Emission Spectrometric Method Research Articles

Format for the publication of emission spectrometric method of analysis

Format for the publication of emission spectrometric method of analysis

Format for the publication of emission spectrometric method of analysis

Format for the publication of emission spectrometric method of analysis

Quantitative spectrographic analysis of the rare earth elements—X: Determination of rare earth impurities commonly associated with purified thulium, ytterbium, lutetium and scandium

Emission-spectrometric methods are described for the following quantitative determinations: yttrium, holmium, erbium, ytterbium and lutetium in thulium; samarium, yttrium, erbium, thulium, lutetium and scandium in ytterbium; yttrium, thulium, ytterbium and lutetium in scandium. The basic method involves the d.c. carbon arc excitation of rare earth oxide-graphite mixtures. In all cases the percent deviation from the mean is less than ± 5 per cent.

Quantitative spectrographic analysis of the rare earth elements—IX: Determination of rare earth impurities commonly associated with purified samarium, gadolinium, terbium, and yttrium

Emission spectrometric methods are described for the following quantitative determinations: neodymium and gadolinium in samarium; neodymium, samarium, terbium, europium, yttrium, dysprosium and holmium in gadolinium; samarium, gadolinium, terbium, dysprosium, holmium, and erbium in yttrium; and samarium, gadolinium, yttrium and dysprosium in terbium. These methods cover the concentration range from the detection limit up to 1 per cent. The basic method involves the direct-current carbon arc excitation of rare earth oxide-graphite mixtures, utilizing the unique similarity in excitation behavior of many of the rare earths to provide a high degree of internal standardization. The coefficient of variation is less than ±5 per cent in all instances.

Emission Spectrometric Determination of Oxygen in Titanium and Titanium Alloys

An emission spectrometric method for the determination of O/sub 2/ in Ti and Ti alloys is based on the direct current carbon arc excitation of a special electrode assembly which provides a molten Ft bath after the arc is initiated. The O/sub 2/ in the Ti sample is rapidly liberated from this bath into an Ar atmosphere which supports the arc discharge. The intensity ratio of the line pair is related to the O/sub 2/ content of the Ti sample. This procedure provides O/sub 2/ determinations with a precision comparable to the vacuum fusion or bromination-reduction techniques, but has the advantage of greatly reduced time requirements. (auth)