Photometric Determination of Boron in Titanium and its Alloys

Abstract

Dehydroascorbic acid, p-benzoquinone, anthraquinone disulfonie acid, and chloranil gave strong responses. The fact that vitamin K3 catalyzes the reaction makes it probable that vitamins Ki and K3, which also contain a naphthaquinone nucleus, would function in this manner.Sodium dehydrotartrate showed no catalytic effect despite the fact that it is a 1,2-diketone.The sensitive detectability of 1,2-diketones and quiñones, through their catalytic activity in the formaldehyde-1,2dinitrobenzene system, makes possible new tests for anthracene, phenanthrene, and inositol, because these compounds are easily converted into corresponding catalytically active compounds. DETECTION OF ANTHRACENE AND PHENANTHRENEAnthracene and phenanthrene are converted into anthraquinone and phenanthraquinone, respectively, by evaporation with concentrated nitric acid. These products react satisfactorily wdth the reagent mixture, if the reagent is precipitated in a surface-rich form from its benzene solution by evaporation of the solvent.

Determination of Boron in Titanium Alloys by Ion Exchange Method

“…Presence of the complex makes the end point determination of the subsequent water titration uncertain. Because excess peroxide will interfere with the wrater titration, both the peroxide and titanium-peroxide complex are destroyed by prolonged heating with a ferrous catalyst (2).…”

Sensitivities and Other Properties of Reagents for the Spectrophotometric Determination of Boron.

“…Absorptivity stated in numerical terms in reference cited. 4 Absorptivity estimated from calibration or absorbance curves in reference cited. " Data obtained on filter photometer; all other data obtained on spectrophotometers.…”

“…The fuel and average irradiation time of 120 minutes are the same for all runs except run 1-11, in which the fuel was changed. The concentration values given are the peak concentrations obtained after irradiations of 3 to 4 hours.…”

Light Absorption Spectrometry

“…In determining magnesium with titan yellow, the interference caused by manganese-(II), copper(II), iron(III), and aluminum can be prevented by adding potassium cyanide and hydroxylamine (78).…”