The Phenophthalein (solution) test for blood is so sensitive it can detect 1 part blood diluted in 5,000,000 parts water.
Salivary secretions may be used in place of blood for type determination under certain conditions.
| SEROLOGY (BLOOD WORK) The Phenophthalein (solution) test for blood is so sensitive it can detect 1 part blood diluted in 5,000,000 parts water. Salivary secretions may be used in place of blood for type determination under certain conditions. |