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Small particle reagent (SPR) method for detection of ...- biological washing powder fluorescent powder on fingerprints detergent powder ,Dec 01, 2016·A fluorescent cyano blue based SPR was recommended for developing latent fingerprints on multi-colored, wet, non porous surfaces. 22 A fluorescent SPR composition based on basic zinc carbonate and crystal violet in commercial liquid detergent was also proposed to develop latent fingerprints …Introduction Results & Discussionbrands in liquid, powder and gel forms. Most detergents are at least 60–70% water, and we see the water signal as a broad feature at ~3300 cm-1. This is present in different amounts in the three samples. The runny liquid sample has the most, while the dry powder sample has the least. There are also differences in the so-called Fingerprint



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