Schwarz Lothar
KT 41-2 Research, Development and Testing of Fingerprint Detection Methods, Kriminaltechnisches Institut des Bundeskriminalamts, 65173 Wiesbaden, Germany.
J Forensic Sci. 2009 Nov;54(6):1323-6. doi: 10.1111/j.1556-4029.2009.01168.x. Epub 2009 Oct 5.
Analytical standards are needed in latent fingerprint detection for research and development as well as for quality control in routine work because normal fingerprints are too varied for comparison studies and tests. One way is to create latent fingerprints. For the amino acid sensitive detection method this can be achieved by coating test items with an amino acid solution using a modified commercial office bubble jet printer. Besides low costs, fast and easy preparation, the main advantage of a bubble jet printer is that the amino acid loading per area on the test item can be calculated by weighing the cartridge on a balance. This opens the possibility to determine the deviation for every printing series. The reproducibility of prints in a printing series made by one cartridge has a deviation of 2-16% and of prints made by different cartridges 20-25%.
在潜在指纹检测中，无论是研发还是日常工作中的质量控制，都需要分析标准，因为正常指纹变化太多，无法用于比较研究和测试。一种方法是创建潜在指纹。对于氨基酸敏感检测方法，可以通过使用改良的商用办公喷墨打印机用氨基酸溶液涂覆测试物品来实现。除了成本低、制备快速简便外，喷墨打印机的主要优点是可以通过在天平上称量墨盒来计算测试物品上每单位面积的氨基酸负载量。这为确定每个打印系列的偏差提供了可能性。由一个墨盒制作的打印系列中指纹的再现性偏差为2-16%，由不同墨盒制作的指纹偏差为20-25%。
