Serious interference of dissolved organic compounds in the laser induced fluorimetric determination of uranium in water: a selective & sensitive method for the laser induced fluorimetric determination of uranium in water

2020 ◽  
Vol 12 (6) ◽  
pp. 830-838
Author(s):  
P. K. Tarafder ◽  
R. K. Mondal ◽  
G. Chakrapani
Keyword(s):  
Organic Compounds ◽  
Waste Waters ◽  
Fluorimetric Determination ◽  
Negative Interference ◽  
Dissolved Organic Compounds ◽  
Sensitive Method

In this report, serious negative interference of Dissolved Organic Compounds (DOCs) in the laser/LED fluorimetric determination of uranium in natural and waste waters has been amply demonstrated.

Fluorimetric Determination of Anatoxin M1 in Cheese

1987 ◽  
Vol 70 (3) ◽  
pp. 472-475
Author(s):  
Jan P Bijl ◽  
Carlos H Van Peteghem ◽  
Diana A Dekeyser
Keyword(s):  
Liquid Chromatography ◽  
Final Analysis ◽  
Fluorimetric Determination ◽  
Reverse Phase ◽  
Cheese Sample ◽  
Acetone Water ◽  
Silica Cartridge ◽  
Layer Chromatography ◽  
Sensitive Method

Abstract A simple and sensitive method is proposed for the determination of aflatoxin M, in cheese. The ground cheese sample is extracted with acetone-water (3 + 1). Acetone is evaporated under vacuum, and the aqueous phase is passed through a C18 disposable cartridge. After the cartridge is washed with acetonitrile-water (1 + 9), the toxin is eluted with acetonitrile. The extract is then cleaned up on a silica cartridge. Final analysis is performed by 2-dimensional thin layer chromatography (TLC) combined with fluorodensitometry or by liquid chromatography on a reverse phase C„ column with fluorescence detection. Recovery is greater than 90%, and the coefficient of variation is 6% or less. The detection limit is in the range of 10 ng/kg. The identity of aflatoxin M2, is confirmed by formation of the Mu or acetyl-M1, derivative and rechromatography.

Multivariate optimization of a simple and sensitive method for the determination of secondary biogenic organic compounds in airborne particles

2016 ◽  
Vol 8 (20) ◽  
pp. 4047-4055 ◽  
Author(s):  
Athanasia I. Mologousi ◽  
Evangelos B. Bakeas
Keyword(s):  
Organic Compounds ◽  
Secondary Organic Aerosol ◽  
Organic Aerosol ◽  
Airborne Particles ◽  
Multivariate Optimization ◽  
Sensitive Method

In this study, a simple and sensitive method for the determination of biogenic secondary organic aerosol (SOA) in airborne particles, has been optimized and validated.

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