Apparatus and method for determining the osmolarity/specific gravity of a solution
First Claim
1. An apparatus for determining the specific gravity or osmolarity of a sample solution comprising:
- support means;
a plurality of test solutions, each test solution having a known and predetermined specific gravity; and
semipermeable membrane means for sealingly enclosing each of the test solutions on the support means so that reaction of a test solution with a constituent of the sample solution in the area enclosed within the semipermeable membrane indicates that osmotic diffusion has occurred through the semipermeable membrane.
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Abstract
A novel apparatus and method for determining osmolarity and/or specific gravity of a sample solution, the apparatus including a plurality of test solutions, each test solution having a predetermined specific gravity within a predetermined specific gravity range and also containing the dye, the dye being activated by substances in the sample solution. Test solutions having a higher specific gravity than the sample solution will experience osmotic diffusion across the semipermeable membrane and activation of the dye therein. The test solutions are sequentially arrayed on a support member so that the next succeeding test solution without a color change indicates the degree of osmolarity and/or specific gravity of the sample solution.
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Citations
10 Claims
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1. An apparatus for determining the specific gravity or osmolarity of a sample solution comprising:
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support means; a plurality of test solutions, each test solution having a known and predetermined specific gravity; and semipermeable membrane means for sealingly enclosing each of the test solutions on the support means so that reaction of a test solution with a constituent of the sample solution in the area enclosed within the semipermeable membrane indicates that osmotic diffusion has occurred through the semipermeable membrane. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Test means for determination of specific gravity or osmolarity of a sample solution comprising:
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a support means; a plurality of cavities in the support means; a plurality of test solutions placed in each of the cavities, each test solution having a predetermined specific gravity within a predetermined specific gravity range; indicator means in each of the test solutions, the indicator means being operable to selectively indicate the presence of substances from the sample solution; and semipermeable membrane means for sealingly enclosing each of the test solutions and the dye means on each of the cavities on the support means, the semipermeable membrane means being operable to accommodate osmotic diffusion of substances from a sample solution into test solutions in each of the cavities wherein the respective test solutions have a higher specific gravity than the sample solution, the osmotic diffusion of substances from the sample solution activating the dye in the test solution. - View Dependent Claims (8, 9)
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10. A method for determining specific gravity or osmolarity of a liquid comprising:
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sealingly enclosing with a semipermeable membrane means, a plurality of discrete bodies of test solutions, each test solution having a predetermined specific gravity and a dye indicator means for indicating a color change upon passage of substances from the sample solution into the test solution; immersing the semipermeable membranes and sealingly enclosed test solutions into a sample solution thereby allowing substances from the sample solution to osmotically diffuse across the semipermeable membrane into test solutions having a higher specific gravity than the sample solution, substances from the sample solution causing a color change within the test solution; and visually observing the test solutions through the semipermeable membrane thereby comparing color changes of the test solutions as a function of osmolarity between the test solutions and the sample solution.
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Specification