Select the mortar and pestle that has the right characteristics and price for your application. Mortar and pestle sets come in a variety of different materials of construction. Consideration should be given as to whether what is being used currently is indeed the "right" choice given the lower limits of detection possible with modern analytical instrumentation.
TorrLube Oil is an extremely pure Perfluoropolyalkether blend which is thoroughly distilled and then filtered through a submicron screen. TorrLube oil has the ability to withstand thermal expansion and contraction as well as chemical and mechanical stress, while still maintaining consistent viscosity.
SPI presents a very high quality, state of the art, family of clear fused quartz based products. These products are produced by the leader in the quartz field and uses proprietary processes that give these quartz products an "edge" over all others. We use only the finest GE clear fused quartz for maximum UV transparency!