RADIOISOTOPES

Choice of Optical Geometrical Conditions for Radioisotope X-Ray Fluorescence Analysis (I)

Dependence of Fluorescent X-Ray Intensity on Size and Position of Source and Sample

Yoshiko MATSUI, Tomihiko FURUTA

1973Volume 22Issue 9 Pages 485-491
Published: September 15, 1973
Released on J-STAGE: September 07, 2010

DOIhttps://doi.org/10.3769/radioisotopes.22.9_485

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For a purpose of obtaining the optical geometrical conditions for radioisotope X-ray fluorescence analysis, the dependence of the characteristic X-ray intensity on the position of the source and the sample was investigated in the case of various diameters of the source and the sample.
“Central source geometry”is suitable only for a small source (φ') and a relatively large sample diameter (φ) compared with the detector window diameter (ξ), i.e. φ'≤ and φ≥0.6ξ. In the other cases, “Side source geometry”is suitable.
In the case of a sufficiently large sample, it was eomfirmed that the variation of the X-ray intensity due to that of source-sample distance (D) is decreased by setting a source at a distance (Y) far from the detector in compensation for the intensity reduction.

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Studies on Dinonylnaphthalene Sulphonic Acid as Liquid Ion Exchanger for Radioactive Liquid Waste Disposal (Part 1)

Sung-Mao WANG, Min-Nan CHEN, Chia-Lian TSENG, Pao-Shan WENG

1973Volume 22Issue 9 Pages 492-496
Published: September 15, 1973
Released on J-STAGE: September 07, 2010

DOIhttps://doi.org/10.3769/radioisotopes.22.9_492

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A preliminary study on the treatment of radioactive liquid waste by dinonylnaphthalene sulphonic acid as liquid cation exchanger is given. Some fundamental studies on the selectivity coefficients and the gamma-radiation stability of dinonylnaphthalene sulfonic acid are presented and discussed. The selectivity coefficient is found to be the highest for the trivalent metal ions, and then the monovalent and the divalent metal ions in sequence; for the rare earth series the selectivity coefficient is decreasing with increasing atomic number. Further study on the radioactive waste disposal will be continued in Part II.

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Studies on Dinonylnaphthalene Sulphonic Acid as Liquid Ion Exchanger for Radioactive Liquid Waste Disposal (Part II)

Sung-Mao WANG, Chia-Lian TSENG, Chun-Nan HSU, Pao-Shan WENG

1973Volume 22Issue 9 Pages 497-502
Published: September 15, 1973
Released on J-STAGE: September 07, 2010

DOIhttps://doi.org/10.3769/radioisotopes.22.9_497

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A simplest yet effective method for radioactive waste treatment has been developed by using dinonylnaphthalene sulphonic acid as liquid cation exchanger. The removal efficiency of radioactive elements can increase to 99 % by using a single column in which only pieces of crushed porcelain or porous plates are placed and bubbled with compressed air. The batch method with air stirring or mechanical stirring is also highly effective. The preadjustment of the acid concentration plays an important role in using this method; the optimum concentration was found to be less than 0.001N and not lower than 0.0001N.

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Investigation on the Determination of Total Iron Binding Capacity of Serum Using Radioactive Iron ⁵⁹Fe

Shigeo KARIYONE, Michiaki SATOH, Katsuhiko FUJIMORI, Masahiro MIKI, Ta ...

1973Volume 22Issue 9 Pages 503-508
Published: September 15, 1973
Released on J-STAGE: September 07, 2010

DOIhttps://doi.org/10.3769/radioisotopes.22.9_503

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The determination of total iron binding capacity of serum was investigated. The reagents were supplied from Daiichi Radioisotope Laboratories as a TIBC Kit.
One ml of serum was added to a vial containing one ml of citric acid and Amberlite CG400 resin and then the vial was rotated for 15 minutes in order to isolate iron from transferrin and to remove it by the resin. By this treatment, almost 97 to 99 percent of serum iron was removed from transferrin.
One ml of liquid layer of the vial was taken and was added to another incubation vial containing 3μg of⁵⁹Fe labelled ferric ammonium citrate. During 20 minutes of incubation, ⁵⁹Fe radioactivity of the vial was counted (A cpm) .
After the incubation, the resin strip was added and the vial was rotated for 90 minutes. After elimination of the resin strip⁵⁹Fe radioactivity of the vial was again counted (B cpm) . Then
TIBC (μg/dl) = B/A×Fe (μg) ×200
The iron removal ratio was investigated using⁵⁹Fe labelled serum as a tracer of the serum iron. Ninety seven to 99% of iron was removed from the serum after 15 minutes incubation. Three % of iron remained in serum with 20μg/dl of serum iron, but only 1% of iron remained in serum with 300μg/dl of iron, after the treatment. The amount of serum in the vial did not affect the amount of remaining iron.
The changes of iron removal ratio in each citric acid vial with same serum were tested on seven samples and their TIBC values were determined. Both iron removal ratios and TIBC values showed quite similar results in every sample. Iron removal ratio somewhat decreased at 8°C. However, TIBC values showed no significant differences between 8°C and 37°C of temperature. There was a good correlation between the TIBC values by this method and TIBC values calculated from the amount of transferrin which were determined by immunological method. Also, there was a significant good correlation between TIBC values by this method and by chemical method using magnesium carbonate.
The determination of TIBC values of serum became easier than before by the application of this method. Also, it gave a correct values of TIBC and the data were quite steady for repeated determination.

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Determination of Unsaturated Iron Binding Capacity Using Res-O-Mat Fe Kit UIBC

Kiyoshi SASAKI, Toshiyuki TANOUE, Toshiko YASUDOME

1973Volume 22Issue 9 Pages 509-513
Published: September 15, 1973
Released on J-STAGE: September 07, 2010

DOIhttps://doi.org/10.3769/radioisotopes.22.9_509

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Res-O-Mat Fe Kit was developed to measure the unsaturated iron binding capacity (UIBC) using the resin strips for separating⁵⁹Fe and free iron. The procedure of this kit was easy.
This kit was recognized to be reliable as a result of the following investigation; 1) Time and temperature of incubation of transferrin and⁵⁹Fe, 2) Time and temperature of incubation of resin strip and free⁵⁹Fe, 3) Reproducibility, 4) Variance between the kits, 5) Effect of washing solution of instruments on UIBC values, 6) Correlation between this method and Irosorb, 7) Clinical application.
Then the normal values of each 25 male and female were 177±40 (109-260) μg/dl and 206±39 (123-278) μg/dl respectively.

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On the Monitoring of Tritium in the Atmosphere

Tamaki WATANABE, Syuziro MIZUNO, Kazuhisa KOSAKA

1973Volume 22Issue 9 Pages 514-517
Published: September 15, 1973
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.22.9_514

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Modulation Transfer Function of Scintiscanner's Collimator

Yasuo AIZAWA, Kazuo UEMURA, Takenori HACHIYA

1973Volume 22Issue 9 Pages 518-521
Published: September 15, 1973
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.22.9_518

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Scintigraphic Distribution of ⁶⁷Ga in the Normal Human Being

Kikuo MACHIDA, Motoo OSHIMA, Shimpei TADA, Hiroshi YASUKOCHI

1973Volume 22Issue 9 Pages 522-524
Published: September 15, 1973
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.22.9_522

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Application of Radioisotope Battery in Biomedical Engineering

Motokazu HORI, Takeo IMAI

1973Volume 22Issue 9 Pages 525-533
Published: September 15, 1973
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.22.9_525

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Present Status of Nuclear Medicine in Japan (1972) II, In vitro Tests

Hirotake KAKEHI, Hiromichi AKIBA

1973Volume 22Issue 9 Pages 534-538
Published: September 15, 1973
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.22.9_534

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Gage, Relay and Irradiation Facilities Using Radioisotopes (IX)

Nuclear Radiation Relay

Masami SHIMIZU

1973Volume 22Issue 9 Pages 539-544
Published: September 15, 1973
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.22.9_539

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[title in Japanese]

1973Volume 22Issue 9 Pages A1371-A924
Published: September 15, 1973
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.22.9_A1371

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