THE DETERMINATION OF MICROGRAM AND SUBMICROGRAM AMOUNTS OF BORON. II. THE SEPARATION OF BORON BY DISTILLATION AND THE EVAPORATION OF DISTILLATES

Journal Article · Sun Jun 01 00:00:00 EDT 1958 · Analytica Chimica Acta (Netherlands)

DOI:https://doi.org/10.1016/S0003-2670(00)87172-X· OSTI ID:4314951

Spicer, G S; Strickland, J D.H.

Methyl alcohol distillates containing mu g amounts of boron may be evaporated without loss of boron by first adding water. sodium hydroxide, and glycerol. The resulting residues can be used directly in the curcumin absorptiometric methods previously described. The distillation techniques developed over the last decade by the United Kingdom Atomic Energy authority are briefly described. as these can be used for the separation of boron from practically all types of sample, including organic matter after it has been ashed with lime. In all cases aqueous solutions of the samples are made slightly acid (pH 1.5 to 5) and evaporated nearly to dryness. Residues are then treated with methyl alcohol in one of three ways according to their properties. It is essential to use all-silica distillation apparatus and platinum dishes for collecting distillates. Notes are given of other precautions necessary to minimize contamination from reagents and other sources. The methods are rapid and suitable for routine analysis on up to 10 g of sample. Under favorable conditions, the limit of detection is of the order of 0.01 ppm of boron. A precision of better than 5% can be obtained with amounts exceeding about 0.2 ppm. (auth)

• Research Organization: U.K. Atomic Energy Authority, Research Group, Woolwich Outstation, London
• NSA Number: NSA-12-012257
• OSTI ID: 4314951
• Journal Information: Analytica Chimica Acta (Netherlands), Vol. Vol: 18; Other Information: Orig. Receipt Date: 31-DEC-58
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
ABSORPTION- ALCOHOLS- BORON- CHEMICALS- COMBUSTION- - COMPOUNDS- CURCUMIN- DISTILLATION- EVAPORATION- LOSSES- METHANOL- ORGANIC COMPOUNDS- QUALITATIVE ANALYSIS- QUANTITATIVE ANALYSIS- QUANTITY RATIO- RESIDUES- SEPARATION PROCESSES- SODIUM HYDROXIDES- TRACE AMOUNTS- USES- WATER
ACIDITY- CALCIUM HYDROXIDES- CONTAMINATION- DETECTION- ERRORS- LABORATORY EQUIPMENT- PLATINUM- SILICON COMPOUNDS- SOLUTIONS