Abstract
BULLETINS recently issued by Messrs. Adam Hilger, Ltd., give particulars of recent advances in methods of spectrographic analysis and in apparatus. The first, No. 168, describes a method of analysis originated by Judd Lewis (Chemistry and Industry, 51, 271-274? 1932) and a range of salts, mixtures called?ratio mixtures?? and solutions of high chemical purity under the name of?specpure substances?, for use in that scheme of analysis. The method, essentially, is for the determination of elements present in minute proportions, and it applies to all the metals, together with the non-metals silicon, boron, phosphorus, and arsenic. The major constituents having been determined by ordinary chemical analysis, each minor constituent is determined approxi mately as a ratio of one or other of the major constituents by comparison of the spectrograms of the sample containing the metals in the form of sulphates with spectrograms of the specpure ratio mixtures. Finally, from the data thus obtained, the substance is synthesised by means of the ratio solutions, and a spectrographic comparison is made between the specimen and its synthesised counterpart.
Article PDF
Rights and permissions
About this article
Cite this article
Spectrographic Analysis. Nature 130, 174–175 (1932). https://doi.org/10.1038/130174b0
Issue Date:
DOI: https://doi.org/10.1038/130174b0