High-Speed Fluorescence Detection of Explosives-like Vapors

2000 ◽  
Vol 72 (9) ◽  
pp. 1947-1955 ◽  
Author(s):  
Keith J. Albert ◽  
David R. Walt
Keyword(s):  
Fluorescence Detection ◽  
High Speed ◽  
Detection Of Explosives

High-speed fluorescence detection of explosives vapor

1999 ◽  
Author(s):  
Keith J. Albert ◽  
Michael L. Myrick ◽  
Steve B. Brown ◽  
Fred P. Milanovich ◽  
David R. Walt
Keyword(s):  
Fluorescence Detection ◽  
High Speed ◽  
Detection Of Explosives

Determination of Aflatoxins and Ochratoxin A in Traditional Turkish Concentrated Fruit Juice Products by Multi-Immunoaffinity Column Cleanup and LC Fluorescence Detection: Single-Laboratory Validation

2018 ◽  
Vol 101 (6) ◽  
pp. 1839-1849 ◽  
Author(s):  
Tugrul Kaymak ◽  
Levent Türker ◽  
Hüseyin Tulay ◽  
Joerg Stroka
Keyword(s):  
Ochratoxin A ◽  
Fluorescence Detection ◽  
High Speed ◽  
Grape Juice ◽  
Reversed Phase ◽  
Official Method ◽  
Immunoaffinity Column ◽  
Method Performance ◽  
Sample Extract ◽  
Single Laboratory

Abstract Background: Pekmez and pestil are traditional Turkish foods made from concentrated grape juice, which can be contaminated with mycotoxins such as aflatoxins and ochratoxin A (OTA). Objective: To carry out a single-laboratory validation of a method to simultaneously determine aflatoxins B1, B2, G1, and G2 and ochratoxin A in pekmez and pestil. Methods: The homogenized sample is extracted with methanol–water (80 + 20) using a high-speed blender. The (sample) extract is filtered, diluted with phosphate-buffered saline solution, and applied to a multi-immunoaffinity column (AFLAOCHRA PREP®). Aflatoxins and ochratoxin A are removed with (neat) methanol and then directly analyzed by reversed-phase LC with fluorescence detection using post-column bromination (Kobra cell®). Results: Test portions of blank pekmez and pestil were spiked with a mixture of aflatoxins and ochratoxin A to give levels ranging from 2.6 to 10.4 μg/kg and 1.0–4.0 μg/kg, respectively. Recoveries for total aflatoxins and ochratoxin A ranged from 84 to 106% and 80–97%, respectively, for spiked samples. Based on results for spiked pekmez and pestil (30 replicates each at three levels), the repeatability RSD ranged from 1.6 to 12% and 2.7–11% for total aflatoxins and ochratoxin A, respectively. Conclusions: The method performance in terms of recovery, repeatability, and detection limits has been demonstrated to be suitable for use as an Official Method. Highlights: First immunoaffinity column method validated for simultaneous analysis of aflatoxins and ochratoxin A in pekmez and pestil. Suitability for use for official purposes in Turkey, demonstrated by single-laboratory validation. Co-occurrence of aflatoxins and OTA in mulberry and carob pekmez reported for the first time.

scholarly journals High-Speed DNA Sequencing: An Approach Based Upon Fluorescence Detection of Single Molecules

1989 ◽  
Vol 7 (2) ◽  
pp. 301-309 ◽  
Author(s):  
James H. Jett ◽  
Richard A. Keller ◽  
John C. Martin ◽  
Babetta L. Marrone ◽  
Robert K. Moyzis ◽  
...  
Keyword(s):  
Dna Sequencing ◽  
Fluorescence Detection ◽  
High Speed ◽  
Single Molecules

scholarly journals Tandem copper and gold nanoclusters for two-color ratiometric explosives detection

The Analyst ◽  
2018 ◽  
Vol 143 (5) ◽  
pp. 1036-1041 ◽  
Author(s):  
Jeremy B. Essner ◽  
Xi Chen ◽  
Troy D. Wood ◽  
Gary A. Baker
Keyword(s):  
Fluorescence Detection ◽  
Gold Nanoclusters ◽  
Explosives Detection ◽  
Metal Nanoclusters ◽  
Ratiometric Fluorescence ◽  
Copper Metal ◽  
Dual Emission ◽  
Detection Of Explosives

A dual-emission platform comprising discrete gold and copper metal nanoclusters is introduced for the ratiometric fluorescence detection of explosives.

Supercritical-Fluid Chromatography On-Chip with Two-Photon-Excited-Fluorescence Detection for High-Speed Chiral Separations

2019 ◽  
Vol 91 (9) ◽  
pp. 6134-6140 ◽  
Author(s):  
Josef J. Heiland ◽  
David Geissler ◽  
Sebastian K. Piendl ◽  
Rico Warias ◽  
Detlev Belder
Keyword(s):  
Supercritical Fluid ◽  
Fluorescence Detection ◽  
Supercritical Fluid Chromatography ◽  
High Speed ◽  
Chiral Separations ◽  
Two Photon ◽  
On Chip
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