تسجيل الدخول

تسجيل

OTHER TYPES OF CHROMATOGRAPHY

المؤلف:  Max M. Houck، Jay A. Siegel

المصدر:  Fundamentals of Forensic Science

الجزء والصفحة:  p538-539

2026-08-26

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OTHER TYPES OF CHROMATOGRAPHY

Both gas chromatography and liquid chromatography have been successfully employed in the analysis and comparison of inks. Their advantage over TLC is that they yield quantitative as well as qualitative data and they are both generally more sensitive than TLC, which means that they require fewer plugs of ink. In addition, GC-MS is often used, allowing identification of each of the components in the ink. Capillary electrophoresis has also been applied to ink analysis, although applications of ink analysis have been very limited thus far. Capillary electrophoresis is similar to HPLC but uses tiny columns for separation so that as little as one or two plugs may be used for analysis. This has great advantages in cases where the sample is very limited.

FIGURE 1 Thin-layer chromatography of inks. Lanes one and three are standard black, ballpoint pen inks. Lanes 2 and 4 are each different black inks.