Abstract
Summary
The comparative effectiveness of CaCl2 and SrCl2 as clotting agents in various concentrations was studied with undiluted and diluted human plasma. It was found that the prothrombin time with SrCl2 is longer than with CaCl2, and also that the optimal molar concentration of strontium is much higher. Further, the range of concentrations with which a relatively short prothrombin time can be obtained is much smaller with SrCl2 than with CaCl2. This is taken as further evidence for the greater specificity of the calcium ion. Corresponding experiments with diluted rat plasma gave essentially similar results.
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