FIG. 1 is a perspective view of a door panel for an analytical instrument showing our new design, the broken line showing is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a front view of a door panel for an analytical instrument of FIG. 1;

FIG. 3 is a left side view of a door panel for an analytical instrument of FIG. 1, the right side view being a mirror image thereof;

FIG. 4 is a top view of a door panel for an analytical instrument of FIG. 1;

FIG. 5 is a bottom view of a door panel for an analytical instrument of FIG. 1; and,

FIG. 6 is a rear view of a door panel for an analytical instrument of FIG. 1.