Patent ID: 11953479
Assignee: THE RESEARCH FOUNDATION FOR THE STATE UNIVERSITY OF NEW YORK
Field: Measurement (Instruments)
Classification: CPC G  C | IPC C  G

Claim 13:
14. An apparatus for performing a method for detecting a free sulfite in an aqueous analyte, comprising:
reacting the free sulfite in the aqueous analyte, with 4-(1H-pyrrol-2-yl)pyridine, having an optical absorption and being subject to bleaching by free sulfite; and
determining a colorimetric change resulting from the reacting, comprising measuring a change of the optical absorption by reaction of the free sulfite in the aqueous analyte with the 4-(1H-pyrrol-2-yl)pyridine,
the apparatus comprising:
a spectrometer;
a fluidic device configured to add the aqueous analyte in a sufficient quantity to bleach the 4-(1H-pyrrol-2-yl)pyridine by 10% at 463 nm; and
a calculation device, configured to determine and output a concentration of the free sulfite in the aqueous analyte based on the bleaching of 4-(1H-pyrrol-2-yl)pyridine determined by the spectrometer.