caa a22 4500 465748651 CHVBK 20180323111827.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00323019 doi (NATIONALLICENCE)springer-10.1007/BF00323019 Trace metal assay of thorium oxide by atomic emission spectrometry [Elektronische Daten] [N. Porwal, A. Argekar, P. Purohit, A. Page, M. Sastry] Summary: An Atomic Emission Spectrometric (AES) method has been developed for the direct determination of twenty-two metallic elements at trace concentrations in thorium oxide. The method is based on the use of a d.c. arc — carrier distillation technique with 12% composition of a mixed carrier, viz. AgCl+SrF2 in 5:1 proportion, and is equally applicable to both volatile and refractory analytes. A direct reading emission spectrometer with computerised data acquisition and processing facility has been used in these studies. The standardisation procedure includes study of volatilisation/excitation characteristics of the analyte elements to optimise choice and proportion of the carrier and signal integration time apart from optimisation of other experimental parameters such as arc current, viewing position of the arc plasma, sample charge etc. The detection limits for the analytes lie in the range 0.1-50 ppm while the precision of determinations is better than 15% for most of the elements as evaluated from the repetitive analyses of spiked samples. Springer-Verlag, 1990 Porwal N. Radiochemistry Division, Bhabha Atomic Research Centre, 400 085, Trombay, Bombay, India aut Argekar A. Radiochemistry Division, Bhabha Atomic Research Centre, 400 085, Trombay, Bombay, India aut Purohit P. Radiochemistry Division, Bhabha Atomic Research Centre, 400 085, Trombay, Bombay, India aut Page A. Radiochemistry Division, Bhabha Atomic Research Centre, 400 085, Trombay, Bombay, India aut Sastry M. Radiochemistry Division, Bhabha Atomic Research Centre, 400 085, Trombay, Bombay, India aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/3(1990-01-01), 255-258 0937-0633 338:3<255 1990 338 216 https://doi.org/10.1007/BF00323019 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00323019 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Porwal N. Radiochemistry Division, Bhabha Atomic Research Centre, 400 085, Trombay, Bombay, India aut NATIONALLICENCE 700 1- Argekar A. Radiochemistry Division, Bhabha Atomic Research Centre, 400 085, Trombay, Bombay, India aut NATIONALLICENCE 700 1- Purohit P. Radiochemistry Division, Bhabha Atomic Research Centre, 400 085, Trombay, Bombay, India aut NATIONALLICENCE 700 1- Page A. Radiochemistry Division, Bhabha Atomic Research Centre, 400 085, Trombay, Bombay, India aut NATIONALLICENCE 700 1- Sastry M. Radiochemistry Division, Bhabha Atomic Research Centre, 400 085, Trombay, Bombay, India aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/3(1990-01-01), 255-258 0937-0633 338:3<255 1990 338 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer