Analytical Chemistry of Boron

Low concentrations of boron can be determined in water (0.4-0.6 mg dm ) by atomic absorption spectroscopy using nitrous oxide/acetylene flame (fuel rich) and measuring absorbance at 249.8 nm. [Pg.64]

The acid is so weak that it cannot be titrated against strong alkalis but in presence of organic compounds with 2 or more adjacent -COH groups, which form a complex with boric acid, the latter can be titrated with strong alkali. [Pg.64]

Weigh out accurately about 0.8 g of the purest acid and make up to 250 cm with water in a volumetric flask. Pipette 25.0 cm of the solution into a conical flask, dilute to 50 cm with water, add a few drops of phenolphthalein and 3.0 g mannitol. Titrate with standard O.I M NaOH until the first pale red colour is detected. Repeat to obtain concordant results and calculate from the average titre the concentration of the acid in mol dm [Pg.64]

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