of non-visible stains -the enhancement of hard to see stains


 * Introduction**

-deciding if a stain is blood or not is surprisingly difficult -through the years, it has been reduced to chemical methods, so biological methods are not considered


 * All methods are dependent on the presence of hemoglobin**