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Review of recent developments of on-line sample stacking techniques and their application in capillary electrophoresis

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Chen Y., Lü W., Chen X., Teng M.

Open Chemistry

2012

vol. 10

issue 3

611-638

Capillary electrophoresis (CE) has become one of the most useful tools in separation science because of its high separation efficiency, low cost, versatility, ease of sample preparation and automation. However, some limitations of CE, such as poor concentration sensitivity due to its lower sample loading and shorter optical path length, limits its further applications in separation science. In order to solve this problem, various on-line sample preconcentration techniques such as transient isotachophoresis preconcentration, field-enhanced sample stacking, micelle to solvent stacking, micelle collapse, dynamic pH junction, sweeping, solid phase extraction, single drop microextraction and liquid phase microextraction have been combined with CE. Recent developments, applications and some variants together with different combinations of these techniques integrating in CE are reviewed here and our discussions will be confined to the past three years (2008–2011). [...]

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1 Open Chemistry

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1 Chen X.

1 Chen Y.

1 Lü W.

1 Teng M.

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Review of recent developments of on-line sample stacking techniques and their application in capillary electrophoresis