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Forensic identification of dyes in ballpoint pen inks using LC-ESI-MSстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 19 декабря 2017 г.
- Авторы: Ахмерова Д.И., Крылова А., Ставрианиди А.Н., Шпигун О.А., Родин И.А.
- Журнал: Chromatographia
- Том: 80
- Номер: 11
- Год издания: 2017
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 1701
- Последняя страница: 1709
- DOI: 10.1007/s10337-017-3404-1
- Аннотация: The aim of this work was to develop new technique using flow injection analysis combined with LC-ESI-MS which allow identification of dyes in ballpoint pen inks. Sample preparation procedure for dyes extraction from ballpoint pen strokes has been developed. Characteristic group of ions for each sample of 21 studied ballpoint pen inks corresponding to the present dyes has been determined using flow injection method. LC separation conditions for identified dyes has been optimized on reversed- phase sorbent based on silica gel. The best composition of the mobile phase for the dyes mixture LC separation was 0.1% aqueous formic acid and acetonitrile. Dyes detection was carried out using mass spectrometry with electrospray ionization in positive and negative modes after reversed phase liquid chromatography separation. Dye composition of ink was additionally confirmed comparing the data obtained from literature. Flow injection analysis allows to obtain intensive ions of unknown strokes. It is difficult to get this information using only chromatographic methods, because dyes peak intensity can be low and noise of basic line high. Flow injection method allows to distinguish analyzed 21 ballpoint pens by determining characteristic set of dyes. Developed flow injection technique is very simple and quick. As a result, novel approach for the identification of dyes in the ballpoint pen inks by flow injection analysis with LC-ESI-MS and UV-detection without using standard dye samples has been established. It can be effective alternative to the existing LC-DAD-MS and IR- spectroscopy methods.
- Добавил в систему: Родин Игорь Александрович