Inventors:
Radislav A. Potyrailo - Niskayuna NY, US
Timothy M. Sivavec - Clifton Park NY, US
Caibin Xiao - Harleysville PA, US
Theodore J. Cecconie - Buckingham PA, US
Lamyaa Hassib - Niskayuna NY, US
Andrew M. Leach - Clifton Park NY, US
David B. Engel - The Woodlands TX, US
Assignee:
General Electric Company - Schenectady NY
International Classification:
G01N 21/00
US Classification:
436164, 436166, 436167, 436169, 436171, 436172, 436800, 436805, 422 50
Abstract:
A method of quantitatively measuring the concentration of a chemical species in a sample solution with a sensor film. A hydrogel sensor film is prepared having a chemical composition comprising an indicator that changes its optical property in the ultra-violet, visible or near-infrared spectral range upon being exposed to the chemical species in the sample solution. The film is exposed to a fixed amount of the sample solution. The concentration of the chemical species in the sample solution is quantified using the average absorbance measured from the sensor film.