AN INVESTIGATION OF THE BENZOIN METHOD FOR THE FLUORIMETRIC DETERMINATION OF BORON
The development of the boron -benzoin fluorescence at microgram concentrations of boron was investigated; a simple, but sensitive, fluorimeter was used. The development and decay of fluorescence intensity with time were observed in various solvents in the presence of different basic compounds. The fluorescence produced when formamide and its N-derivatives are used as the solvent media is stronger than that found when ethanol is used. A glycine buffer solution of pH 12.8 is effective in producing the correct conditions for developing fluorescence with ethanol as solvent, but is not effective in the formamide series of solvents. Isopropylamine and isobutylamine are effective bases in both ethanol and the formamide series. For a series of solvents of a given chemical type, e.g., the formamides, there may be an increase in fluorescence intensity with dielectric constant, although this is not true for the alcohols. Oxygen has a pronounced inhibiting action on the development of fluorescence in ethanol, but has much less effect in formamide. There is a linear relationship between fluorescence intensity and amount of boron present in the range studied (0.05 to 0.5 - g). (auth)
- Research Organization:
- Radley Industrial Research and Development Labs., Reading, Berks, Eng.
- NSA Number:
- NSA-15-008699
- OSTI ID:
- 4104713
- Journal Information:
- Analyst, Vol. Vol: 86; Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ACIDITY
ALCOHOLS
ALUMINUM
AMIDES
AMINES
AMINO ACIDS
BETA SPECTROMETERS
BORON
BREMSSTRAHLUNG
BUTYL RADICALS
DIELECTRICS
ELECTRONS
ENERGY
ERRORS
ETHANOL
FLUORESCENCE
FORMIC ACID
GLYCINE
MAGNETIC FIELDS
MEASURED VALUES
MEV RANGE
OXYGEN
PHOTOMETRY
PRODUCTION
PROPYL RADICALS
QUANTITATIVE ANALYSIS
SOLUTIONS
SOLVENTS
SPECTRA