Perez de Vargas-Sansalvador, I. M. published the artcileA new light emitting diode-light emitting diode portable carbon dioxide gas sensor based on an interchangeable membrane system for industrial applications, Recommanded Product: 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one, the publication is Analytica Chimica Acta (2011), 699(2), 216-222, database is CAplus and MEDLINE.
A CO2 measurement system (0-100%) based on a paired emitter-detector diode arrangement as a colorimetric detector is described. Two different configurations were tested. Configuration 1 (opposite side configuration), where a secondary inner filter effect accounted for CO2 sensitivity, involved absorption of phosphorescence emitted from a CO2-insensitive luminophore by an acid-base indicator. Configuration 2, where the luminophore-containing membrane was removed, simplified the sensing membrane which now only contained the acid-base indicator. Also, 2 different instrumental configurations were assessed, using a paired emitter/detector diode system consisting of 2 light-emitting diodes (LED) where one diode was used as the light source (emitter) and the other diode was used in reverse bias mode as the light detector. The first configuration used a green LED as emitter and a red LED as detector; the second configuration used 2 identical red LED as emitter and detector. The system was characterized for sensitivity, dynamic response, reproducibility, stability, and temperature influence. Results showed configuration 2 had a better CO2 response in terms of sensitivity.
Analytica Chimica Acta published new progress about 596-01-0. 596-01-0 belongs to benzofurans, auxiliary class Benzofuran,Naphthalene,Alcohol,Ester, name is 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one, and the molecular formula is C28H18O4, Recommanded Product: 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one.
Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem