Counting Single Chromophore Molecules for Ultrasensitive Analysis and Separations on Microchip Devices
Separations of 15 pM rhodamine 6G and 30 pM rhodamine B performed in a micromachined electrophoresis channel were detected by counting fluorescence bursts from individual molecules. The migration times, peak widths, and analyte concentrations were estimated from the number and the migration time dis...
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Published in | Analytical chemistry (Washington) Vol. 70; no. 3; pp. 431 - 437 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Washington, DC
American Chemical Society
01.02.1998
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Subjects | |
Online Access | Get full text |
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Summary: | Separations of 15 pM rhodamine 6G and 30 pM rhodamine B performed in a micromachined electrophoresis channel were detected by counting fluorescence bursts from individual molecules. The migration times, peak widths, and analyte concentrations were estimated from the number and the migration time distribution of the detected molecules. Concentration detection limits estimated at >99% confidence were 1.7 pM rhodamine 6G and 8.5 pM rhodamine B. The separations required <35 s and the relative migration time uncertainties were less than 2.0%. These are the lowest detection limits reported for microchip separation devices and the first example of single-chromophore molecular counting for detection of chemical separations. |
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Bibliography: | ark:/67375/TPS-06RX8X9Z-5 istex:2AFC9416286A3DA7C5D3311C95B14C5915527997 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0003-2700 1520-6882 |
DOI: | 10.1021/ac9707242 |