Investigators may prefer to use a combination of Phenolphthalein and Leucocrystal Violet Presumptive Blood Tests to indicate the presumptive presence of blood. Phenolphthalein is one of the most commonly used chemicals in the field and forensics laboratory to indicate the presence of blood. Leucocrystal Violet tests is highly sensitive and often used after a phenolphthalein blood test to confirm that a suspected stain in fact presumptively may be blood and should be collected for confirmatory testing.
Our Phenolphthalein and Leucocrystal Violet Combination Presumptive Blood Test Kit is packaged in a durable, lightweight plastic box for easy and safe transport from one crime scene to another. It includes all the premixed chemicals and supplies required to conduct both the Phenolphthalein and Leucocrystal Violet presumptive blood tests. All of the reagents are supplied in plastic dropper bottles for easy use. The kit also includes Known Bloodstain Controls to ensure that the test results are accurate. All kit components are also available to reorder individually as needed.
Using our Phenolphthalein and Leucocrystal Violet Blood Tests is quick and simple. Each test is administered by first collecting a positive control using the supplied Know Bloodstain Control. Next, a sample of the suspected stain should be collected using either a piece of filter paper or a cotton-tipped swab. One drop of each of the reagents is then applied to the collected sample in the order defined in the directions. The results will be indicated by a specific color change, depending on the reagent used for testing.
Plastic Kit Box, 10.5"L x 7" W x 2.25" H
Alcohol Reagent 1.5 oz Dropper Bottle
Phenolphthalein Reagent 1.5 oz Dropper Bottle
Hydrogen Peroxide Reagent 1.5 oz Dropper Bottle (2 per kit)
Leucocrystal Violet Reagent 1.5 oz Dropper Bottle
Distilled Water 1.5 oz Dropper Bottle (2 per kit)
Box of Filter Paper
Box of 3 Cotton-Tipped Swabs
Known Bloodstain Control (2 per kit)
Kit Instructions Affixed to Inside of the Box