presence indicator
2.A directly titrimetric method of barium chloride using alizarin red as indicator for the determination of sulfate in high-copper material has been studied. The titration can be completed at pH2.5-3.0 in the presence of tartaric acid-sodium acid tartrate and ethanol. The interference of copper and some metal ions can be eliminated with the addition of appropriate masking agents.
3.When the concentration of NAD(P)H was far more excessive as compared with that of hematoporphyrin derivative (HPD) , the intensity of CL was positively proportional to the concentration of HPD, which implied that the CL measurement can be used as an indicator for the detection of photosensitized oxidation and that the CL may be generated by the photooxidation of NAD(P)H in the presence of reactive oxygen species(ROS).
