HEXAGON OBTI

HEXAGON OBTI is the perfect complement to BLUESTAR® FORENSIC. This rapid screening test verifies that a bloodstain is of human origin. This helps the investigator to choose to collect or not a sample as evidence. A positive result indicates a strong likelihood for the presence of human blood. A lab analysis will later confirm or infirm this presumption.

What is it?

HEXAGON OBTI is a two-part test : a collection tube for the blood sample, and a test bar.

A sample of the presumed human blood trace is transferred into the tube with transport medium. This mixture is added drop by drop to the test. A positive sample is typically detected within 2-3 minutes.

A single blue line means the testing liquid is working fine but no human blood has been detected, two blue lines mean the test has detected human blood. 

Principle

Human hemoglobin (hHb) in the sample reacts with a reagent consisting of blue colored particles and monoclonal anti-human Hb antibodies. The immunocomplex migrates to the test zone where it is captured by an immobilized second antibody directed against hHb forming a blue test line to indicate a positive result. Unreacted reagents migrate further and are bound in a second line by immobilized anti-mouse lgC antibodies. This control line indicates proper function and correct handling of the test.

The test detects whole blood up to a dilution of 1 : 1,000,000. As little as 500 red cells are required for a positive result.

More information and documentation

Studies, reports, user's manual, and MSDS are available for download in the documentation section.

For the proper interpretation of the results, please read the Hochmeister's report available in the documentation section.

Testimonial

Craig Davidson, of the Davidson Law Firm, LLC, Baton Rouge, LA, USA used HEXAGON OBTI to verify the présence of blood in the black stains on a helmet that pertained to a WW II german soldier. See his step-by-step explanations with pictures.

Ordering HEXAGON OBTI

Box of 24 tests. Order code # HU-829
Each box includes 24 collection tubes and 24 tests.

Box of 6 tests. Order code # HU-830
Each box includes 6 collection tubes and 6 tests.

For all orders, please check first our list of distributors.