High-sensitivity detection of biological amines using fast Hadamard transform CE coupled with photolytic optical gating

Kevin L. Braun, Suminda Hapuarachchi, Facundo M. Fernandez, Craig A Aspinwall

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Here, we report the first utilization of Hadamard transform CE (HTCE), a high-sensitivity, multiplexed CE technique, with photolytic optical gating sample injection of caged fluorescent labels for the detection of biologically important amines. Previous implementations of HTCE have relied upon photobleaching optical gating sample injection of fluorescent dyes. Photolysis of caged fluorescent labels reduces the fluorescence background, providing marked enhancements in sensitivity compared to photobleaching. Application of fast Hadamard transform CE (fHTCE) for fluorescein-based dyes yields a ten-fold higher sensitivity for photolytic injections compared to photobleaching injections, due primarily to the reduced fluorescent background provided by caged fluorescent dyes. Detection limits as low as 5 pM (ca. 19 molecules per injection event) were obtained with on-column LIF detection using fHTCE in less than 25 s, with the capacity for continuous, online separations. Detection limits for glutamate and aspartate below 150 pM (1-2 amol/ injection event) were obtained using photolytic sample injection, with separation efficiencies exceeding 1 × 106 plates/m and total multiplexed separation times as low as 8 s. These results strongly support the feasibility of this approach for high-sensitivity dynamic chemical monitoring applications.

Original languageEnglish (US)
Pages (from-to)3115-3121
Number of pages7
JournalElectrophoresis
Volume28
Issue number17
DOIs
StatePublished - Aug 2007

Fingerprint

Hadamard transforms
Photobleaching
Amines
Injections
Fluorescent Dyes
Labels
Photolysis
Fluorescein
Limit of Detection
Aspartic Acid
Glutamic Acid
Coloring Agents
Fluorescence
Molecules
Monitoring

Keywords

  • Biogenic amines
  • Fluorescene detection
  • Hadamard transformation
  • Multiplexed CE
  • Photolytic optical gating

ASJC Scopus subject areas

  • Clinical Biochemistry

Cite this

High-sensitivity detection of biological amines using fast Hadamard transform CE coupled with photolytic optical gating. / Braun, Kevin L.; Hapuarachchi, Suminda; Fernandez, Facundo M.; Aspinwall, Craig A.

In: Electrophoresis, Vol. 28, No. 17, 08.2007, p. 3115-3121.

Research output: Contribution to journalArticle

Braun, Kevin L. ; Hapuarachchi, Suminda ; Fernandez, Facundo M. ; Aspinwall, Craig A. / High-sensitivity detection of biological amines using fast Hadamard transform CE coupled with photolytic optical gating. In: Electrophoresis. 2007 ; Vol. 28, No. 17. pp. 3115-3121.
@article{f8f3300a104d429eb234867b6ae27e80,
title = "High-sensitivity detection of biological amines using fast Hadamard transform CE coupled with photolytic optical gating",
abstract = "Here, we report the first utilization of Hadamard transform CE (HTCE), a high-sensitivity, multiplexed CE technique, with photolytic optical gating sample injection of caged fluorescent labels for the detection of biologically important amines. Previous implementations of HTCE have relied upon photobleaching optical gating sample injection of fluorescent dyes. Photolysis of caged fluorescent labels reduces the fluorescence background, providing marked enhancements in sensitivity compared to photobleaching. Application of fast Hadamard transform CE (fHTCE) for fluorescein-based dyes yields a ten-fold higher sensitivity for photolytic injections compared to photobleaching injections, due primarily to the reduced fluorescent background provided by caged fluorescent dyes. Detection limits as low as 5 pM (ca. 19 molecules per injection event) were obtained with on-column LIF detection using fHTCE in less than 25 s, with the capacity for continuous, online separations. Detection limits for glutamate and aspartate below 150 pM (1-2 amol/ injection event) were obtained using photolytic sample injection, with separation efficiencies exceeding 1 × 106 plates/m and total multiplexed separation times as low as 8 s. These results strongly support the feasibility of this approach for high-sensitivity dynamic chemical monitoring applications.",
keywords = "Biogenic amines, Fluorescene detection, Hadamard transformation, Multiplexed CE, Photolytic optical gating",
author = "Braun, {Kevin L.} and Suminda Hapuarachchi and Fernandez, {Facundo M.} and Aspinwall, {Craig A}",
year = "2007",
month = "8",
doi = "10.1002/elps.200700087",
language = "English (US)",
volume = "28",
pages = "3115--3121",
journal = "Electrophoresis",
issn = "0173-0835",
publisher = "Wiley-VCH Verlag",
number = "17",

}

TY - JOUR

T1 - High-sensitivity detection of biological amines using fast Hadamard transform CE coupled with photolytic optical gating

AU - Braun, Kevin L.

AU - Hapuarachchi, Suminda

AU - Fernandez, Facundo M.

AU - Aspinwall, Craig A

PY - 2007/8

Y1 - 2007/8

N2 - Here, we report the first utilization of Hadamard transform CE (HTCE), a high-sensitivity, multiplexed CE technique, with photolytic optical gating sample injection of caged fluorescent labels for the detection of biologically important amines. Previous implementations of HTCE have relied upon photobleaching optical gating sample injection of fluorescent dyes. Photolysis of caged fluorescent labels reduces the fluorescence background, providing marked enhancements in sensitivity compared to photobleaching. Application of fast Hadamard transform CE (fHTCE) for fluorescein-based dyes yields a ten-fold higher sensitivity for photolytic injections compared to photobleaching injections, due primarily to the reduced fluorescent background provided by caged fluorescent dyes. Detection limits as low as 5 pM (ca. 19 molecules per injection event) were obtained with on-column LIF detection using fHTCE in less than 25 s, with the capacity for continuous, online separations. Detection limits for glutamate and aspartate below 150 pM (1-2 amol/ injection event) were obtained using photolytic sample injection, with separation efficiencies exceeding 1 × 106 plates/m and total multiplexed separation times as low as 8 s. These results strongly support the feasibility of this approach for high-sensitivity dynamic chemical monitoring applications.

AB - Here, we report the first utilization of Hadamard transform CE (HTCE), a high-sensitivity, multiplexed CE technique, with photolytic optical gating sample injection of caged fluorescent labels for the detection of biologically important amines. Previous implementations of HTCE have relied upon photobleaching optical gating sample injection of fluorescent dyes. Photolysis of caged fluorescent labels reduces the fluorescence background, providing marked enhancements in sensitivity compared to photobleaching. Application of fast Hadamard transform CE (fHTCE) for fluorescein-based dyes yields a ten-fold higher sensitivity for photolytic injections compared to photobleaching injections, due primarily to the reduced fluorescent background provided by caged fluorescent dyes. Detection limits as low as 5 pM (ca. 19 molecules per injection event) were obtained with on-column LIF detection using fHTCE in less than 25 s, with the capacity for continuous, online separations. Detection limits for glutamate and aspartate below 150 pM (1-2 amol/ injection event) were obtained using photolytic sample injection, with separation efficiencies exceeding 1 × 106 plates/m and total multiplexed separation times as low as 8 s. These results strongly support the feasibility of this approach for high-sensitivity dynamic chemical monitoring applications.

KW - Biogenic amines

KW - Fluorescene detection

KW - Hadamard transformation

KW - Multiplexed CE

KW - Photolytic optical gating

UR - http://www.scopus.com/inward/record.url?scp=34548735418&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34548735418&partnerID=8YFLogxK

U2 - 10.1002/elps.200700087

DO - 10.1002/elps.200700087

M3 - Article

C2 - 17674422

AN - SCOPUS:34548735418

VL - 28

SP - 3115

EP - 3121

JO - Electrophoresis

JF - Electrophoresis

SN - 0173-0835

IS - 17

ER -