skip navigation


Register for Latest Research

Stay Informed
Register with NCJRS to receive NCJRS's biweekly e-newsletter JUSTINFO and additional periodic emails from NCJRS and the NCJRS federal sponsors that highlight the latest research published or sponsored by the Office of Justice Programs.

NCJRS Abstract

The document referenced below is part of the NCJRS Virtual Library collection. To conduct further searches of the collection, visit the Virtual Library. See the Obtain Documents page for direction on how to access resources online, via mail, through interlibrary loans, or in a local library.


NCJ Number: 82937 Find in a Library
Title: High Performance Thin Layer Chromatography and the Study of Inks
Journal: International Criminal Police Review  Volume:36  Issue:350  Dated:(August/September 1981)  Pages:186-193
Author(s): J L Clement; P F Ceccaldi
Date Published: 1981
Page Count: 6
Format: Article
Language: English
Country: France
Annotation: The procedures and benefits of high performance thin layer chromatography (HPTLC) in studying inks in criminal investigations are discussed.
Abstract: HPTLC uses plates made from silica or special plates known as concentration zone plates. The concentration zone plates are made by covering a glass or plastic support with a layer of an inactive and very absorbant substance such as Kieselguhr or synthetic silicon dioxide with large pores. The inactive layer slows down the initial movement of the sample under study and concentrates the sample, and the active layer separates the constituents of the sample. The results provided by HPTLC are comparable to those of liquid chromatography, while it has the advantage of requiring only small amounts of the sample substance (which would be insufficient for liquid chromatography); however, only semiquantitative measures can be obtained with this technique, since it is impossible to determine exactly the mass of the ink contained in the sample. When two inks are compared, two ink strokes of similar size should be taken and dissolved in the same volume of eluent. The concentrations obtained, if not identical, will be easily compared. The slight difference between them will be indicated by a small shift of the curve in relation to the vertical coordinates, but their profiles will be similar. Overall, the method can be expected to improve examination techniques and provide increased precision in comparing inks. Photographic illustrations are provided, along with three bibliographic listings.
Index Term(s): Chromatography
To cite this abstract, use the following link:

*A link to the full-text document is provided whenever possible. For documents not available online, a link to the publisher's website is provided. Tell us how you use the NCJRS Library and Abstracts Database - send us your feedback.