The present invention provides ratiometric fluorescent pH sensors for non-invasive, continuous monitoring of pH in such applications as fermentation processes. The ratiometric fluorescent pH sensors comprise a fluorescent dye that exhibits a shift in excitation wavelength with a corresponding shift in pH in the local environment of said fluorescent dye. Ratiometric measurements of the emission intensities at dual excitation maxima correlate to pH. Also provided is a fluorescent dye 6-methacryloyl-8-hydroxy-1,3-pyrene disulfonic acid (MA-HPDS). Further provided are systems and methods to non-invasively and continuously monitor pH.
本发明提供了比率计荧光 pH 传感器,用于在发酵过程等应用中对 pH 值进行非侵入式连续监测。比率荧光 pH 传感器包括一种荧光
染料,该
染料的激发波长会随着所述荧光
染料局部环境中 pH 值的相应变化而变化。双激发最大值处发射强度的比率测量与 pH 值相关。还提供了一种荧光
染料 6-甲基
丙烯酰基-8-羟基-1,3-
苯乙烯二
磺酸(MA-HPDS)。此外,还提供了非侵入式连续监测 pH 值的系统和方法。