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Title: RADIOMETRIC METHODS FOR THE DETERMINATION OF MAGNESIUM AND CALCIUM IN PORTLAND CEMENT

Abstract

Radiometric methods of analysis for magnesium and calcium have been developed as part of a program for the U. S. Atomic Energy Commission. Office of Isotopes Development, which are applicable to the determination of these elements in portland cement Both methods employ, as a precipitant, a standard solution of (NH/sub 4/)/sub 2/HPO/sub 4/ labeled with phosphorus-32. In the presence of NH/ sub 4/OH, this reagent precipitate; MgNH/sub 4/PO/sub 4/ or Ca/sub 3/(PO/sub 4/)/ sub 2/ from a solution of magnesium or calcium ions. The reduction in the radioactivity level of the labeled phosphate solution after precipitation serves as a measure of the phosphate reacted and thus a measure of the quantity of magnesium or calcium present. Studies have been made of the effects of reagent concentration, NH/sub 4/OH concentration, and other experimental variables. The interference of other elements present normally in portland cement and its raw materials has been determined. The concentration ranges for highest accuracy have been found to be 5 to 15 mg of MgO per 100 ml and 15 to 30 mg of CaO per 50 ml. (auth)

Authors:
; ; ; ;
Publication Date:
Research Org.:
Battelle Memorial Inst., Columbus, Ohio
OSTI Identifier:
4157598
Report Number(s):
BMI-1415
NSA Number:
NSA-14-010434
DOE Contract Number:  
W-7405-ENG-92
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-60
Country of Publication:
United States
Language:
English
Subject:
CHEMISTRY; AMMONIUM COMPOUNDS; CALCIUM; CALCIUM OXIDES; CALCIUM PHOSPHATES; CEMENTS; LABELLED COMPOUNDS; LEVELS; MAGNESIUM; MAGNESIUM OXIDES; MEASURED VALUES; PHOSPHATES; PHOSPHORUS 32; PRECIPITATION; QUANTITATIVE ANALYSIS; RADIOACTIVITY; RADIOMETERS; SENSITIVITY; SOLUTIONS; STANDARDS; THERMAL RADIATION; USES

Citation Formats

Brown, C.T., Howes, J.E. Jr., Elleman, T.S., Townley, C.W., and Sunderman, D.N. RADIOMETRIC METHODS FOR THE DETERMINATION OF MAGNESIUM AND CALCIUM IN PORTLAND CEMENT. United States: N. p., 1960. Web. doi:10.2172/4157598.
Brown, C.T., Howes, J.E. Jr., Elleman, T.S., Townley, C.W., & Sunderman, D.N. RADIOMETRIC METHODS FOR THE DETERMINATION OF MAGNESIUM AND CALCIUM IN PORTLAND CEMENT. United States. doi:10.2172/4157598.
Brown, C.T., Howes, J.E. Jr., Elleman, T.S., Townley, C.W., and Sunderman, D.N. Thu . "RADIOMETRIC METHODS FOR THE DETERMINATION OF MAGNESIUM AND CALCIUM IN PORTLAND CEMENT". United States. doi:10.2172/4157598. https://www.osti.gov/servlets/purl/4157598.
@article{osti_4157598,
title = {RADIOMETRIC METHODS FOR THE DETERMINATION OF MAGNESIUM AND CALCIUM IN PORTLAND CEMENT},
author = {Brown, C.T. and Howes, J.E. Jr. and Elleman, T.S. and Townley, C.W. and Sunderman, D.N.},
abstractNote = {Radiometric methods of analysis for magnesium and calcium have been developed as part of a program for the U. S. Atomic Energy Commission. Office of Isotopes Development, which are applicable to the determination of these elements in portland cement Both methods employ, as a precipitant, a standard solution of (NH/sub 4/)/sub 2/HPO/sub 4/ labeled with phosphorus-32. In the presence of NH/ sub 4/OH, this reagent precipitate; MgNH/sub 4/PO/sub 4/ or Ca/sub 3/(PO/sub 4/)/ sub 2/ from a solution of magnesium or calcium ions. The reduction in the radioactivity level of the labeled phosphate solution after precipitation serves as a measure of the phosphate reacted and thus a measure of the quantity of magnesium or calcium present. Studies have been made of the effects of reagent concentration, NH/sub 4/OH concentration, and other experimental variables. The interference of other elements present normally in portland cement and its raw materials has been determined. The concentration ranges for highest accuracy have been found to be 5 to 15 mg of MgO per 100 ml and 15 to 30 mg of CaO per 50 ml. (auth)},
doi = {10.2172/4157598},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1960},
month = {2}
}