Tests Flashcards
Blood stains - Chemical Examinations
Saline extract + Ammonia, Benzidine Test, Guaiacum Test (Van Deen’s Dyas’ or Schombein Test), Phenolphthalein Test (Kastle-Mayer Test), Leucomalachite Green Test
Blood stains - Microscopic Examination
Hemochromogen crystal or Takayama Test, Teichmann’s blood crystals or Hemin crystals test, Acetone-haemin of Wagenhaar test
Blood stains - Spectroscopic Examinations
From fresh blood stains (oxyhemoglobin), from older stains (methemoglobin)
Blood stains - Biological Examination
Precipitin Test, Blood Grouping
This test is positive to any substance with hemoglobin:
Takayama test (hemochromogen crystal test)
Best of the microchemical/microscopic tests:
Teichmann’s blood crystals test
Determines whether BLOOD or SEMEN is of human origin:
Precipitin Test
Ligature is applied around the base of finger with moderate tightness. In a living person, there appears a bloodless zone. On a dead person, no change in color
Magnus test
Injection of a solution of fluorescein SQ. if circulation is present, dye will spread all over the body and the skin will have greenish-yellow discoloration
Icard’s test
The fingers are spread wide and the finger webs are viewed through strong light. In the living, the finger webs appear red but yellow in dead
Diaphanous test
There is no movt of the image formed by reflecting artificial light on the water or mercury contained in a saucer and placed on chest or abdomen if respiration is not taking place
Winslow test
Blood stains - Physical Tests
Solubility Test, Heat Test, Luminiscence Test
Tests for the presence of Powder Residues on SKIN
Dermal Nitrate Test/Paraffin Test/Diphenylamine Test/Lung’s Test/Gonzales’ Test
Test for the presence of Powder Residues on CLOTHING
Walker’s Test
Quick, sensitive and employs equipment within economic means. It can detect the presence of barium, antimony and lead
Flameless Atomic Absorption Spectroscopy (FAAS)
Quantitative determination of the chloride content of the blood in the right and left ventricle of the heart
Gettler’s Test (difference of at least 25mg proves drowning is the cause of death)
Presumptive test for presence of seminal fluid
Florence Test
Specific for spermatic fluid
Berberio’s Test
Conclusive of the presence of the presence of semen
Acid Phosphatase Test
Test whether semen is of human origin or not
Precipitin Test/Biological Test of Farnum
Test to determine whether respiration took place on a newborn child before death (lungs float in water)
Fodere’s Test/Hydrostatic Test/Static Test
Dip stomach in water, if it floats and air bubbles liberated to the surface of water, breathing has taken place
Stomach Bowel Test/Floatation Test/Breslau’s Test
Disappearance of the gelatinous embryonic connective tissue in the middle ear is a sign of birth
Wredin’s Test
Very reliable and characteristic of seminal fluid
Puramen Reaction
