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    In this study, author presented a color-crystal test, to confirm the presence of blood stain. In this test, blue colored micro-crystals were observed in case of positive blood sample. Since author included same reagents used for primary benzidine color test, hence in positive samples, used reagent impart blue color to the crystals and aid in proper visibility to the developed micro-crystals, observed under 20x and 40x magnification. Copyright © 2022 Elsevier B.V. All rights reserved.


    Hemraj Verma. Benzidine color-crystal test; modified test to confirm the presence of blood stain. Forensic science international. 2022 Jun;335:111313

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    PMID: 35595327

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