1. A portable x-ray fluorescence (XRF) analyzer comprising:an x-ray source and an x-ray detector;
an x-ray source heat-sink adjacent a side of the x-ray source;
an x-ray detector heat-sink adjacent a side of the x-ray detector;
the x-ray source heat-sink separated from the x-ray detector heat sink by a material having a thermal conductivity of less than 20 W/(m*K).