Fig. 3D demonstrates this with bright blue sulfur emission in the worker flame region. Since the background emission of these worker flames was also low in the SS mFPD, it presented an interesting and unique opportunity to probe analyte response in them directly for the first time. Of note, this task was impossible with the quartz tube mFPD due to its enormous background level at this same position (Fig. 3A and B). Further, to the best of our knowledge, monitoring the collective chemiluminescence of multiple flames simultaneously has not been previously demonstrated in an FPD. Therefore since this couldbe readily attempted in the SS mFPD, the response characteristics of the worker flames were also preliminarily examined here.