Determination of Strontium-90 in Milk by an Ion Exchange Method

1961 ◽  
Vol 33 (10) ◽  
pp. 1306-1308 ◽  
Author(s):  
Charles. Porter ◽  
Daniel. Cahill ◽  
Roger. Schneider ◽  
Phillip. Robbins ◽  
Wilford. Perry ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Exchange Method ◽  
Strontium 90 ◽  
Ion Exchange Method

Ion Exchange Determination of Strontium-89 and Strontium-90 in Milk: Collaborative Study

1974 ◽  
Vol 57 (1) ◽  
pp. 37-38
Author(s):  
Edmond J Baratta
Keyword(s):  
Standard Deviation ◽  
Ion Exchange ◽  
Collaborative Study ◽  
Exchange Method ◽  
Strontium 90 ◽  
Ion Exchange Method ◽  
Cent Error

Abstract Eleven collaborators performed a second collaborative study of an ion exchange method for determining strontium-89 and -90. For milk containing 29.0 and 197 pCi/L of strontium- 89, the results at 2 levels were: average 31.0, 199.6; range 26-36, 164-290; standard deviation 2.9, 7.2; and per cent error 10.0, 3.4. For milk containing 32.4 and 151.2 pCi/L of strontium-90, the results were: average 32.5, 149.9; range 27.2-38.0, 125.3-170.3, standard deviation 0.32, 4.17; and per cent error 0.9, 2.8. The method has been adopted as official first action.

Ion Exchange Method for Rapid Determination of Alkalinity of Water-Soluble Tea Ash Containing High Levels of Manganese

1980 ◽  
Vol 63 (3) ◽  
pp. 460-461
Author(s):  
Saidul Z Qureshi ◽  
Fadhil M Najib ◽  
Fahmi A Mohammed
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Rapid Determination ◽  
Cation Exchange Resin ◽  
Water Soluble ◽  
Exchange Method ◽  
Strong Cation Exchange ◽  
Ion Exchange Method

Abstract An ion exchange method to determine the alkalinity of water-soluble tea ash containing high levels of manganese is described. A chromatographic column containing a strong cation exchange resin (20–50 mesh) in Na+ form, with a bed volume of 5 mL is used. The present ion exchange method is compared to pH titrations and also to the official AOAC methods (31.012, 31.015, 31.016). Results with the new method are accurate and precise.

Collaborative Study of a Zincon Ion Exchange Method for the Quantitative Determination of Zinc in Fertilizers

1971 ◽  
Vol 54 (4) ◽  
pp. 790-795
Author(s):  
C E Jones ◽  
L E Pracht
Keyword(s):  
Ion Exchange ◽  
Quantitative Determination ◽  
Atomic Absorption ◽  
Reference Data ◽  
Collaborative Study ◽  
Present Form ◽  
Exchange Method ◽  
Ion Exchange Method ◽  
Absorption Measurements

Abstract This collaborative study represents an attempt to validate the ion exchange zincon method for the quantitative determination of zinc in fertilizers. The values of the standard deviations Sd, Sr, and Sb and the results of the F- and t-tests are presented as an estimate of the precision, accuracy, and dependability. Atomic absorption measurements were also made and provided reference data for evaluation purposes. In its present form, the method falls short of expectations as an alternative wet approach to the dithizone method. It is recommended that the methods for determining zinc in fertilizers be studied further.

Determination of ammonia in blood plasma by an ion exchange method

1972 ◽  
Vol 42 (1) ◽  
pp. 141-146 ◽  
Author(s):  
Kengo Kurahasi ◽  
Akiko Ishihara ◽  
Hideo Uehara
Keyword(s):  
Ion Exchange ◽  
Blood Plasma ◽  
Exchange Method ◽  
Ion Exchange Method ◽  
In Blood Plasma

scholarly journals Protein-bound phosphorylserine in acid hydrolysates of brain tissue. The determination of [32P]phosphorylserine by ion-exchange chromatography and electrophoresis

1971 ◽  
Vol 121 (4) ◽  
pp. 597-600 ◽  
Author(s):  
D. A. Jones ◽  
R. Rodnight
Keyword(s):  
Ion Exchange ◽  
Specific Radioactivity ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Exchange Method ◽  
Unknown Composition ◽  
Ion Exchange Method ◽  
Guinea Pig Brain ◽  
Cortical Slices

1. Partial acid hydrolysates of proteins derived from cortical slices of guinea-pig brain were divided into two parts and fractionated by ion-exchange chromatography and high-voltage electrophoresis. 2. The apparent yield of protein-bound phosphorylserine by the ion-exchange method was about three times that obtained by electrophoresis. 3. The specific radioactivity of phosphorylserine isolated from 32P-labelled slices by electrophoresis was twice that isolated by chromatography. 4. The discrepancies were found to be due to the presence of unlabelled phosphates of unknown composition in the ‘phosphorylserine’ fraction obtained by the ion-exchange method. 5. Electrical stimulation of slices respiring in the presence of [32P]phosphate increased the specific radioactivity of the total phosphate in the chromatographic ‘phosphorylserine’ fraction by 53±11%, as compared with only 19±5% for the phosphorylserine isolated by electrophoresis.

Ion Exchange Method of estimating Strontium-90 and Other Radionuclides in Rainwater

Nature ◽  
1966 ◽  
Vol 211 (5044) ◽  
pp. 68-69 ◽  
Author(s):  
C. BRENAN ◽  
J. H. LOVATT ◽  
H. SMITH
Keyword(s):  
Ion Exchange ◽  
Exchange Method ◽  
Strontium 90 ◽  
Ion Exchange Method
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