Regarding response dynamics, the quartz tube mFPD has previ-ously been shown to be compatible with fast GC separations. Thus, no differences in this respect were anticipated or observed here for the SS mFPD. For example, Fig. 4 additionally illustrates the typical SS mFPD response obtained for a fast tetrahydrothiophene peak approaching the detection limit. As seen, a good profile is obtained for this narrow peak possessing a half-width near 700 milli seconds, which aligns well with formal designations of ‘fast’ GC