Application of high-resolution x-ray spectrometry to activation analysis

A method is described for the nondestructive determination of bromine in blood serum by INAA followed by X-ray spectrometry. The use of magnetic fields for the elimination of the particles emitted by the blood matrix reduces the background and makes possible the accurate measurement of the bromine X-rays. An average value of 7.38 f 0.44 mg Br/L blood serum was obtained for the single person tested.

Section: Resultsmentioning

confidence: 99%

“…The application of neutron activation to the determination of trace amounts of elements has been a standard technique for many years. Recently Mantel et al (1) substituted high resolution X-ray spectrometry for the generally used 7-ray spectroscopy and listed the elements which may be detected as well as the sensitivities obtainable (1).…”

mentioning

confidence: 99%

Determination of bromine in blood serum by neutron activation analysis and x-ray spectrometry

Rapaport¹,

Mantel²,

Nothmann³

1979

“…It was claimed (64) that characteristic X-rays are better than gammarays for measuring the elements in neutron activation analysis. Examples are shown for Ir, Os, Pt, Rb, Cs, Ag, Nb, Zr, and phosphate rock.…”

Section: Parametersmentioning

confidence: 99%

X-ray absorption and emission

Birks¹,

Gilfrich²

1974

To reiterate the point of view expressed in the 1972 review, it is not our intent merely to report everything that has happened; neither is it our intent to itemize every instance of progress (ideally all publications should represent progress but unfortunately they do not because of hasty submission of partly finished work (1) or careless review of manuscripts). Rather, the intent here is to select areas of significant advances in X-ray theory or practice and to attempt to show what these advances consist of. It is our opinion that the significant advances of the past two years have come about by adding together small items of progress rather than by spectacular quantum jumps in instrumentation or techniques.Again to reiterate the caveat lector of the 1972 review, the selection of topics for discussion is unquestionally subjective to some extent, and only future progress will demonstrate whether or not the items covered herein are the most significant. HISTORICAL NOTEA most fascinating look backward at the early history of X-ray spectroscopy is provided by the book, "Moseley and the Numbering of the Elements" by Jaffe (2). The book reads almost like a novel as it traces the story of the people as well as the interlocking events that took place in atomic theory in the early 1900's. It makes the reader appreciate the experimental ingenuity as well as the searching intellects which prevailed during those challenging years following the discovery of X-rays in 1895 until Moseley's experiments in 1913. Contributions by giants such as J.

“…X-Ray excited X-ray fluorescence has been the subject of study at two national laboratories; LBL has completed an impressive package for trace element determination, particularly in air particulate filters, biological and geological specimens (34), while ORNL devised an original monochromator, that improves analytical sensitivity by reducing the "white" X-radiation originating in the tube (117). Finally, it is perhaps ironic that-after developing the gamma-spectrometry methods that are presently so useful to X-ray workers-activation analysts are only now themselves beginning to recognize the usefulness of X-ray spectrometry in their own field (70,76). Other Methods.…”

Section: Nuclear and Atomic Activation Analysismentioning

confidence: 99%

Nucleonics

Lyon¹,

Ricci²,

Ross³

1974

The maturation of a field is often presaged by a decline in innovative papers and confirmed by an increase in textbooks and reviews.During the past two years, the decline in number of good papers has become precipitous; concurrently, the quantity and quality of books, reviews, and bibliographies has greatly increased. In previous Nucleonics reports, we attempted to set up (somewhat arbitrarily) specific criteria for selecting publications to be included in the written text. Our basic guide was that a paper should exhibit something new or unusual in the conceptual sense. Clearly, a large number of excellent articles on applied analytical procedures were thus eliminated, but the policy did serve