Quotables
"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 7333194 | Photometric analysis A beneficial photometric analytical method is described according to which an effective amount of at least one analytical agent for photometric analysis, is delivered from a support into a liquid sample, and advantageously a mixing action may be provided, by moving ... | 02/19/2008 |
| 6696300 | Arsenic analysis An improved method for the analysis of arsenic in an aqueous sample, is disclosed. In accordance with the inventive method, arsenic is reduced to arsine gas in an acidic aqueous reaction environment and in the presence of an effective amount of an agent f... | 02/24/2004 |
| 6541269 | Colorimetric test strips A method and calorimetric test strip for determining analyte concentration are provided. The test strip includes an aperture exposing a face of an calorimetric indicator-bearing carrier. Sensitivity is enhanced by flowing contact of the liquid to be analy... | 04/01/2003 |
| 5620658 | Colorimetric test strip A novel immersible colorimetric test strip is provided. The test strip includes a flow through, colorimetric indicator-bearing carrier, and a substance separately carried on the test strip for chemically modifying analyte into a detectible ionic form for ... | 04/15/1997 |
| 5491094 | Test strip for free chlorine analysis A colorimetric test strip useful for analysis of free chlorine is provided. In a preferred embodiment, 3,3',5,5'-tetramethylbenzidine is the colorimetric indicator. Beneficially, the carrier for the indicator has been treated to have a pH that eliminates ... | 02/13/1996 |
| 5106581 | Test device for detection of molybdate, vanadate and ferric ions Improved method and device for detection and semi-quantitative colorimetric determination of molybdate, ferric, and vanadate ions in aqueous solutions and coolant systems containing ethylene glycol and coolant additive. The disclosed device comprises of t... | 04/21/1992 |
