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The new Dispensette use trace analysis features many of the same safety and convenience features of the Dispensette use, but is optimized for the needs of dispensing high purity reagents. Designed to attach directly to your reagent bottle eliminating poured transfer, the Dispensette use trace analysis features a wiping seal piston to minimize reagent exposure. Only the high purity materials are in the flow path — PTFE, ETFE, PCTFE, FEP and PFA and sapphire for ball valves. Two models are available – one with Platinum-Iridium Valve springs, and one with tantalum Valve springs for different chemical compatibility and for different metal ion analysis. After following a field-tested cleaning procedure, metal ions are typically in the low ppb or even ppt range. The Platinum-Iridium 1183D06EA is also suitable for the dispensing of hydrofluoric acid. The dispensing cartridge is replaceable instruments feature a sliding pointer, well suited for rapid volume changes from one end of the range to the other. A scalloped inner track allows for easily reproducible settings.