Thin layer chromatography and in situ fluorometry for the quantitative determination of dimethoate and malathion in lettuce.
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Chromatography, Thin Layer↗
Biomedical subjects
R W Frei
Publications and source records attributed to R W Frei.
An investigation of fluorigenic labelling of chlorophenols with dansyl chloride.
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Chlorobenzenes↗
Determination of hydroxybiphenyls as dansyl derivatives.
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Animals↗
A quantitative assay for sennosides by fluorigenic derivatization on thin-layer chromatograms.
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Anthraquinones↗
A preliminary investigation of the high-speed liquid chromatography of some ergot alkaloids.
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Chromatography↗
Electron-donor-acceptor complexing reagents in the analysis of pesticides. VI. Influence of structure in detection and identification.
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Chromatography, Thin Layer↗
Quantitative analysis of 3-indoleacetic acid and serotonin by in situ fluorescence on thin-layer chromatograms.
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Chromatography, Thin Layer↗
The analysis of carbamate and urea herbicides by fluorimetry of their dansylated amine moieties.
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Amines↗
Electron donor-acceptor reagents in the analysis of pesticides. VII. A simple model system hydrolysis of some cardamate pesticides.
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Carbamates↗
Separation of polynuclear aza-heterocyclics by high-speed liquid chromatography on a chemically bonded stationary phase.
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Acridines↗
Separation of polynuclear aza-heterocyclics by high-pressure liquid chromatography using a silver-impregnated adsorbent.
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Acridines↗
Fluorigenic labelling of carbamates with dansyl chloride. IV. In situ quantitation of N-methyl carbamate insecticides on thin-layer chromatograms.
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Carbamates↗
Fluorigenic labelling of carbamates using dansyl chloride. 3. Thin-layer chromatographic properties of the derivatives.
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Adsorption↗
Fluorigenic labelling of carbamates using dansyl chloride. II. Fluorescence phenomena of the derivatives.
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1-Propanol↗
Characterization of indoles by thin-layer chromatography and in situ fluorometry.
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5-Hydroxytryptophan↗
Metallofluorescent indicators as spray reagents for the in situ determination of organophosphorus pesticides on thin-layer chromatograms.
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Chromatography, Thin Layer↗
Fluorigenic labeling of N-methyl- and N,N-dimethylcarbamates with 4-chloro-7-nitrobenzo-2,1,3-oxadiazole.
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Carbamates↗
Electron donor-acceptor complexing reagents for the detection of pesticides on TLC. II. Carbamates, anilides and ureas. Spray reagents, chromatography and instrumental techniques.
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Anilides↗