![]() ![]() ![]() ![]() ![]() |
![]() ![]() ![]() ![]() |
![]() ![]() |
![]() |
( 86 of 86 ) |
United States Patent | 3,950,137 |
Larson , et al. | April 13, 1976 |
A method and apparatus for measuring the presence of a weak acid or weak base in a liquid by withdrawing a sample from the liquid; reacting the sample with an excess amount of strong acid or strong base reagent; measuring the conductivity of the reagent-treated sample and comparing the measured conductivity to a standard value.
Inventors: | Larson; Thurston E. (Champaign, IL), Lane; Russell W. (Champaign, IL), Neff; Chester H. (Champaign, IL) |
Assignee: |
Illinois State Water Survey of the Department of Registration and
(Champaign,
IL)
|
Appl. No.: | 05/514,234 |
Filed: | October 11, 1974 |
Application Number | Filing Date | Patent Number | Issue Date | ||
281778 | Aug., 1972 | 3904365 | |||
Current U.S. Class: | 422/81 ; 324/439; 422/111; 422/114; 422/115; 422/82.02 |
Current International Class: | G01N 27/06 (20060101); G01N 27/02 (20060101); G01N 027/10 (); G01N 033/20 () |
Field of Search: | 23/253R 324/3R,3B 204/1R,1T,195R,195T |
2559090 | July 1951 | Potter |
3531252 | September 1970 | Rivers |
![]() ![]() |
![]() ![]() ![]() ![]() |