This rapid screening test presumes 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. A sample of the presumed human blood trace is transferred into the tube with transport medium.

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Using the sample collection stick, collect the sample by running the sample collection stick across the bloodstain. Note: Since the collection stick is damp from the Hexagon OBTI reagent, dry blood will adhere to the collection stick.

Step 2 Replace the bottle cap on the Hexagon OBTI reagent bottle, tighten cap down to prevent leakage, and gently shake the reagent bottle for 5 seconds, then SNAP off the tip of the cap. Step 3 Place the Hexagon OBTI test cassette on a level surface, and squeeze out two drops of the reagent containing the suspected blood sample onto the test cassette sample tray.

Note: If time only allows for collection, samples may be stored at room temperature for up to 1 week, then tested later. Step 4 After 2 to 3 minutes a blue bar or blue bars will appear in the test results window.

Wait a full ten minutes for confirmation of results. One blue control bar indicates the test strip and reagent are functioning properly. To confirm negative results wait 10 minutes. NOTE: A False positives will result if the blood is from higher primates such as chimpanzees, monkeys, etc.

False positives may also result from ferret blood. For all your Hotel reservations for our Courses, please book via our website:. About us. Forensic Products. Alternate Light Sources.

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Item No. Interpretation of the Readout One blue control bar indicates the test strip and reagent are functioning properly. Shipping method. Delivery Time:. Reviews 0. Hexagon OBTI, blood confirmatory test, 24 pcs does not have any reviews yet. Share your experiences and post a review.

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Hexagon OBTI Blood Detection Tests

Stains of varying blood dilutions were subjected to each presumptive test and the results compared. The Hexagon OBTI buffer volume was also reduced to ascertain whether this increased the sensitivity of the kit. The study found that Hemastix R was the most sensitive test for trace blood detection. This site needs JavaScript to work properly. Please enable it to take advantage of the complete set of features! Clipboard, Search History, and several other advanced features are temporarily unavailable.


Comparison of Presumptive Blood Test Kits Including Hexagon OBTI

The testing of suspected human bloodstains at the crime scene using Hexagon OBTI is simple, straightforward, and takes 2 to 3 minutes. A sample of the questioned blood is transferred to the Hexagon OBTI reagent bottle, then two drops of the reagent are placed onto the test cassette. If the sample is human blood, two blue bars will appear in the test result window of the test cassette. A False positives will result if the blood is from higher primates such as chimpanzees, monkeys, etc.


Hexagon Obti Human Blood Test - 6 tests

This mixture is added drop by drop to the test. A positive sample is typically detected within minutes. The test detects whole blood up to a dilution of 1 : 2,, As little as red cells are required for a positive result.

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