| Summary: | Content removed due to copyright restrictions: Boswell, C. R., & Brooks, R. R. (1965). Improved Methods for the Measurement of Spectral Line Intensities. Applied Spectroscopy, 19(5), 147. Brooks, R. R., & Boswell, C. R. (1965). A comparison of cathode and anode excitation in the d.c. arc. Analytica Chimica Acta, 32(C), 339-345. Boswell, C. R., & Brooks, R. R. (1965). The extraction of elements with cyclic solvents and its application to geochemical analysis. Analytica Chimica Acta, 33(C), 117-122. Boswell, C. R., & Brooks, R. R. (1965). The application of discontinuous, countercurrent, liquid-liquid extraction to the study of the distribution of metal ions between hydrochloric acid and methyl isobutyl ketone. Mikrochimica Acta, 53(5-6), 814-821. A procedure conbining solvent extraction enrichment techniques and spectrographic analysis was developed for the quantitative determination of many trace elements in a wide range of silicate rocks and in a series of highly saline Antarctic lake waters. Since a great deal of the work depended on spectrographic analysis, an investigation was carried out to improve the precision and sensitivity of existing methods. An improved method for the determination of spectralline intensities was developed. This was based on the author's nodification of the partial Seidel function, referred to as B-functions. A conversion table for these is given. A scale calibrated in B-functions was incorporated into a Hilger microphotometer enabling such values to be obtained directly without the use of conversion tables. B-values can be plotted directly onto the linear ordinate of semilog paper if the self-calibration method is used for evaluating line intensities. This results in a straightening of the characteristic curve with an attendant time saving and an improvement in the accuracy of the background extrapolation. A nomographic technique was also developed for use in conjunction with this scale and resulted in a rapid evaluation of line intensities but with some loss in ...
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